MySX board for STM32F103C8T6 "Blue pill"

The Chinese development boards are available from webshops like Ebay, AliExpress, Wish, Taobao, and many more.

Pin description

You can use mysx_stm32.h from MySX-boards-library

#define MYSX_D1         PA9   //  TX    MYSX_D1_DFM - Digital IO (USART TX (data from MCU)) 
#define MYSX_D2         PA10  //  RX    MYSX_D2_DTM - Digital IO (USART RX (data to MCU))
#define MYSX_D3         PB1   //  INT    MYSX_D3_INT - Digital IO (interrupt)
#define MYSX_D4         PA8   //  INT MYSX_D4_INT - Digital IO (interrupt)    
#define MYSX_D5         PB6   //  PWM MYSX_D5_PWM - Digital IO (PWM)
#define MYSX_D6         PB0   //  MYSX_D6_PWM - Digital IO (PWM)
// I2C 2
#define MYSX_D7         PB10  //  
#define MYSX_D8         PB11  //  

#define MYSX_D9         PA2   //  MYSX_D9_A3 - Digital IO (analog input)
#define MYSX_D10        PA3   //  MYSX_D10_A4 - Digital IO (analog input)

// SPI2
#define MYSX_D11        PB15  //  MYSX_D11_MOSI - Digital IO (SPI MOSI)
#define MYSX_D12        PB14  //  MYSX_D12_MISO - Digital IO (SPI MISO)
#define MYSX_D13        PB13  //  MYSX_D13_SCK - Digital IO (SPI SCK)
#define MYSX_D14        PB12  //  MYSX_D14_CS - Digital IO (also for SPI CS)

#define MYSX_D15        PA0   //  MYSX_A5 - Analog input
#define MYSX_D16        PA1   //  MYSX_A6 - Analog input

//LED pins
#define MYSX_LED_ERR    PB8   
#define MYSX_LED_RX     PB7   
#define MYSX_LED_TX     PB3   

Description

SPI1 for NRF24

SPI2 for W5100|W5500 module (MYSX_SPI)

I2C 2 (MYSX_I2C) SDA PB11 SCL PB10

Before begin call

Wire.setSDA(MYSX_SDA);

Wire.setSCL(MYSX_SCL);

Arduino_Core_STM32

Sketch files:

MySensors STM32 Cores branch

Ethernet on any SPI with STM32 Cores

MySensors Gateway with w5500 | w5100 | Serial adapter

Component list

See conponent list on GitHub