Initial AON3D M2+ dual MCU configuration

- Octopus Pro: Motors (MOTOR0-7), bed heater (PA1), chamber heater (PB10) - Azteeg X3: Thermistors, endstops, probe, fan, hotend heaters - IDEX setup with external DM542T drivers - Includes wiring documentation and swap guide Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
2026-01-12 20:52:58 -05:00
commit ef868e7953
26 changed files with 3973 additions and 0 deletions
--- a/docs/BIGTREETECH
+++ b/docs/BIGTREETECH
--- a/docs/BIGTREETECH-Octopus-Pro-V1.0-Color-PIN-V3.0.pdf
+++ b/docs/BIGTREETECH-Octopus-Pro-V1.0-Color-PIN-V3.0.pdf
--- a/docs/BTT_Octopus_pro_EN.pdf
+++ b/docs/BTT_Octopus_pro_EN.pdf
--- a/docs/azteeg-to-octopus-mapping.md
+++ b/docs/azteeg-to-octopus-mapping.md
@@ -0,0 +1,79 @@
+# Azteeg X3 → Octopus Pro Swap Guide
+
+**Do NOT install M0DIAG-M7DIAG jumpers**
+
+---
+
+## MOTORS (left to right on Octopus)
+
+| Motor | Axis | Step | Dir | Enable |
+|-------|------|------|-----|--------|
+| MOTOR0 | X (T0) | PF13 | PF12 | PF14 |
+| MOTOR1 | Y (left) | PG0 | PG1 | PF15 |
+| MOTOR2 | Z (left) | PF11 | PG3 | PG5 |
+| MOTOR3 | E0 (T0) | PG4 | PC1 | PA0 |
+| MOTOR4 | E1 (T1) | PF9 | PF10 | PG2 |
+| MOTOR5 | X2 (T1) | PC13 | PF0 | PF1 |
+| MOTOR6 | Y1 (right) | PE2 | PE3 | PD4 |
+| MOTOR7 | Z1 (right) | PE6 | PA14 | PE0 |
+
+---
+
+## ENDSTOPS
+
+| Wire from Azteeg | → | Octopus Pin |
+|------------------|---|-------------|
+| X min endstop | → | PG6 |
+| X2 endstop | → | PG9 |
+| Y min endstop | → | PG10 |
+| Y1 endstop | → | PG11 |
+| Z min endstop | → | PG12 |
+| Z1 endstop | → | PG13 |
+
+---
+
+## THERMISTORS
+
+| Wire from Azteeg | → | Octopus Pin |
+|------------------|---|-------------|
+| Extruder 0 thermistor | → | PF4 |
+| Extruder 1 thermistor | → | PF5 |
+| Chamber thermistor | → | PF6 |
+| Bed thermistor | → | PF3 |
+
+---
+
+## HEATERS
+
+| Wire from Azteeg | Azteeg Pin | → | Octopus Pin |
+|------------------|------------|---|-------------|
+| Hotend 0 heater | ar10 | → | PA2 (HE0) |
+| Hotend 1 heater | ar9 | → | PA3 (HE1) |
+| Chamber heater | ar4 | → | PB10 (HE2) |
+| Bed heater | ar8 | → | PA1 (HB) |
+
+---
+
+## FANS
+
+| Wire from Azteeg | → | Octopus Pin |
+|------------------|---|-------------|
+| Enclosure fan | → | PD12 |
+
+---
+
+## PROBE
+
+| Wire from Azteeg | → | Octopus Pin |
+|------------------|---|-------------|
+| Probe signal | → | PG15 |
+
+---
+
+## POWER
+
+| Wire from Azteeg | → | Octopus |
+|------------------|---|---------|
+| 24V + | → | VIN + |
+| 24V - | → | VIN - |
+| USB to Pi | → | USB-C |
--- a/docs/octopus-pro-wiring.svg
+++ b/docs/octopus-pro-wiring.svg
@@ -0,0 +1,368 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1200 900" width="1200" height="900">
+  <defs>
+    <style>
+      .board { fill: #1a1a2e; stroke: #4a4a6a; stroke-width: 3; }
+      .header { fill: #2d2d44; stroke: #6a6a8a; stroke-width: 1; }
+      .header-motor { fill: #3d5a3d; stroke: #5a8a5a; stroke-width: 1; }
+      .header-heater { fill: #5a3d3d; stroke: #8a5a5a; stroke-width: 1; }
+      .header-therm { fill: #3d3d5a; stroke: #5a5a8a; stroke-width: 1; }
+      .header-fan { fill: #3d5a5a; stroke: #5a8a8a; stroke-width: 1; }
+      .header-endstop { fill: #5a5a3d; stroke: #8a8a5a; stroke-width: 1; }
+      .header-power { fill: #5a3d5a; stroke: #8a5a8a; stroke-width: 1; }
+      .label { font-family: monospace; font-size: 11px; fill: #ffffff; }
+      .label-small { font-family: monospace; font-size: 9px; fill: #cccccc; }
+      .label-title { font-family: Arial, sans-serif; font-size: 14px; fill: #ffffff; font-weight: bold; }
+      .label-header { font-family: Arial, sans-serif; font-size: 20px; fill: #ffffff; font-weight: bold; }
+      .wire { stroke-width: 2; fill: none; }
+      .wire-step { stroke: #ff6b6b; }
+      .wire-dir { stroke: #4ecdc4; }
+      .wire-en { stroke: #ffe66d; }
+      .wire-gnd { stroke: #888888; }
+      .wire-signal { stroke: #95e1d3; }
+      .wire-power { stroke: #ff8c42; }
+      .driver-box { fill: #2a2a3a; stroke: #5a5a7a; stroke-width: 2; rx: 5; }
+      .connector { fill: #4a4a6a; stroke: #7a7a9a; stroke-width: 1; }
+      .pin { fill: #gold; stroke: #aa8800; stroke-width: 0.5; }
+      .note { font-family: Arial, sans-serif; font-size: 10px; fill: #aaaaaa; }
+    </style>
+  </defs>
+
+  <!-- Background -->
+  <rect width="1200" height="900" fill="#0d0d1a"/>
+
+  <!-- Title -->
+  <text x="600" y="35" text-anchor="middle" class="label-header">AON3D M2+ Wiring Diagram - BTT Octopus Pro v1.0.1</text>
+  <text x="600" y="55" text-anchor="middle" class="note">External DM542T Stepper Drivers Configuration</text>
+
+  <!-- Octopus Pro Board -->
+  <rect x="50" y="80" width="400" height="700" class="board" rx="10"/>
+  <text x="250" y="110" text-anchor="middle" class="label-title">BTT OCTOPUS PRO v1.0.1</text>
+
+  <!-- Motor Headers -->
+  <g id="motor-headers">
+    <text x="70" y="145" class="label-title">MOTOR OUTPUTS</text>
+
+    <!-- MOTOR0 -->
+    <rect x="70" y="155" width="80" height="35" class="header-motor" rx="3"/>
+    <text x="110" y="175" text-anchor="middle" class="label">MOTOR0</text>
+    <text x="110" y="185" text-anchor="middle" class="label-small">X Axis</text>
+
+    <!-- MOTOR1 -->
+    <rect x="160" y="155" width="80" height="35" class="header-motor" rx="3"/>
+    <text x="200" y="175" text-anchor="middle" class="label">MOTOR1</text>
+    <text x="200" y="185" text-anchor="middle" class="label-small">X2 (IDEX)</text>
+
+    <!-- MOTOR2 -->
+    <rect x="250" y="155" width="80" height="35" class="header-motor" rx="3"/>
+    <text x="290" y="175" text-anchor="middle" class="label">MOTOR2</text>
+    <text x="290" y="185" text-anchor="middle" class="label-small">Y Axis</text>
+
+    <!-- MOTOR3 -->
+    <rect x="340" y="155" width="80" height="35" class="header-motor" rx="3"/>
+    <text x="380" y="175" text-anchor="middle" class="label">MOTOR3</text>
+    <text x="380" y="185" text-anchor="middle" class="label-small">Y1 Axis</text>
+
+    <!-- MOTOR4 -->
+    <rect x="70" y="200" width="80" height="35" class="header-motor" rx="3"/>
+    <text x="110" y="220" text-anchor="middle" class="label">MOTOR4</text>
+    <text x="110" y="230" text-anchor="middle" class="label-small">Z Axis</text>
+
+    <!-- MOTOR5 -->
+    <rect x="160" y="200" width="80" height="35" class="header-motor" rx="3"/>
+    <text x="200" y="220" text-anchor="middle" class="label">MOTOR5</text>
+    <text x="200" y="230" text-anchor="middle" class="label-small">Z1 Axis</text>
+
+    <!-- MOTOR6 -->
+    <rect x="250" y="200" width="80" height="35" class="header-motor" rx="3"/>
+    <text x="290" y="220" text-anchor="middle" class="label">MOTOR6</text>
+    <text x="290" y="230" text-anchor="middle" class="label-small">Extruder 0</text>
+
+    <!-- MOTOR7 -->
+    <rect x="340" y="200" width="80" height="35" class="header-motor" rx="3"/>
+    <text x="380" y="220" text-anchor="middle" class="label">MOTOR7</text>
+    <text x="380" y="230" text-anchor="middle" class="label-small">Extruder 1</text>
+  </g>
+
+  <!-- Endstop Headers -->
+  <g id="endstop-headers">
+    <text x="70" y="265" class="label-title">ENDSTOPS (DIAG)</text>
+
+    <rect x="70" y="275" width="55" height="30" class="header-endstop" rx="3"/>
+    <text x="97" y="293" text-anchor="middle" class="label-small">DIAG0</text>
+    <text x="97" y="302" text-anchor="middle" class="label-small">X-min</text>
