The nRF24L01 is a 2.4GHz wireless transceiver by Nordic Semiconductor, communicating via SPI. It supports data rates up to 2Mbps, 125 selectable channels, and 6 data pipes. Popular for remote control and multi-node sensor networks.
| Pin | Name | Function | Type |
|---|---|---|---|
| 1 | GND | Ground | GND |
| 2 | VCC | 1.9V–3.6V power | PWR |
| 3 | CE | Chip enable, RX/TX mode select | I/O |
| 4 | CSN | SPI chip select, active low | BUS |
| 5 | SCK | SPI clock | BUS |
| 6 | MOSI | SPI data to module | BUS |
| 7 | MISO | SPI data from module | BUS |
| 8 | IRQ | Interrupt, active low | I/O |