RADIO FREQUENCY¶
Radio frequency (RF) module nRF24L01 is a low-power, low-cost 2.4GHz wireless transceiver suitable for short-range wireless communication. It supports multiple data rates and multi-channel operation, has strong anti-interference capabilities, and offers a longer transmission distance. Compared to Wifi, radio frequency features low latency, low power consumption, and is more suitable for applications requiring real-time data transmission.
Parameters¶
nRF24L01 Technical Specifications
| Parameter | Description |
|---|---|
| Frequency | 2.4 GHz ISM band |
| Data Rate | 250 kbps / 1 Mbps / 2 Mbps |
| Operating Voltage | 1.9V – 3.6V (Recommended: 3.3V) |
| Range | Approx. 10–100 meters (depends on antenna) |
| Interface | SPI protocol |
| RX Current | Approx. 12.3 mA |
| TX Current | Approx. 11.3 mA (0 dBm output) |
| Packet Size | 1 to 32 bytes |
| Address Width | 3 to 5 bytes |
| Features | Auto-ACK, Auto-Retransmit, Multichannel RX |
Wiring¶
| Pin | Name | Description |
|---|---|---|
| 1 | GND | Ground |
| 2 | VCC | Power supply (Recommended 3.3V, no 5V!) |
| 3 | CE | Chip Enable (mode control: TX/RX switch) |
| 4 | CSN | SPI Chip Select (active low) |
| 5 | SCK | SPI Clock Input |
| 6 | MOSI | Master Out Slave In |
| 7 | MISO | Master In Slave Out |
| 8 | IRQ | Interrupt Pin (optional) |
| ``` |