Blue Button STM32F103RET6

⚠️ Work in progress. Depends on STM32F1 support in MicroPython.

MicroPython board definition files for the unbranded blue button STM32F103RET6 dev board.

Brand: Unbranded/Generic

Markings: STM32°

You can buy one for around $7 USD on AliExpress

Build and deploy the firmware:

⚠️ Most likely does not work yet.

Clone the board definitions to your MicroPython ports/stm32/boards folder.

cd micropython/ports/stm32/boards
git clone https://github.com/mcauser/BLUE_BUTTON_F103RET6.git

Disconnect the board from USB
Set BOOT0 jumper to ON (BT0->3V3)
Connect the board via USB

cd micropython/ports/stm32
make BOARD=BLUE_BUTTON_F103RET6
make BOARD=BLUE_BUTTON_F103RET6 deploy

Disconnect the board from USB
Set BOOT0 jumper to OFF (BT0->GND)
Connect the board via USB

screen /dev/tty.usbmodem1422

Specifications:

STM32F103RET6 ARM Cortex M3
72MHz, 90 DMIPS / 1.25 DMIPS / MHz
2.0V - 3.6V operating voltage
8MHz system crystal
32.768KHz RTC crystal
2.54mm pitch pins
JTAG/SWD header
512 KByte Flash, 64 KByte SRAM
3x SPI, 5x USART, 2x I2S, 2x I2C
1x SDIO, 2x CAN
51 I/Os almost all 5V-tolerant
1x USB 2.0 FS
RTC battery CR1220
3x ADC (12-bit / 16-channel)
2x DAC (12-bit)
3x general timers, 1x advanced timers
3.3V LDO voltage regulator, max current 300mA
Micro USB for power and data
Blue user LED (PC13)
2x jumpers for bootloader selection
Reset button
2x15 side pins + 2x4 top pins
M3 mounting holes

Links:

STM32F103RE on st.com
Buy on AliExpress or search for "STM32F103RET6"
STM32F103RET6 schematics
STM32F103RET6 dimensions
STM32F103RET6 pcb top
STM32F103RET6 pcb bottom

License

Licensed under the MIT License.