🔴 red: +3.3V
🟠 orange: +3.3V external for sensor
⚫ black: ground
🟣 purple: I2C port
🟢 green: 0-10V port
🟡 yellow: Modbus port
🔵 blue: Power supply
| Pin Name | Note |
|---|---|
| PA8 | Led YELLOW color |
| PA9 | Led RED color |
| PB2 | Led BLUE color |
| PA11 | I2C_SDA |
| PA12 | I2C_SCL |
| PB4 | Analog input 1 Range 0-10V |
| PA10 | Analog input 2 Range 0-10V |
| PB5 | Enable power 3.3V for sensor |
| PB6 | UART1_TX (RS485) |
| PB7 | UART1_TX (RS485) |
| PB3 | ADC Battery (ADC1) |