+
+    <rect x="130" y="275" width="55" height="30" class="header-endstop" rx="3"/>
+    <text x="157" y="293" text-anchor="middle" class="label-small">DIAG1</text>
+    <text x="157" y="302" text-anchor="middle" class="label-small">X2</text>
+
+    <rect x="190" y="275" width="55" height="30" class="header-endstop" rx="3"/>
+    <text x="217" y="293" text-anchor="middle" class="label-small">DIAG2</text>
+    <text x="217" y="302" text-anchor="middle" class="label-small">Y-min</text>
+
+    <rect x="250" y="275" width="55" height="30" class="header-endstop" rx="3"/>
+    <text x="277" y="293" text-anchor="middle" class="label-small">DIAG3</text>
+    <text x="277" y="302" text-anchor="middle" class="label-small">Y1</text>
+
+    <rect x="310" y="275" width="55" height="30" class="header-endstop" rx="3"/>
+    <text x="337" y="293" text-anchor="middle" class="label-small">DIAG4</text>
+    <text x="337" y="302" text-anchor="middle" class="label-small">Z-min</text>
+
+    <rect x="370" y="275" width="55" height="30" class="header-endstop" rx="3"/>
+    <text x="397" y="293" text-anchor="middle" class="label-small">DIAG5</text>
+    <text x="397" y="302" text-anchor="middle" class="label-small">Z1</text>
+  </g>
+
+  <!-- Thermistor Headers -->
+  <g id="thermistor-headers">
+    <text x="70" y="340" class="label-title">THERMISTORS</text>
+
+    <rect x="70" y="350" width="70" height="35" class="header-therm" rx="3"/>
+    <text x="105" y="370" text-anchor="middle" class="label">T0</text>
+    <text x="105" y="380" text-anchor="middle" class="label-small">Extruder 0</text>
+
+    <rect x="150" y="350" width="70" height="35" class="header-therm" rx="3"/>
+    <text x="185" y="370" text-anchor="middle" class="label">T1</text>
+    <text x="185" y="380" text-anchor="middle" class="label-small">Extruder 1</text>
+
+    <rect x="230" y="350" width="70" height="35" class="header-therm" rx="3"/>
+    <text x="265" y="370" text-anchor="middle" class="label">T2</text>
+    <text x="265" y="380" text-anchor="middle" class="label-small">Chamber</text>
+
+    <rect x="310" y="350" width="70" height="35" class="header-therm" rx="3"/>
+    <text x="345" y="370" text-anchor="middle" class="label">TB</text>
+    <text x="345" y="380" text-anchor="middle" class="label-small">Bed</text>
+  </g>
+
+  <!-- Heater Headers -->
+  <g id="heater-headers">
+    <text x="70" y="420" class="label-title">HEATERS</text>
+
+    <rect x="70" y="430" width="70" height="35" class="header-heater" rx="3"/>
+    <text x="105" y="450" text-anchor="middle" class="label">HE0</text>
+    <text x="105" y="460" text-anchor="middle" class="label-small">Hotend 0</text>
+
+    <rect x="150" y="430" width="70" height="35" class="header-heater" rx="3"/>
+    <text x="185" y="450" text-anchor="middle" class="label">HE1</text>
+    <text x="185" y="460" text-anchor="middle" class="label-small">Hotend 1</text>
+
+    <rect x="230" y="430" width="70" height="35" class="header-heater" rx="3"/>
+    <text x="265" y="450" text-anchor="middle" class="label">HE2</text>
+    <text x="265" y="460" text-anchor="middle" class="label-small">Chamber</text>
+
+    <rect x="310" y="430" width="80" height="35" class="header-heater" rx="3"/>
+    <text x="350" y="450" text-anchor="middle" class="label">HB</text>
+    <text x="350" y="460" text-anchor="middle" class="label-small">Bed (10A)</text>
+  </g>
+
+  <!-- Fan Headers -->
+  <g id="fan-headers">
+    <text x="70" y="500" class="label-title">FANS</text>
+
+    <rect x="70" y="510" width="50" height="30" class="header-fan" rx="3"/>
+    <text x="95" y="528" text-anchor="middle" class="label-small">FAN0</text>
+
+    <rect x="125" y="510" width="50" height="30" class="header-fan" rx="3"/>
+    <text x="150" y="528" text-anchor="middle" class="label-small">FAN1</text>
+
+    <rect x="180" y="510" width="50" height="30" class="header-fan" rx="3"/>
+    <text x="205" y="528" text-anchor="middle" class="label">FAN2</text>
+
+    <rect x="235" y="510" width="50" height="30" class="header-fan" rx="3"/>
+    <text x="260" y="528" text-anchor="middle" class="label-small">FAN3</text>
+
+    <rect x="290" y="510" width="50" height="30" class="header-fan" rx="3"/>
+    <text x="315" y="528" text-anchor="middle" class="label-small">FAN4</text>
+
+    <text x="205" y="555" text-anchor="middle" class="note">FAN2 = Enclosure Fan</text>
+  </g>
+
+  <!-- Probe Header -->
+  <g id="probe-header">
+    <text x="70" y="585" class="label-title">PROBE</text>
+    <rect x="70" y="595" width="80" height="35" class="header-endstop" rx="3"/>
+    <text x="110" y="615" text-anchor="middle" class="label">PROBE</text>
+    <text x="110" y="625" text-anchor="middle" class="label-small">PG15</text>
+  </g>
+
+  <!-- Power Header -->
+  <g id="power-header">
+    <text x="70" y="660" class="label-title">POWER</text>
+    <rect x="70" y="670" width="100" height="40" class="header-power" rx="3"/>
+    <text x="120" y="693" text-anchor="middle" class="label">24V IN</text>
+
+    <rect x="180" y="670" width="80" height="40" class="header" rx="3"/>
+    <text x="220" y="693" text-anchor="middle" class="label">USB-C</text>
+  </g>
+
+  <!-- Pin Reference -->
+  <g id="pin-reference">
+    <text x="70" y="740" class="label-title">PIN REFERENCE</text>
+    <text x="70" y="758" class="label-small">MOTOR0: STEP=PF13, DIR=PF12, EN=PF14</text>
+    <text x="70" y="770" class="label-small">MOTOR1: STEP=PG0,  DIR=PG1,  EN=PF15</text>
+    <text x="70" y="782" class="label-small">MOTOR2: STEP=PF11, DIR=PG3,  EN=PG5</text>
+    <text x="70" y="794" class="label-small">MOTOR3: STEP=PG4,  DIR=PC1,  EN=PA0</text>
+    <text x="250" y="758" class="label-small">MOTOR4: STEP=PF9,  DIR=PF10, EN=PG2</text>
+    <text x="250" y="770" class="label-small">MOTOR5: STEP=PC13, DIR=PF0,  EN=PF1</text>
+    <text x="250" y="782" class="label-small">MOTOR6: STEP=PE2,  DIR=PE3,  EN=PD4</text>
+    <text x="250" y="794" class="label-small">MOTOR7: STEP=PE6,  DIR=PA14, EN=PE0</text>
+  </g>
+
+  <!-- DM542T Drivers (right side) -->
+  <g id="dm542t-drivers">
+    <text x="700" y="90" text-anchor="middle" class="label-title">EXTERNAL DM542T DRIVERS (x8)</text>
+
+    <!-- Driver template shown for clarity -->
+    <rect x="520" y="110" width="150" height="180" class="driver-box"/>
+    <text x="595" y="135" text-anchor="middle" class="label">DM542T</text>
+    <text x="595" y="150" text-anchor="middle" class="label-small">Driver Template</text>
+
+    <!-- Input side -->
+    <text x="540" y="175" class="label-small">INPUTS:</text>
+    <text x="540" y="190" class="label-small">PUL+ ← STEP</text>
+    <text x="540" y="202" class="label-small">PUL- ← GND</text>
+    <text x="540" y="214" class="label-small">DIR+ ← DIR</text>
+    <text x="540" y="226" class="label-small">DIR- ← GND</text>
+    <text x="540" y="238" class="label-small">ENA+ ← EN</text>
+    <text x="540" y="250" class="label-small">ENA- ← GND</text>
+
+    <!-- Output side -->
+    <text x="540" y="270" class="label-small">OUTPUTS: A+,A-,B+,B-</text>
+    <text x="540" y="282" class="label-small">POWER: V+, V-</text>
+
+    <!-- Connection diagram -->
+    <text x="700" y="130" class="label-title">CONNECTION PATTERN</text>
+
+    <rect x="700" y="145" width="180" height="145" class="driver-box"/>
+
+    <!-- From Octopus -->
