RAK WisBlock uses a proprietary 40-pin and 24-pin connector system for attaching sensor, wireless, and IO modules to base boards, enabling modular IoT device construction without soldering.
| Pin | Name | Function | Type |
|---|---|---|---|
| 1 | VDD | Supply voltage | PWR |
| 2 | GND | Ground | GND |
| 3 | SPI_CS | SPI chip select | BUS |
| 4 | SPI_CLK | SPI clock | BUS |
| 5 | SPI_MISO | SPI MISO | BUS |
| 6 | SPI_MOSI | SPI MOSI | BUS |
| 7 | SDA | I2C data | BUS |
| 8 | SCL | I2C clock | BUS |
| 9 | UART_TX | UART transmit | BUS |
| 10 | UART_RX | UART receive | BUS |