RAK WisBlock core connector system uses 40-pin and 24-pin proprietary connectors for attaching LoRa, BLE, LTE, and sensor modules to base boards without soldering, enabling rapid IoT prototyping.
| Pin | Name | Function | Type |
|---|---|---|---|
| 1 | VDD | 3.3V supply | PWR |
| 2 | GND | Ground | GND |
| 3 | UART1_TX | UART1 transmit | BUS |
| 4 | UART1_RX | UART1 receive | BUS |
| 5 | I2C_SDA | I2C data | BUS |
| 6 | I2C_SCL | I2C clock | BUS |
| 7 | SPI_CLK | SPI clock | BUS |
| 8 | SPI_MOSI | SPI MOSI | BUS |
| 9 | SPI_MISO | SPI MISO | BUS |
| 10 | SPI_CS | SPI chip select | BUS |
| 11 | ANT | LoRa/BLE antenna | BUS |
| 12 | GPIO1 | General purpose I/O | I/O |