+    <text x="715" y="165" class="label-small" fill="#ff6b6b">STEP (pin 2) ──► PUL+</text>
+    <text x="715" y="180" class="label-small" fill="#4ecdc4">DIR  (pin 3) ──► DIR+</text>
+    <text x="715" y="195" class="label-small" fill="#ffe66d">EN   (pin 4) ──► ENA+</text>
+    <text x="715" y="210" class="label-small" fill="#888888">GND  (pin 1) ──► PUL-</text>
+    <text x="715" y="225" class="label-small" fill="#888888">          ├──► DIR-</text>
+    <text x="715" y="240" class="label-small" fill="#888888">          └──► ENA-</text>
+
+    <text x="715" y="265" class="label-small">To Motor: A+, A-, B+, B-</text>
+    <text x="715" y="280" class="label-small">Power: 24-48V DC</text>
+  </g>
+
+  <!-- Driver assignments table -->
+  <g id="driver-table">
+    <text x="900" y="90" text-anchor="middle" class="label-title">DRIVER ASSIGNMENTS</text>
+
+    <rect x="890" y="100" width="280" height="200" fill="#1a1a2e" stroke="#4a4a6a" rx="5"/>
+
+    <text x="910" y="125" class="label-small">OCTOPUS    DRIVER      MOTOR</text>
+    <text x="910" y="140" class="label-small">────────────────────────────</text>
+    <text x="910" y="155" class="label-small">MOTOR0  →  DM542T #1 → X</text>
+    <text x="910" y="170" class="label-small">MOTOR1  →  DM542T #2 → X2 (IDEX)</text>
+    <text x="910" y="185" class="label-small">MOTOR2  →  DM542T #3 → Y</text>
+    <text x="910" y="200" class="label-small">MOTOR3  →  DM542T #4 → Y1</text>
+    <text x="910" y="215" class="label-small">MOTOR4  →  DM542T #5 → Z</text>
+    <text x="910" y="230" class="label-small">MOTOR5  →  DM542T #6 → Z1</text>
+    <text x="910" y="245" class="label-small">MOTOR6  →  DM542T #7 → E0</text>
+    <text x="910" y="260" class="label-small">MOTOR7  →  DM542T #8 → E1</text>
+    <text x="910" y="290" class="label-small">Total: 8 motor channels</text>
+  </g>
+
+  <!-- Wiring color legend -->
+  <g id="legend">
+    <text x="520" y="330" class="label-title">WIRE COLOR LEGEND</text>
+    <rect x="520" y="340" width="200" height="100" fill="#1a1a2e" stroke="#4a4a6a" rx="5"/>
+
+    <line x1="535" y1="360" x2="575" y2="360" class="wire wire-step"/>
+    <text x="585" y="364" class="label-small">STEP signal</text>
+
+    <line x1="535" y1="380" x2="575" y2="380" class="wire wire-dir"/>
+    <text x="585" y="384" class="label-small">DIR signal</text>
+
+    <line x1="535" y1="400" x2="575" y2="400" class="wire wire-en"/>
+    <text x="585" y="404" class="label-small">ENABLE signal</text>
+
+    <line x1="535" y1="420" x2="575" y2="420" class="wire wire-gnd"/>
+    <text x="585" y="424" class="label-small">GND (common)</text>
+  </g>
+
+  <!-- Heater/Sensor wiring -->
+  <g id="heater-wiring">
+    <text x="520" y="470" class="label-title">HEATER &amp; SENSOR WIRING</text>
+    <rect x="520" y="480" width="350" height="150" fill="#1a1a2e" stroke="#4a4a6a" rx="5"/>
+
+    <text x="535" y="505" class="label-small">THERMISTORS (2-wire, not polarized):</text>
+    <text x="545" y="520" class="label-small">T0 (PF4) ← Extruder 0 thermistor</text>
+    <text x="545" y="535" class="label-small">T1 (PF5) ← Extruder 1 thermistor</text>
+    <text x="545" y="550" class="label-small">T2 (PF6) ← Chamber thermistor</text>
+    <text x="545" y="565" class="label-small">TB (PF3) ← Bed thermistor</text>
+
+    <text x="535" y="590" class="label-small">HEATERS:</text>
+    <text x="545" y="605" class="label-small">HE0 (PA2) → Hotend 0    HE2 (PB10) → Chamber</text>
+    <text x="545" y="620" class="label-small">HE1 (PA3) → Hotend 1    HB  (PA1)  → Bed</text>
+  </g>
+
+  <!-- Endstop wiring -->
+  <g id="endstop-wiring">
+    <text x="520" y="660" class="label-title">ENDSTOP WIRING</text>
+    <rect x="520" y="670" width="350" height="110" fill="#1a1a2e" stroke="#4a4a6a" rx="5"/>
+
+    <text x="535" y="695" class="label-small">ENDSTOP PIN ASSIGNMENTS:</text>
+    <text x="545" y="710" class="label-small">DIAG0 (PG6)  → X min      DIAG3 (PG11) → Y1</text>
+    <text x="545" y="725" class="label-small">DIAG1 (PG9)  → X2/IDEX    DIAG4 (PG12) → Z min</text>
+    <text x="545" y="740" class="label-small">DIAG2 (PG10) → Y min      DIAG5 (PG13) → Z1</text>
+    <text x="545" y="760" class="label-small">PROBE (PG15) → Bed probe (with pull-up: ^PG15)</text>
+  </g>
+
+  <!-- DIP Switch settings -->
+  <g id="dip-switches">
+    <text x="900" y="330" class="label-title">DM542T DIP SWITCHES</text>
+    <rect x="890" y="340" width="280" height="130" fill="#1a1a2e" stroke="#4a4a6a" rx="5"/>
+
+    <text x="910" y="365" class="label-small">MICROSTEPPING (SW5-SW8):</text>
+    <text x="910" y="385" class="label-small">X,X2,Y,Y1,E0,E1: 16 µsteps</text>
+    <text x="910" y="400" class="label-small">  → SW5=OFF, SW6=ON, SW7=ON, SW8=OFF</text>
+    <text x="910" y="420" class="label-small">Z, Z1: 4 µsteps</text>
+    <text x="910" y="435" class="label-small">  → SW5=ON, SW6=ON, SW7=OFF, SW8=OFF</text>
+    <text x="910" y="460" class="label-small">CURRENT (SW1-SW3): Set per motor specs</text>
+  </g>
+
+  <!-- System diagram -->
+  <g id="system-overview">
+    <text x="1040" y="510" text-anchor="middle" class="label-title">SYSTEM OVERVIEW</text>
+
+    <!-- Pi -->
+    <rect x="970" y="530" width="140" height="50" fill="#3d5a3d" stroke="#5a8a5a" rx="5"/>
+    <text x="1040" y="555" text-anchor="middle" class="label">Raspberry Pi</text>
+    <text x="1040" y="570" text-anchor="middle" class="label-small">FluiddPi</text>
+
+    <!-- Arrow -->
+    <text x="1040" y="600" text-anchor="middle" class="label-small">USB ↓</text>
+
+    <!-- Octopus -->
+    <rect x="970" y="610" width="140" height="50" fill="#3d3d5a" stroke="#5a5a8a" rx="5"/>
+    <text x="1040" y="635" text-anchor="middle" class="label">Octopus Pro</text>
+    <text x="1040" y="650" text-anchor="middle" class="label-small">Klipper MCU</text>
+
+    <!-- Arrow -->
+    <text x="1040" y="680" text-anchor="middle" class="label-small">Step/Dir/En ↓</text>
+
+    <!-- Drivers -->
+    <rect x="970" y="690" width="140" height="50" fill="#5a3d3d" stroke="#8a5a5a" rx="5"/>
+    <text x="1040" y="715" text-anchor="middle" class="label">DM542T x8</text>
+    <text x="1040" y="730" text-anchor="middle" class="label-small">External Drivers</text>
+
+    <!-- Arrow -->
+    <text x="1040" y="760" text-anchor="middle" class="label-small">4-wire ↓</text>
+
+    <!-- Motors -->
+    <rect x="970" y="770" width="140" height="50" fill="#5a5a3d" stroke="#8a8a5a" rx="5"/>
+    <text x="1040" y="795" text-anchor="middle" class="label">Stepper Motors</text>
+    <text x="1040" y="810" text-anchor="middle" class="label-small">NEMA 17/23</text>
+  </g>
+
+  <!-- Notes -->
+  <text x="520" y="810" class="note">Note: All GND connections can share a common ground wire daisy-chained between drivers.</text>
+  <text x="520" y="825" class="note">Ensure adequate wire gauge for motor power (14-16 AWG for power, 22-24 AWG for signals).</text>
+
+  <!-- Footer -->
+  <text x="600" y="880" text-anchor="middle" class="label-small">AON3D M2+ BTT Octopus Pro Conversion - Wiring Diagram v1.0</text>
+</svg>
--- a/docs/swap-checklist.md
+++ b/docs/swap-checklist.md
@@ -0,0 +1,142 @@
+# AON3D M2+ Controller Swap Checklist
+## Azteeg X3 → BTT Octopus Pro v1.0.1
+
+Since your DM542T drivers are already wired to the motors, you only need to move the **signal wires** from the Azteeg to the Octopus Pro.
