M5Stack M5Stamp C3U Module (K122)
M5Stack M5Stamp C3U

Available from:


Install method:
USB to Serial

GPIO #Component
GPIO00 User
GPIO01 User
GPIO02 WS2812 1
GPIO03 User
GPIO04 User
GPIO05 User
GPIO06 User
GPIO07 User
GPIO08 User
GPIO09 Button 1
GPIO010 User
GPIO011 None
GPIO012 None
GPIO013 None
GPIO014 None
GPIO015 None
GPIO016 None
GPIO017 None
GPIO018 User
GPIO019 User
GPIO020 User
GPIO021 User
Configuration for ESP32-C3
{"NAME":"M5Stamp C3U","GPIO":[1,1,1376,1,1,1,1,1,1,32,1,0,0,0,0,0,0,0,1,1,1,1],"FLAG":0,"BASE":1}
Use code BLAKADDER17 when buying from shop.m5stack.com store for a 5% discount.

The C3U uses the ESP32-C3’s built-in USB Serial for program download.

Enter flash mode: Long press on the center button of the M5Stamp C3U when the power is off (G9)

Light controls are for the built-in SK6812 RGB LED.



Flash using Tasmota Web Installer and select Tasmota ESP32-C3 option.

For esptool.py download f.e. tasmota32c3.factory.bin and run esptool.py write_flash 0x0 tasmota32c3.factory.bin

To put ESP32-C3 in flash mode GPIO8 needs to be pulled high and GPIO9 pulled low. Some devices have that by default.