Pinout

Note

This page lists the pinout of the FLY-SHT36 V2 tool board after flashing Klipper firmware. The pin numbers are based on the product schematic.
UART/CS is the driver communication pin: used 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 usually active low (with ! prefix in enable_pin).

Driver Pins

Driver	STEP	DIR	EN	UART/CS	Endstop
DRIVER0	PB4	PB3	PA15	PB5	-

Heating

Function	Pin
Extruder Heater	PA8

Temperature Sensors

Function	Pin
Extruder Thermistor	PA3

Supported Thermistor Types

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

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

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

Fans

Function	Pin
Part Cooling Fan	PB11
Hotend Heat Sink Fan	PB10

Probe and Endstops

Function	Pin
Probe / Generic Input	PA1
X Endstop / Generic Input	PA2
BLTouch Control (control_pin)	PB1

RGB

Function	Pin
RGB / Neopixel	PB0

Accelerometer (SPI)

The accelerometer uses the tool board hardware SPI bus. Configure spi_bus: spi2 in the configuration; no need to configure MOSI/MISO/SCLK pins separately:

Signal	Pin
CS	PA9

[adxl345]
cs_pin: sht36v2:PA9
spi_bus: spi2

PWM

PWM Function	Pin
RGB / Neopixel	PB0
BLTouch Control (control_pin)	PB1

Driver Pins​

Heating​

Temperature Sensors​

Fans​

Probe and Endstops​

RGB​

Accelerometer (SPI)​

PWM​