+
+---
+
+## BEFORE YOU START
+
+- [ ] Power OFF everything
+- [ ] Take photos of current Azteeg wiring for reference
+- [ ] Label wires if not already labeled
+
+---
+
+## 1. MOTOR SIGNAL WIRES (Step/Dir/Enable from DM542T)
+
+Move the signal cables from each DM542T driver to the Octopus Pro motor headers.
+
+**Wiring per DM542T → Octopus:**
+```
+DM542T          Octopus MOTOR Header
+──────          ────────────────────
+PUL+ ─────────► Pin 2 (STEP)
+DIR+ ─────────► Pin 3 (DIR)
+ENA+ ─────────► Pin 4 (EN)
+PUL-/DIR-/ENA- ► Pin 1 (GND) - can share one GND wire
+```
+
+| DM542T Driver | From Azteeg | To Octopus Header |
+|---------------|-------------|-------------------|
+| X motor | Azteeg X | **MOTOR0** | ☐ |
+| X2 motor (IDEX) | Azteeg ? | **MOTOR1** | ☐ |
+| Y motor | Azteeg Y | **MOTOR2** | ☐ |
+| Y1 motor | Azteeg ? | **MOTOR3** | ☐ |
+| Z motor | Azteeg Z | **MOTOR4** | ☐ |
+| Z1 motor | Azteeg ? | **MOTOR5** | ☐ |
+| Extruder 0 | Azteeg E0 | **MOTOR6** | ☐ |
+| Extruder 1 | Azteeg E1 | **MOTOR7** | ☐ |
+
+---
+
+## 2. ENDSTOPS
+
+Move endstop connectors from Azteeg to Octopus DIAG headers.
+
+| Endstop | To Octopus Header | Done |
+|---------|-------------------|------|
+| X min | **DIAG0** (PG6) | ☐ |
+| X2 / IDEX | **DIAG1** (PG9) | ☐ |
+| Y min | **DIAG2** (PG10) | ☐ |
+| Y1 (if used) | **DIAG3** (PG11) | ☐ |
+| Z min | **DIAG4** (PG12) | ☐ |
+| Z1 (if used) | **DIAG5** (PG13) | ☐ |
+
+---
+
+## 3. THERMISTORS
+
+Move thermistor connectors from Azteeg to Octopus.
+
+| Thermistor | To Octopus Header | Done |
+|------------|-------------------|------|
+| Extruder 0 | **T0** (PF4) | ☐ |
+| Extruder 1 | **T1** (PF5) | ☐ |
+| Chamber | **T2** (PF6) | ☐ |
+| Bed | **TB** (PF3) | ☐ |
+
+---
+
+## 4. HEATERS
+
+Move heater wires from Azteeg to Octopus.
+
+| Heater | To Octopus Header | Done |
+|--------|-------------------|------|
+| Hotend 0 | **HE0** (PA2) | ☐ |
+| Hotend 1 | **HE1** (PA3) | ☐ |
+| Chamber | **HE2** (PB10) | ☐ |
+| Bed | **HB** (PA1) | ☐ |
+
+---
+
+## 5. FANS
+
+| Fan | To Octopus Header | Done |
+|-----|-------------------|------|
+| Enclosure fan | **FAN2** (PD12) | ☐ |
+| Others (if any) | FAN0-5 as needed | ☐ |
+
+---
+
+## 6. PROBE
+
+| Component | To Octopus Header | Done |
+|-----------|-------------------|------|
+| Probe | **PROBE** (PG15) | ☐ |
+
+---
+
+## 7. POWER & COMMUNICATION
+
+| Connection | Done |
+|------------|------|
+| 24V power to Octopus VIN (+/-) | ☐ |
+| USB cable to Raspberry Pi | ☐ |
+
+---
+
+## 8. FINAL CHECKS
+
+- [ ] All connections secure
+- [ ] No loose wires
+- [ ] 24V polarity correct
+- [ ] USB connected to Pi
+
+---
+
+## 9. POWER ON SEQUENCE
+
+1. [ ] Power on Raspberry Pi first
+2. [ ] SSH in: `ssh pi@192.168.86.20`
+3. [ ] Power on 24V to printer
+4. [ ] Check serial: `ls /dev/serial/by-id/*`
+5. [ ] Copy the serial ID
+6. [ ] Update printer.cfg with serial ID
+7. [ ] Copy configs to Pi
+8. [ ] Restart Klipper
+
+---
+
+## QUICK PIN REFERENCE
+
+```
+MOTOR0 → X      MOTOR4 → Z      HE0 → Hotend 0    T0 → Extruder 0 temp
+MOTOR1 → X2     MOTOR5 → Z1     HE1 → Hotend 1    T1 → Extruder 1 temp
+MOTOR2 → Y      MOTOR6 → E0     HE2 → Chamber     T2 → Chamber temp
+MOTOR3 → Y1     MOTOR7 → E1     HB  → Bed         TB → Bed temp
+
+DIAG0 → X min   DIAG2 → Y min   DIAG4 → Z min     PROBE → Bed probe
+DIAG1 → X2      DIAG3 → Y1      DIAG5 → Z1        FAN2  → Enclosure
+```
--- a/docs/wiring-checklist.md
+++ b/docs/wiring-checklist.md
@@ -0,0 +1,336 @@
+# AON3D M2+ Wiring Checklist
+## BTT Octopus Pro v1.0.1
+
+Print this checklist and mark each connection as you complete it.
+
+---
+
+## PRE-WIRING CHECKS
+
+- [ ] Power supply OFF
+- [ ] All components laid out and identified
+- [ ] Wire labels/markers ready
+- [ ] Multimeter available for testing
+- [ ] Correct wire gauges prepared:
+  - [ ] 14-16 AWG for power
+  - [ ] 22-24 AWG for signals
+
+---
+
+## 1. POWER CONNECTIONS
+
+### Main Power
+| Connection | From | To | Done |
+|------------|------|-----|------|
+| 24V+ | PSU +24V | Octopus VIN+ | ☐ |
+| 24V- | PSU GND | Octopus VIN- | ☐ |
+
+### DM542T Driver Power (all 8 drivers)
+| Driver | V+ Connected | V- Connected |
+|--------|--------------|--------------|
+| DM542T #1 (X) | ☐ | ☐ |
+| DM542T #2 (X2) | ☐ | ☐ |
+| DM542T #3 (Y) | ☐ | ☐ |
+| DM542T #4 (Y1) | ☐ | ☐ |
+| DM542T #5 (Z) | ☐ | ☐ |
+| DM542T #6 (Z1) | ☐ | ☐ |
+| DM542T #7 (E0) | ☐ | ☐ |
+| DM542T #8 (E1) | ☐ | ☐ |
+
+---
+
+## 2. MOTOR SIGNAL CONNECTIONS
+
+### MOTOR0 → DM542T #1 → X Axis Motor
+| Signal | Octopus Pin | DM542T Terminal | Done |
+|--------|-------------|-----------------|------|
+| STEP | PF13 (pin 2) | PUL+ | ☐ |
+| DIR | PF12 (pin 3) | DIR+ | ☐ |
+| EN | PF14 (pin 4) | ENA+ | ☐ |
+| GND | GND (pin 1) | PUL-, DIR-, ENA- | ☐ |
+
+Motor wires to DM542T:
+- [ ] A+ connected
+- [ ] A- connected
+- [ ] B+ connected
+- [ ] B- connected
+
+---
+
+### MOTOR1 → DM542T #2 → X2 (Dual Carriage) Motor
+| Signal | Octopus Pin | DM542T Terminal | Done |
+|--------|-------------|-----------------|------|
+| STEP | PG0 (pin 2) | PUL+ | ☐ |
+| DIR | PG1 (pin 3) | DIR+ | ☐ |
+| EN | PF15 (pin 4) | ENA+ | ☐ |
+| GND | GND (pin 1) | PUL-, DIR-, ENA- | ☐ |
+
+Motor wires to DM542T:
+- [ ] A+ connected
+- [ ] A- connected
+- [ ] B+ connected
+- [ ] B- connected
+
+---
+
+### MOTOR2 → DM542T #3 → Y Axis Motor
+| Signal | Octopus Pin | DM542T Terminal | Done |
+|--------|-------------|-----------------|------|
+| STEP | PF11 (pin 2) | PUL+ | ☐ |
+| DIR | PG3 (pin 3) | DIR+ | ☐ |
+| EN | PG5 (pin 4) | ENA+ | ☐ |
+| GND | GND (pin 1) | PUL-, DIR-, ENA- | ☐ |
+
+Motor wires to DM542T:
+- [ ] A+ connected
+- [ ] A- connected
+- [ ] B+ connected
+- [ ] B- connected
+
+---
+
+### MOTOR3 → DM542T #4 → Y1 Axis Motor
+| Signal | Octopus Pin | DM542T Terminal | Done |
+|--------|-------------|-----------------|------|
+| STEP | PG4 (pin 2) | PUL+ | ☐ |
+| DIR | PC1 (pin 3) | DIR+ | ☐ |
+| EN | PA0 (pin 4) | ENA+ | ☐ |
+| GND | GND (pin 1) | PUL-, DIR-, ENA- | ☐ |
+
+Motor wires to DM542T:
+- [ ] A+ connected
+- [ ] A- connected
+- [ ] B+ connected
+- [ ] B- connected
+
+---
+
+### MOTOR4 → DM542T #5 → Z Axis Motor
+| Signal | Octopus Pin | DM542T Terminal | Done |
+|--------|-------------|-----------------|------|
+| STEP | PF9 (pin 2) | PUL+ | ☐ |
+| DIR | PF10 (pin 3) | DIR+ | ☐ |
+| EN | PG2 (pin 4) | ENA+ | ☐ |
+| GND | GND (pin 1) | PUL-, DIR-, ENA- | ☐ |
+
+Motor wires to DM542T:
+- [ ] A+ connected
+- [ ] A- connected
+- [ ] B+ connected
+- [ ] B- connected
+
+---
+
+### MOTOR5 → DM542T #6 → Z1 Axis Motor
+| Signal | Octopus Pin | DM542T Terminal | Done |
+|--------|-------------|-----------------|------|
+| STEP | PC13 (pin 2) | PUL+ | ☐ |
+| DIR | PF0 (pin 3) | DIR+ | ☐ |
+| EN | PF1 (pin 4) | ENA+ | ☐ |
+| GND | GND (pin 1) | PUL-, DIR-, ENA- | ☐ |
+
+Motor wires to DM542T:
+- [ ] A+ connected
+- [ ] A- connected
+- [ ] B+ connected
+- [ ] B- connected
+
+---
+
+### MOTOR6 → DM542T #7 → Extruder 0 Motor
+| Signal | Octopus Pin | DM542T Terminal | Done |
