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Pinout

Note
  • This page lists the pinout of the FLY Tool-Lite 232 tool board after flashing Klipper firmware. The pin numbers are based on the product schematic.
  • UART/CS is the driver communication pin: it acts as UART when using TMC2209 and as chip select CS when using SPI drivers; the same pin is multiplexed.
  • EN is the enable pin. In Klipper configuration, it is typically active-low (with the ! prefix in enable_pin).
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Driver Pins​

DriverSTEPDIRENUART/CSEndstop
DRIVER0gpio24gpio23gpio29gpio25-

Heating​

FunctionPin
Extruder heatergpio6

Temperature Sensors​

FunctionPin
Extruder thermistorgpio28
Supported Thermistor Types

The thermistor port supports NTC thermistors (100K) by default. It is recommended to configure sensor_type as Generic 3950.

List of built-in sensor_type options directly supported by Klipper and their applicable scenarios: Thermistor Configuration Guide

K-type thermocouples, PT100, etc., require additional conversion chips and cannot be connected directly to the thermistor port.

Fans​

FunctionPin
Part cooling fangpio13
Heat sink cooling fangpio14

Accelerometer (SPI)​

The accelerometer uses software SPI and requires three separate signal pins to be specified:

SignalPin
CSgpio9
MOSIgpio11
MISOgpio8
SCLKgpio10

Probe and Endstops​

FunctionPin
Generic Input 0gpio17
Generic Input 1gpio20
Generic Input 2gpio16
Probe / Generic Inputgpio19
HV-IN / Generic Inputgpio22
BLTouch / Servo Controlgpio7

PWM​

PWM FunctionPin
BLTouch / Servo Controlgpio7
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