NRF24L01 with 2.4 GHz Wireless Module

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Product Link

NRF24L01 with 2.4 GHz Wireless ModuleOpenELAB

Introduction

The NRF24L01 is a highly integrated, ultra-low-power wireless transceiver module designed by Nordic Semiconductor. Operating in the 2.4 GHz ISM (Industrial, Scientific, and Medical) band, it enables wireless data communication between microcontroller-based devices such as Arduino, Raspberry Pi, and ESP modules. The NRF24L01 is particularly popular in applications such as remote control systems, sensor networks, and IoT projects, thanks to its cost-effectiveness and ease of use

Features

• Operates in the 2.4 GHz ISM band.

• Multi-channel capability with 125 selectable channels.

• Data rates of 250 Kbps, 1 Mbps, and 2 Mbps.

• Range up to 100 meters in open spaces without obstacles.

• Automatic packet handling, including auto-retransmission and auto-acknowledgment.

• Multiceiver function: can handle up to 6 data pipelines (addresses) simultaneously.

• SPI interface for easy integration with microcontrollers.

• Low power consumption (idle mode: 900nA).

• Onboard 32-byte FIFO buffers for TX and RX

Specifications

• Operating Voltage: 1.9V to 3.6V (3.3V is optimal).

• Frequency Range: 2.4 GHz to 2.525 GHz.

• Maximum Data Rate: 2 Mbps.

• Communication Channels: 125 selectable.

• Power Consumption:

  • TX at 0 dBm: 11.3 mA.

  • RX in receiving mode: 12.3 mA.

  • Power down mode: 900 nA.

• Range: Up to 100 meters (line of sight).

• Max Payload Size: 32 bytes per packet

Pinout

Pin	Function	Description
GND	Ground	Connect to system ground.
VCC	Power Supply	1.9V to 3.6V (3.3V recommended).
CE	Chip Enable	Controls TX/RX modes. High = active.
CSN	Chip Select	Active low. Controls SPI communication.
SCK	Serial Clock	Clock signal for SPI interface.
MOSI	Master Out Slave In	Data line for SPI communication (data input).
MISO	Master In Slave Out	Data line for SPI communication (data output).
IRQ	Interrupt Request	Signals when new data is available (optional)【29†source】【31†source】.

Dimensions

• Module Size: Approximately 15 mm x 29 mm.

• Compact and easy to integrate into a wide range of projects with space constraints【30†source】.

How to Use

To use the NRF24L01 module, connect it to a microcontroller (such as Arduino) via the SPI interface. Libraries like RF24 are available for Arduino, simplifying communication between devices. Typical usage involves:

1. Setting the module in either transmitter or receiver mode.

2. Sending or receiving data packets using the radio.write() and radio.read() functions.

3. Adjusting the module settings, such as data rate, power level, and channels, for optimal performance.

Example setup for Arduino:

• Connect the VCC to 3.3V and GND to ground.

• Use digital pins for CE, CSN, MOSI, MISO, and SCK connections.

• Implement code to configure the module and establish wireless communication

FAQ

How far can the NRF24L01 communicate?

In ideal conditions (line of sight and minimal interference), the range can reach up to 100 meters. Indoors or in cluttered environments, the range may be reduced due to interference and obstacles【27†source】.

What is the maximum data rate?

The NRF24L01 can achieve a maximum data rate of 2 Mbps. Lower data rates, such as 250 Kbps and 1 Mbps, can be used for longer range and better reliability

Can I use multiple NRF24L01 modules in one project?

Yes, the NRF24L01 supports a multiceiver function, allowing up to 6 devices to communicate with one receiver using different data pipelines

Why is my NRF24L01 module not working?

Common issues include insufficient power from the 3.3V line of your microcontroller or interference from nearby devices. Consider using a decoupling capacitor (10uF to 100uF) and an external 3.3V power supply