+|--------|-------------|-----------------|------|
+| STEP | PE2 (pin 2) | PUL+ | ☐ |
+| DIR | PE3 (pin 3) | DIR+ | ☐ |
+| EN | PD4 (pin 4) | ENA+ | ☐ |
+| GND | GND (pin 1) | PUL-, DIR-, ENA- | ☐ |
+
+Motor wires to DM542T:
+- [ ] A+ connected
+- [ ] A- connected
+- [ ] B+ connected
+- [ ] B- connected
+
+---
+
+### MOTOR7 → DM542T #8 → Extruder 1 Motor
+| Signal | Octopus Pin | DM542T Terminal | Done |
+|--------|-------------|-----------------|------|
+| STEP | PE6 (pin 2) | PUL+ | ☐ |
+| DIR | PA14 (pin 3) | DIR+ | ☐ |
+| EN | PE0 (pin 4) | ENA+ | ☐ |
+| GND | GND (pin 1) | PUL-, DIR-, ENA- | ☐ |
+
+Motor wires to DM542T:
+- [ ] A+ connected
+- [ ] A- connected
+- [ ] B+ connected
+- [ ] B- connected
+
+---
+
+## 3. DM542T DIP SWITCH SETTINGS
+
+| Driver | Axis | Microsteps | SW5 | SW6 | SW7 | SW8 | Set |
+|--------|------|------------|-----|-----|-----|-----|-----|
+| #1 | X | 16 | OFF | ON | ON | OFF | ☐ |
+| #2 | X2 | 16 | OFF | ON | ON | OFF | ☐ |
+| #3 | Y | 16 | OFF | ON | ON | OFF | ☐ |
+| #4 | Y1 | 16 | OFF | ON | ON | OFF | ☐ |
+| #5 | Z | 4 | ON | ON | OFF | OFF | ☐ |
+| #6 | Z1 | 4 | ON | ON | OFF | OFF | ☐ |
+| #7 | E0 | 16 | OFF | ON | ON | OFF | ☐ |
+| #8 | E1 | 16 | OFF | ON | ON | OFF | ☐ |
+
+Current settings (SW1-SW3): Set per your motor specifications
+- [ ] All current settings configured
+
+---
+
+## 4. ENDSTOP CONNECTIONS
+
+| Endstop | Octopus Header | Pin | Signal Wire | GND Wire |
+|---------|----------------|-----|-------------|----------|
+| X Min | DIAG0 | PG6 | ☐ | ☐ |
+| X2 (IDEX) | DIAG1 | PG9 | ☐ | ☐ |
+| Y Min | DIAG2 | PG10 | ☐ | ☐ |
+| Y1 (opt) | DIAG3 | PG11 | ☐ | ☐ |
+| Z Min | DIAG4 | PG12 | ☐ | ☐ |
+| Z1 (opt) | DIAG5 | PG13 | ☐ | ☐ |
+
+---
+
+## 5. PROBE CONNECTION
+
+| Component | Octopus Header | Connection | Done |
+|-----------|----------------|------------|------|
+| Probe Signal | PROBE | S pin | ☐ |
+| Probe GND | PROBE | G pin | ☐ |
+| Probe VCC (if needed) | PROBE | V pin | ☐ |
+
+---
+
+## 6. THERMISTOR CONNECTIONS
+
+| Thermistor | Octopus Header | Pin | Wire 1 | Wire 2 |
+|------------|----------------|-----|--------|--------|
+| Extruder 0 | T0 | PF4 | ☐ | ☐ |
+| Extruder 1 | T1 | PF5 | ☐ | ☐ |
+| Chamber | T2 | PF6 | ☐ | ☐ |
+| Bed | TB | PF3 | ☐ | ☐ |
+
+---
+
+## 7. HEATER CONNECTIONS
+
+| Heater | Octopus Header | Pin | + Wire | - Wire |
+|--------|----------------|-----|--------|--------|
+| Hotend 0 | HE0 | PA2 | ☐ | ☐ |
+| Hotend 1 | HE1 | PA3 | ☐ | ☐ |
+| Chamber | HE2 | PB10 | ☐ | ☐ |
+| Bed | HB | PA1 | ☐ | ☐ |
+
+**Note for Bed**: If using SSR, connect SSR control to HB output
+- [ ] SSR used (if applicable)
+- [ ] SSR control wiring correct
+- [ ] SSR load wiring correct
+
+---
+
+## 8. FAN CONNECTIONS
+
+| Fan | Octopus Header | Pin | + Wire | - Wire |
+|-----|----------------|-----|--------|--------|
+| Enclosure Fan | FAN2 | PD12 | ☐ | ☐ |
+| Part Cooling 0 (opt) | FAN0 | PA8 | ☐ | ☐ |
+| Part Cooling 1 (opt) | FAN1 | PE5 | ☐ | ☐ |
+| Hotend Fan 0 (opt) | FAN3 | PD13 | ☐ | ☐ |
+| Hotend Fan 1 (opt) | FAN4 | PE4 | ☐ | ☐ |
+
+---
+
+## 9. COMMUNICATION
+
+| Connection | Done |
+|------------|------|
+| USB cable from Octopus to Raspberry Pi | ☐ |
+
+---
+
+## 10. PRE-POWER-ON VERIFICATION
+
+### Visual Inspection
+- [ ] No exposed wire strands touching other terminals
+- [ ] All screw terminals tight
+- [ ] No pinched wires
+- [ ] Polarity correct on all power connections
+
+### Multimeter Checks
+- [ ] No short between 24V+ and GND on Octopus
+- [ ] No short between V+ and V- on any DM542T
+- [ ] Continuity on all signal wires (disconnected from board)
+
+---
+
+## 11. FIRST POWER-ON SEQUENCE
+
+### Step 1: Octopus Pro Only (no motor power)
+- [ ] Connect USB to Pi
+- [ ] Power on 24V supply to Octopus
+- [ ] Octopus LEDs illuminate
+- [ ] No smoke or burning smell
+- [ ] Run `ls /dev/serial/by-id/*` on Pi - device appears
+
+### Step 2: Flash Klipper Firmware
+- [ ] Build Klipper for STM32F446
+- [ ] Copy firmware.bin to SD card
+- [ ] Flash Octopus Pro
+- [ ] Verify serial device still present
+
+### Step 3: Start Klipper
+- [ ] Copy printer.cfg and macros.cfg to Pi
+- [ ] Update serial port in printer.cfg
+- [ ] Start/restart Klipper
+- [ ] No errors in Klipper log
+- [ ] Fluidd connects successfully
+
+### Step 4: Test Without Motor Power
+- [ ] `QUERY_ENDSTOPS` - all show correct state
+- [ ] Temperature readings appear (room temp)
+- [ ] No heater errors
+
+### Step 5: Motor Power On
+- [ ] Power on DM542T power supply
+- [ ] All DM542T LEDs illuminate
+- [ ] Test single axis movement at low speed
+- [ ] Verify direction (invert DIR pin if wrong)
+
+### Step 6: Full System Test
+- [ ] All axes move correctly
+- [ ] Both extruders work
+- [ ] Homing works on all axes
+- [ ] IDEX tool change (T0/T1) works
+- [ ] Heaters respond (test at low temp first)
+- [ ] Fans operate
+
+---
+
+## NOTES
+
+_Use this space for any notes during wiring:_
+
+```
+
+
+
+
+```
+
+---
+
+## COMPLETION
+
+- [ ] All connections verified
+- [ ] System tested and operational
+- [ ] Date completed: _______________
+- [ ] Signed off by: _______________
--- a/docs/wiring-instructions.md
+++ b/docs/wiring-instructions.md
@@ -0,0 +1,534 @@
+# AON3D M2+ Wiring Instructions
+## BTT Octopus Pro v1.0.1 with External DM542T Drivers
+
+---
+
+## Overview
+
+This guide covers wiring your AON3D M2+ IDEX printer with:
+- **Controller**: BTT Octopus Pro v1.0.1
+- **Stepper Drivers**: External DM542T (8 units)
+- **Host**: Raspberry Pi 4/5 running FluiddPi
+
+### Total Connections Required
+
+| Category | Count | Items |
+|----------|-------|-------|
+| Motor Drivers | 8 | X, X2, Y, Y1, Z, Z1, E0, E1 |
+| Endstops | 4-6 | X-min, X-max, Y-min, (Y-max), Z-min, (Z-max) |
+| Thermistors | 4 | Extruder 0, Extruder 1, Bed, Chamber |
+| Heaters | 4 | Extruder 0, Extruder 1, Bed, Chamber |
+| Fans | 1+ | Enclosure fan (+ optional part cooling) |
+| Probe | 1 | Bed probe |
+| Power | 2 | 24V main, USB to Pi |
+
+---
+
+## PART 1: Power Supply Connections
+
+### 1.1 Main Power Input (24V DC)
+
+Connect your 24V power supply to the Octopus Pro:
+
+```
+Power Supply              Octopus Pro
+============              ===========
+24V ─────────────────────► VIN (+)
+GND  ─────────────────────► VIN (-)
+```
+
+**Location**: Large screw terminals on the edge of the board labeled "POWER" or "VIN"
+
+**Wire Gauge**: Use 14-16 AWG for main power
+
+### 1.2 DM542T Driver Power
+
+Each DM542T driver needs its own power connection (typically 24-48V DC):
+
+```
+Power Supply              DM542T Driver
+============              =============
+24V to +48V ─────────────► V+ (or VCC)
+GND ──────────────────────► V- (or GND)
+```
+
+**Important**:
+- All DM542T drivers can share the same power supply
+- Use appropriately rated power supply (calculate total motor current)
+- Typical: 48V power supply for better high-speed performance
+
+---
+
+## PART 2: Stepper Motor Connections (DM542T Drivers)
+
+### 2.1 Understanding the Signal Flow
