NRF24L01 2.4GHz Wireless Transceiver Module

The NRF24L01 is a low-cost, low-power 2.4GHz RF transceiver module built around Nordic Semiconductor's nRF24L01+ chip. It communicates with a host microcontroller over SPI and supports data rates up to 2Mbps with a range of roughly 100m line-of-sight (shorter indoors, longer with the PA/LNA long-range variant). Widely used for point-to-point and mesh wireless links between Arduino, ESP32, ESP8266, STM32, and Raspberry Pi boards.

Specifications

• Chip: Nordic nRF24L01+
• Frequency: 2.4GHz ISM band, 125 channels
• Interface: SPI (up to 10Mbps SPI clock)
• Data rate: 250kbps / 1Mbps / 2Mbps (configurable)
• Operating voltage: 1.9V-3.6V (VCC) — do not connect VCC directly to a 5V board; use a 3.3V regulator/adapter board if your host is 5V-only
• Digital I/O pins (CE, CSN, SCK, MOSI, MISO, IRQ): 5V-tolerant on most breakout variants, but always confirm before wiring
• Range: ~100m open air (standard antenna); use the PA/LNA variant with external antenna for longer range

Common Uses

• Wireless sensor networks (temperature/humidity/soil nodes reporting to a central hub)
• Remote control (RC cars, robots, drones) over a low-latency wireless link
• Two-node or star-network chat/telemetry between multiple microcontrollers
• Wireless data logging where WiFi/Bluetooth range or power draw is unsuitable

Wiring Note

VCC is 3.3V only — most NRF24L01 module instability reports trace back to insufficient/noisy power, not a bad module. Add a 10-100µF capacitor across VCC/GND close to the module if you see connection dropouts, especially on a bare Arduino 3.3V pin (which has limited current). Our 3.3V Adapter Board for 24L01 Wireless Module is a drop-in fix for exactly this.