# BTT Octopus

![](/files/gt6lvEGylngD2hp0zCGE)

{% hint style="info" %}
Pin Wiring Sequence is Top to Bottom, Left to Right
{% endhint %}

<table><thead><tr><th width="155.33333333333331">Connector</th><th width="204">Device</th><th>Comments</th></tr></thead><tbody><tr><td>EXP1</td><td>LCD Display (EXP1)</td><td></td></tr><tr><td>EXP2</td><td>LCD Display (EXP2)</td><td></td></tr><tr><td>TFT</td><td>LCD Display (RS-232)</td><td></td></tr><tr><td>MOTOR0</td><td>X Motor</td><td></td></tr><tr><td>MOTOR1</td><td>Y Motor</td><td></td></tr><tr><td>MOTOR2</td><td>Z Motor</td><td></td></tr><tr><td>MOTOR4</td><td>E Motor</td><td></td></tr><tr><td>FAN0</td><td>24v Layer Fan</td><td>Pins: + - | Jump bottom row header pins</td></tr><tr><td>FAN1</td><td>24v Extruder Fan</td><td>Pins: + - | Jump bottom row header pins</td></tr><tr><td>FAN2</td><td>24v Chamber Fan</td><td>Pins: + - | Jump bottom row header pins</td></tr><tr><td>FAN6</td><td>12v Controller Cooling</td><td>Pins: + - | Jump middle row header pins</td></tr><tr><td>FAN7</td><td>12v Enclosure Light</td><td>Pins: + - | Jump middle row header pins</td></tr><tr><td>HE0</td><td>24v Cartridge Heater</td><td>No polarity</td></tr><tr><td>HE2</td><td>24v Chamber Heater</td><td>Pins: + - | Solid state relay</td></tr><tr><td>STOP0</td><td>X Limit Switch</td><td>Pins: 3.3v GND Signal | 3.3v not used</td></tr><tr><td>STOP1</td><td>Y Limit Switch</td><td>Pins: 3.3v GND Signal | 3.3v not used</td></tr><tr><td>BL Touch</td><td>BL Touch</td><td>Pins: GND 5v Y-Signal | GND W-Signal</td></tr><tr><td>TB</td><td>Bed Thermistor</td><td>No polarity</td></tr><tr><td>T0</td><td>Hotend Thermistor</td><td>No polarity</td></tr><tr><td>T2</td><td>Chamber Thermistor</td><td>No polarity</td></tr></tbody></table>

### BTT Octopus Setup Guides

* [Octopus Setup Guide](https://www.makenprint.uk/3d-printing/3d-printing-guides/3d-printer-mainboard-installation-guides/btt-octopus-guides/btt-octopus-setup-guide/)
* [Wiring and Marlin Setup Guide](https://3dwork.io/en/btt-octopus/)
* [Sensorless Guide](https://3dwork.qitec.net/guias-impresion-3d/mejoras-upgrades/nivelacion/sensorless-homing-en-marlin)
* [Neopixel Guide](https://3dwork.qitec.net/guias-impresion-3d/mejoras-upgrades/otras-mejoras/leds-neopixel)

#### User Guide

{% file src="/files/nMYVyldtODsgtqY8L96s" %}
BTT Octopus User Guide
{% endfile %}


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