+
+```
+┌─────────────┐     Step/Dir/Enable     ┌─────────────┐     4-wire     ┌─────────────┐
+│  Octopus    │ ───────────────────────►│   DM542T    │───────────────►│   Stepper   │
+│    Pro      │    (low current)        │   Driver    │  (high current)│    Motor    │
+└─────────────┘                         └─────────────┘                └─────────────┘
+```
+
+### 2.2 Octopus Pro Motor Header Pinout
+
+Each MOTOR header on the Octopus Pro has this pinout:
+
+```
+    ┌───┬───┬───┬───┐
+    │ 1 │ 2 │ 3 │ 4 │
+    └───┴───┴───┴───┘
+      │   │   │   │
+      │   │   │   └── EN (Enable)
+      │   │   └────── DIR (Direction)
+      │   └────────── STEP (Step pulse)
+      └────────────── GND (Ground)
+```
+
+### 2.3 Motor-to-Driver Assignments
+
+| Octopus Header | Klipper Section | Function | STEP | DIR | EN |
+|----------------|-----------------|----------|------|-----|-----|
+| MOTOR0 | [stepper_x] | X Carriage 0 | PF13 | PF12 | PF14 |
+| MOTOR1 | [dual_carriage] | X Carriage 1 (IDEX) | PG0 | PG1 | PF15 |
+| MOTOR2 | [stepper_y] | Y Axis | PF11 | PG3 | PG5 |
+| MOTOR3 | [stepper_y1] | Y1 Axis (2nd motor) | PG4 | PC1 | PA0 |
+| MOTOR4 | [stepper_z] | Z Axis | PF9 | PF10 | PG2 |
+| MOTOR5 | [stepper_z1] | Z1 Axis (2nd motor) | PC13 | PF0 | PF1 |
+| MOTOR6 | [extruder] | Extruder 0 | PE2 | PE3 | PD4 |
+| MOTOR7 | [extruder1] | Extruder 1 | PE6 | PA14 | PE0 |
+
+### 2.4 Wiring Each DM542T Driver
+
+For **EACH** of the 8 motor drivers, make these connections:
+
+```
+Octopus Pro MOTOR Header          DM542T Driver
+============================      =============
+
+Pin 1 (GND) ──────────────────────► PUL- (Pulse negative)
+                              ├───► DIR- (Direction negative)
+                              └───► ENA- (Enable negative)
+
+Pin 2 (STEP) ─────────────────────► PUL+ (Pulse positive)
+
+Pin 3 (DIR) ──────────────────────► DIR+ (Direction positive)
+
+Pin 4 (EN) ───────────────────────► ENA+ (Enable positive)
+```
+
+**Visual Diagram**:
+```
+Octopus MOTOR0                           DM542T #1 (X Axis)
+┌─────────────┐                         ┌─────────────────┐
+│ GND  ●──────┼────────┬───────────────►│ PUL-            │
+│ STEP ●──────┼────────┼───────────────►│ PUL+            │
+│ DIR  ●──────┼────────┼───────────────►│ DIR+            │
+│ EN   ●──────┼────────┼───────────────►│ ENA+            │
+└─────────────┘        │               ┌┤ DIR-            │
+                       ├───────────────►│ ENA-            │
+                       │                │                 │
+                       │                │ A+  ●───────────┼──► Motor Coil A+
+                       │                │ A-  ●───────────┼──► Motor Coil A-
+                       │                │ B+  ●───────────┼──► Motor Coil B+
+                       │                │ B-  ●───────────┼──► Motor Coil B-
+                       │                │                 │
+                       │                │ V+  ●───────────┼──► +24-48V
+                       │                │ V-  ●───────────┼──► GND (Power)
+                       │                └─────────────────┘
+                       │
+                       └─── Common GND (can use single wire daisy-chained
+                            or individual wires to each driver)
+```
+
+### 2.5 Repeat for All 8 Drivers
+
+| # | Octopus Header | DM542T Label | Motor |
+|---|----------------|--------------|-------|
+| 1 | MOTOR0 | DM542T-X | X Carriage 0 |
+| 2 | MOTOR1 | DM542T-X2 | X Carriage 1 |
+| 3 | MOTOR2 | DM542T-Y | Y Motor |
+| 4 | MOTOR3 | DM542T-Y1 | Y1 Motor |
+| 5 | MOTOR4 | DM542T-Z | Z Motor |
+| 6 | MOTOR5 | DM542T-Z1 | Z1 Motor |
+| 7 | MOTOR6 | DM542T-E0 | Extruder 0 |
+| 8 | MOTOR7 | DM542T-E1 | Extruder 1 |
+
+### 2.6 DM542T DIP Switch Settings
+
+Set the DIP switches on each DM542T to match the Klipper config:
+
+**Microstepping** (SW5-SW8):
+
+| Axis | Microsteps | SW5 | SW6 | SW7 | SW8 |
+|------|------------|-----|-----|-----|-----|
+| X, X2, Y, Y1 | 16 | OFF | ON | ON | OFF |
+| Z, Z1 | 4 | ON | ON | OFF | OFF |
+| E0, E1 | 16 | OFF | ON | ON | OFF |
+
+**Current Settings** (SW1-SW3): Set according to your motor specs. Typical settings:
+- NEMA 23 motors: 2.0-3.0A
+- NEMA 17 extruders: 1.0-1.5A
+
+---
+
+## PART 3: Endstop Connections
+
+### 3.1 Endstop Pinout on Octopus Pro
+
+The DIAG/Endstop headers are 3-pin connectors:
+
+```
+    ┌───┬───┬───┐
+    │ S │ V │ G │
+    └───┴───┴───┘
+      │   │   │
+      │   │   └── GND (Ground)
+      │   └────── +5V (for powered sensors, optional)
+      └────────── Signal
+```
+
+### 3.2 Endstop Assignments
+
+| Endstop | Function | Octopus Header | Pin | Config |
+|---------|----------|----------------|-----|--------|
+| X Min | Home position Carriage 0 | DIAG0 | PG6 | `endstop_pin: PG6` |
+| X Max | Home position Carriage 1 | DIAG1 | PG9 | `endstop_pin: PG9` |
+| Y Min | Y home position | DIAG2 | PG10 | `endstop_pin: PG10` |
+| Y1 | Y1 endstop (optional) | DIAG3 | PG11 | `endstop_pin: PG11` |
+| Z Min | Z home position | DIAG4 | PG12 | `endstop_pin: PG12` |
+| Z1 | Z1 endstop (optional) | DIAG5 | PG13 | `endstop_pin: PG13` |
+
+### 3.3 Wiring Mechanical Endstops
+
+**Normally Open (NO) Switch** - most common:
+```
+Endstop Switch              Octopus Pro DIAG Header
+==============              =======================
+COM ──────────────────────► G (Ground)
+NO  ──────────────────────► S (Signal)
+```
+Config: `endstop_pin: PG6`
+
+**Normally Closed (NC) Switch** - add `!` to invert:
+```
+Endstop Switch              Octopus Pro DIAG Header
+==============              =======================
+COM ──────────────────────► G (Ground)
+NC  ──────────────────────► S (Signal)
+```
+Config: `endstop_pin: !PG6`
+
+### 3.4 Wiring Optical/Inductive Sensors (3-wire)
+
+```
+Sensor                      Octopus Pro DIAG Header
+======                      =======================
+VCC (Brown/Red) ──────────► V (+5V)
+GND (Blue/Black) ─────────► G (Ground)
+Signal (Black/Yellow) ────► S (Signal)
+```
+
+---
+
+## PART 4: Thermistor Connections
+
+### 4.1 Thermistor Header Pinout
+
+```
+    ┌───┬───┐
+    │ T │ G │
+    └───┴───┘
+      │   │
+      │   └── GND (Ground)
+      └────── Thermistor Signal
+```
+
+### 4.2 Thermistor Assignments
+
+| Sensor | Function | Octopus Header | Pin |
+|--------|----------|----------------|-----|
+| TH0 | Extruder 0 temperature | T0 | PF4 |
+| TH1 | Extruder 1 temperature | T1 | PF5 |
+| TH2 | Chamber temperature | T2 | PF6 |
+| TB | Bed temperature | TB | PF3 |
+
+### 4.3 Wiring Thermistors
+
+Thermistors are not polarized - either wire can go to either terminal:
+
+```
+Thermistor (2-wire)         Octopus Pro TH Header
+===================         =====================
+Wire 1 ───────────────────► T (Signal)
+Wire 2 ───────────────────► G (Ground)
+```
+
+**Important**: Your M2 uses custom thermistors with voltage-based calibration. The config already includes the correct `adc_temperature` definitions.
