VMA322
V. 02 – 08/05/2019 3 ©Velleman nv
5. Overview
This module based on Nordic nRF24L01, highly integrated, ultra-low power (ULP) 2 Mbps RF transceiver for
the 2.4 GHz ISM (Industrial, Scientific and Medical) band. Nordic nRF24L01+ integrates a complete 2.4 GHz
RF transceiver, RF synthesizer, and baseband logic including the Enhanced ShockBurst™ hardware protocol
accelerator supporting a high-speed SPI interface for the application controller.
power supply: 1.9 to 3.6 V
IO port working voltage: 0-3.3 V
transmitting rate: +7 dB
receiving sensitivity: < 90 dB
transmission range: 250 m in open area
dimensions: 15 x 29 mm
6. Example
You will need two Arduino
®
boards and at least two RF modules, one to transmit and the other to receive. If
you use a standard Arduino
®
board, you should use the Arduino
®
board’s 3.3 V pin (VDD3V3) to provide power
(the nRF24L01 module has 1.9-3.6 V power voltage level). Please note: do not use 5 V pin (VDD5V) to provide
power as this may destroy the module.
Download the code below into the TX Arduino
®
(transmit). This code will drive the nRF24L01 module to send
out data form 0×00 to 0xFF.
// Code Begin
#include "NRF24L01.h"
//***************************************************
#define TX_ADR_WIDTH 5 // 5 unsigned chars TX(RX) address width
#define TX_PLOAD_WIDTH 32 // 32 unsigned chars TX payload
unsigned char TX_ADDRESS[TX_ADR_WIDTH] =
{
0x34,0x43,0x10,0x10,0x01
}; // Define a static TX address
unsigned char rx_buf[TX_PLOAD_WIDTH] = {0}; // initialize value
unsigned char tx_buf[TX_PLOAD_WIDTH] = {0};
//***************************************************
void setup()
{
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