- 32bit Cortex-M3 MCU (STM32F103ZET6)
- Soldered A4988 stepper drivers
- WIFI slot layout matches ESP-01 layout
- Manufactured by cbd-3d?
- PL2303 USB to Serial (max baudrate seems to be 230400)
- Datasheet (Page 27)
- PB0: Beeper
- PD3: LED
- PG4: Capacitor? (Power LED turns off slowly if pin is set HIGH)
- PA9: Serial USB Communication?
- Install Arduino STM32
- Remove JP1 jumper and set SW1 jumper to USB mode
- Use stm32flash tool located in
Arduino_STM32/tools/..../stm32flash
./stm32flash -b 230400 -w generic_boot20_pd3.bin -v -g 0x0 <port>
- Trinamic Replacement Notes for replacing A4988 with TMC2208
- Soldering Video
- Replace C45 capacitor (100nF) with 0603 22nF 50V
- Replace R46 and R47 resistors (68mOhm) with 0603 150mOhm 0,5W