+
+---
+
+## PART 5: Heater Connections
+
+### 5.1 Heater Output Specifications
+
+| Output | Function | Pin | Max Current | Connector |
+|--------|----------|-----|-------------|-----------|
+| HE0 | Hotend 0 | PA2 | 5A | Screw terminal |
+| HE1 | Hotend 1 | PA3 | 5A | Screw terminal |
+| HE2 | Chamber heater | PB10 | 5A | Screw terminal |
+| HB | Heated bed | PA1 | 10A | Large screw terminal |
+
+### 5.2 Wiring Hotend Heaters (HE0, HE1)
+
+```
+Heater Cartridge            Octopus Pro HE0/HE1
+================            ===================
+Wire 1 ───────────────────► + (Positive terminal)
+Wire 2 ───────────────────► - (Negative terminal)
+```
+
+**Note**: Standard heater cartridges are not polarized.
+
+### 5.3 Wiring Chamber Heater (HE2)
+
+Same as hotend heaters:
+```
+Chamber Heater              Octopus Pro HE2
+==============              ===============
+Wire 1 ───────────────────► +
+Wire 2 ───────────────────► -
+```
+
+### 5.4 Wiring Heated Bed (HB)
+
+**For beds drawing less than 10A** - connect directly:
+```
+Heated Bed                  Octopus Pro HB
+==========                  ==============
+Wire 1 ───────────────────► + (Positive)
+Wire 2 ───────────────────► - (Negative)
+```
+
+**For high-power beds (>10A)** - use SSR (Solid State Relay):
+```
+Octopus Pro HB              SSR                    Heated Bed
+==============              ===                    ==========
+ ────────────────────────► DC+ (Control)
+- ────────────────────────► DC- (Control)
+
+                            AC/DC+ (Load) ────────► Bed +
+                            AC/DC- (Load) ◄────────┤
+                                                   │
+Power Supply (+) ──────────────────────────────────┘
+Power Supply (-) ─────────────────────────────────► Bed -
+```
+
+---
+
+## PART 6: Fan Connections
+
+### 6.1 Fan Header Pinout
+
+```
+    ┌───┬───┐
+    │ + │ - │
+    └───┴───┘
+      │   │
+      │   └── GND (Negative)
+      └────── +24V PWM (Positive, controlled)
+```
+
+### 6.2 Fan Assignments
+
+| Fan | Function | Pin | Header |
+|-----|----------|-----|--------|
+| FAN0 | Part cooling 0 (optional) | PA8 | FAN0 |
+| FAN1 | Part cooling 1 (optional) | PE5 | FAN1 |
+| FAN2 | Enclosure/Chamber fan | PD12 | FAN2 |
+| FAN3 | Hotend fan 0 (optional) | PD13 | FAN3 |
+| FAN4 | Hotend fan 1 (optional) | PE4 | FAN4 |
+
+### 6.3 Wiring Fans
+
+```
+Fan (2-wire)                Octopus Pro FAN Header
+============                ======================
+ (Red) ──────────────────► + (Positive/PWM)
+- (Black) ────────────────► - (Ground)
+```
+
+**Enclosure Fan** (configured in Klipper):
+- Connected to FAN2
+- Controlled by chamber heater temperature
+
+---
+
+## PART 7: Probe Connection
+
+### 7.1 Probe Wiring
+
+Your probe connects to the dedicated PROBE header:
+
+**For mechanical probe (2-wire)**:
+```
+Probe Switch                Octopus Pro PROBE
+============                =================
+COM ──────────────────────► G (Ground)
+NO/NC ────────────────────► S (Signal)
+```
+
+**For inductive/capacitive probe (3-wire)**:
+```
+Probe Sensor                Octopus Pro PROBE
+============                =================
+VCC ──────────────────────► V (+5V or +24V depending on sensor)
+GND ──────────────────────► G (Ground)
+Signal ───────────────────► S (Signal)
+```
+
+Config: `pin: ^PG15` (the `^` enables internal pull-up)
+
+---
+
+## PART 8: Communication Connections
+
+### 8.1 USB to Raspberry Pi
+
+Connect the Octopus Pro to your Raspberry Pi via USB:
+
+```
+Octopus Pro                 Raspberry Pi
+===========                 ============
+USB-C port ◄───────────────► USB port (any)
+```
+
+Use a quality USB cable - data + power capable.
+
+### 8.2 Finding the Serial Port
+
+After connecting, run on the Pi:
+```bash
+ls /dev/serial/by-id/*
+```
+
+You should see something like:
+```
+/dev/serial/by-id/usb-Klipper_stm32f446xx_XXXXXXXXXX-if00
+```
+
+Update `printer.cfg` with this path.
+
+---
+
+## PART 9: Complete Wiring Checklist
+
+### Power
+- [ ] 24V power supply connected to Octopus Pro VIN
+- [ ] 24-48V power supply connected to all DM542T drivers
+- [ ] USB cable from Octopus Pro to Raspberry Pi
+
+### Motors (8 total)
+- [ ] MOTOR0 → DM542T → X motor (Carriage 0)
+- [ ] MOTOR1 → DM542T → X2 motor (Carriage 1/IDEX)
+- [ ] MOTOR2 → DM542T → Y motor
+- [ ] MOTOR3 → DM542T → Y1 motor
+- [ ] MOTOR4 → DM542T → Z motor
+- [ ] MOTOR5 → DM542T → Z1 motor
+- [ ] MOTOR6 → DM542T → Extruder 0 motor
+- [ ] MOTOR7 → DM542T → Extruder 1 motor
+
+### Endstops
+- [ ] X endstop → DIAG0
+- [ ] X2/Dual carriage endstop → DIAG1
+- [ ] Y endstop → DIAG2
+- [ ] Y1 endstop → DIAG3 (if used)
+- [ ] Z endstop → DIAG4
+- [ ] Z1 endstop → DIAG5 (if used)
+
+### Thermistors
+- [ ] Extruder 0 thermistor → T0
+- [ ] Extruder 1 thermistor → T1
+- [ ] Chamber thermistor → T2
+- [ ] Bed thermistor → TB
+
+### Heaters
+- [ ] Extruder 0 heater → HE0
+- [ ] Extruder 1 heater → HE1
+- [ ] Chamber heater → HE2
+- [ ] Heated bed → HB (or via SSR)
+
+### Fans
+- [ ] Enclosure fan → FAN2
+
+### Probe
+- [ ] Bed probe → PROBE header
+
+---
+
+## PART 10: First Power-On Procedure
+
+### Before Applying Power
+1. Double-check all wiring against this guide
+2. Verify no short circuits (use multimeter)
+3. Ensure DM542T DIP switches are set correctly
+4. Confirm power supply voltages are correct
+
+### Power-On Sequence
+1. **DO NOT** connect motors yet (just signals)
+2. Power on the Octopus Pro only
+3. Verify it appears on USB (`ls /dev/serial/by-id/`)
+4. Flash Klipper firmware (see below)
+5. Start Klipper and check for errors
+6. Test endstops: `QUERY_ENDSTOPS`
+7. Test thermistors: check temperatures in Fluidd
+8. **Then** connect motor power and test movement
+
+### Flashing Klipper Firmware
+
+```bash
+cd ~/klipper
+make menuconfig
+```
+
+Settings for Octopus Pro v1.0.1:
+- Micro-controller: **STMicroelectronics STM32**
+- Processor model: **STM32F446**
+- Bootloader offset: **32KiB bootloader**
+- Clock Reference: **12 MHz crystal**
+- Communication: **USB (on PA11/PA12)**
+
+```bash
+make clean
+make
+```
+
+Copy `out/klipper.bin` to SD card as `firmware.bin`, insert into Octopus, power cycle.
+
+---
+
+## Troubleshooting
+
+### Motor doesn't move
+1. Check DM542T has power (LED on?)
+2. Verify step/dir/enable wiring
+3. Check DIP switch settings
+4. Try inverting enable pin: `enable_pin: PF14` → `enable_pin: !PF14`
+
+### Motor moves wrong direction
+- Invert the DIR pin in config: `dir_pin: PF12` → `dir_pin: !PF12`
+
+### Endstop always triggered or never triggers
+- Check `QUERY_ENDSTOPS` output
+- Try inverting: `endstop_pin: PG6` → `endstop_pin: !PG6`
+- Verify wiring (NO vs NC switch)
+
+### Thermistor shows wrong temperature
+- Check wiring continuity
+- Verify correct `sensor_type` in config
+- The custom `adc_temperature` definitions should match your sensors
+
+### Heater doesn't heat
+- Check for "HEATER_ERROR" in Klipper logs
+- Verify heater wiring
+- Check thermistor is working (needs valid temp reading)
--- a/docs/wiring.md
+++ b/docs/wiring.md
@@ -0,0 +1,204 @@
+# AON3D M2+ Wiring Guide - BTT Octopus Pro v1.0.1
+
+## Motor Driver Connections (External DM542T)
+
+Since you're using external DM542T drivers, only **STEP**, **DIR**, and **ENABLE** signals are needed from the Octopus Pro. The drivers handle their own current and microstepping via DIP switches.
+
+### Motor Pin Assignments
+
+| Motor | Function | Octopus Header | STEP Pin | DIR Pin | ENABLE Pin |
+|-------|----------|----------------|----------|---------|------------|
+| MOTOR0 | X Axis (Carriage 0) | MOTOR0 | PF13 | PF12 | PF14 |
+| MOTOR1 | X2 / Dual Carriage | MOTOR1 | PG0 | PG1 | PF15 |
+| MOTOR2 | Y Axis | MOTOR2 | PF11 | PG3 | PG5 |
+| MOTOR3 | Y1 Axis | MOTOR3 | PG4 | PC1 | PA0 |
+| MOTOR4 | Z Axis | MOTOR4 | PF9 | PF10 | PG2 |
+| MOTOR5 | Z1 Axis | MOTOR5 | PC13 | PF0 | PF1 |
+| MOTOR6 | Extruder 0 | MOTOR6 | PE2 | PE3 | PD4 |
+| MOTOR7 | Extruder 1 | MOTOR7 | PE6 | PA14 | PE0 |
+
+### DM542T Wiring per Motor
+
+```
+Octopus Pro Motor Header     DM542T Driver
+========================     =============
+STEP (pin 2) ───────────────► PUL+
+GND  (pin 1) ───────────────► PUL-
+
+DIR  (pin 3) ───────────────► DIR+
+GND  (pin 1) ───────────────► DIR-
+
+EN   (pin 4) ───────────────► ENA+
+GND  (pin 1) ───────────────► ENA-
+```
+
+**Note:** The Octopus Pro motor headers have a 4-pin connector:
+- Pin 1: GND
+- Pin 2: STEP
+- Pin 3: DIR
+- Pin 4: EN (active low)
+
+---
+
+## Endstop Connections
+
+| Endstop | Function | Octopus Pin | Header |
+|---------|----------|-------------|--------|
+| DIAG0 | X Min (Carriage 0) | PG6 | DIAG0 |
+| DIAG1 | X Max (Dual Carriage) | PG9 | DIAG1 |
+| DIAG2 | Y Min | PG10 | DIAG2 |
+| DIAG3 | Y1 (optional) | PG11 | DIAG3 |
+| DIAG4 | Z Min | PG12 | DIAG4 |
+| DIAG5 | Z1 (optional) | PG13 | DIAG5 |
+| Probe | Bed probe | PG15 | PROBE |
+
+### Endstop Wiring
+
+```
+Endstop Switch          Octopus Pro
+==============          ===========
+Signal ─────────────────► S (Signal)
+GND ────────────────────► G (Ground)
+(VCC optional) ─────────► V (+5V for powered sensors)
+```
+
+---
+
+## Heater Connections
+
+| Heater | Function | Octopus Pin | Header | Max Current |
+|--------|----------|-------------|--------|-------------|
+| HE0 | Extruder 0 Hotend | PA2 | HE0 | 5A |
+| HE1 | Extruder 1 Hotend | PA3 | HE1 | 5A |
+| HE2 | Chamber Heater | PB10 | HE2 | 5A |
+| HB | Heated Bed | PA1 | HB | 10A (use SSR for high power beds) |
+
+**Important:** For high-power heated beds (>10A), use a Solid State Relay (SSR) controlled by the HB output.
+
+---
+
+## Thermistor Connections
+
+| Sensor | Function | Octopus Pin | Header |
+|--------|----------|-------------|--------|
+| T0 | Extruder 0 Temperature | PF4 | TH0 |
+| T1 | Extruder 1 Temperature | PF5 | TH1 |
+| T2 | Chamber Temperature | PF6 | TH2 |
+| TB | Bed Temperature | PF3 | TB |
+
+### Thermistor Wiring
+
+```
+Thermistor              Octopus Pro
+==========              ===========
+Wire 1 ─────────────────► T (Thermistor signal)
+Wire 2 ─────────────────► G (Ground)
+```
+
+---
+
+## Fan Connections
+
+| Fan | Function | Octopus Pin | Header |
+|-----|----------|-------------|--------|
+| FAN0 | Part Cooling (optional) | PA8 | FAN0 |
+| FAN1 | Part Cooling 2 (optional) | PE5 | FAN1 |
+| FAN2 | Chamber/Enclosure Fan | PD12 | FAN2 |
+| FAN3 | Hotend Fan 0 (optional) | PD13 | FAN3 |
+| FAN4 | Hotend Fan 1 (optional) | PE4 | FAN4 |
+
+---
+
+## Power Connections
+
+### Main Power Input
+- **VIN**: 24V DC (or your system voltage)
+- **GND**: Ground
+
+### Motor Power
+- The DM542T drivers have their own power input - connect them to your 24-48V power supply as per DM542T specifications.
+
+---
+
+## DM542T DIP Switch Settings
+
+Set the DIP switches on your DM542T drivers to match the Klipper configuration:
+
+### Microstepping (match `microsteps` in config)
+| Microsteps | SW5 | SW6 | SW7 | SW8 |
+|------------|-----|-----|-----|-----|
+| 16 (X,Y,E) | OFF | ON | ON | OFF |
+| 4 (Z axes) | ON | ON | OFF | OFF |
+
+### Current Setting (adjust for your motors)
+Refer to DM542T documentation for current settings based on your stepper motor specifications.
+
+---
+
+## Octopus Pro v1.0.1 Header Layout
+
+```
+┌─────────────────────────────────────────────────────────────┐
+│                    BTT OCTOPUS PRO v1.0.1                   │
+├─────────────────────────────────────────────────────────────┤
+│                                                             │
+│  [MOTOR0] [MOTOR1] [MOTOR2] [MOTOR3] [MOTOR4]              │
+│     X       X2       Y       Y1       Z                    │
+│                                                             │
+│  [MOTOR5] [MOTOR6] [MOTOR7]                                │
+│     Z1      E0       E1                                    │
+│                                                             │
+│  [HE0] [HE1] [HE2] [HB]    ← Heater outputs                │
+│                                                             │
+│  [TH0] [TH1] [TH2] [TB]    ← Thermistor inputs             │
+│                                                             │
+│  [FAN0-5]                   ← Fan outputs                  │
+│                                                             │
+│  [DIAG0-7]                  ← Endstop/diagnostic inputs    │
+│                                                             │
+│  [PROBE]                    ← Probe input                  │
+│                                                             │
+│  [USB] [POWER]                                             │
+│                                                             │
+└─────────────────────────────────────────────────────────────┘
+```
+
+---
+
+## Flashing Klipper to Octopus Pro
+
+1. SSH into your Raspberry Pi:
+   ```bash
+   ssh pi@192.168.86.20
+   ```
+
+2. Build Klipper firmware:
+   ```bash
+   cd ~/klipper
+   make menuconfig
+   ```
+
+3. Configure for Octopus Pro v1.0.1:
+   - Micro-controller: **STMicroelectronics STM32**
+   - Processor model: **STM32F446**
+   - Bootloader offset: **32KiB bootloader**
+   - Clock Reference: **12 MHz crystal**
+   - Communication interface: **USB (on PA11/PA12)**
+
+4. Build:
+   ```bash
+   make clean
+   make
+   ```
+
+5. Flash via SD card:
+   - Copy `out/klipper.bin` to SD card as `firmware.bin`
+   - Insert SD card into Octopus Pro
+   - Power cycle the board
+
+6. Find the serial port:
+   ```bash
+   ls /dev/serial/by-id/*
+   ```
+
+7. Update `printer.cfg` with the correct serial port.