This is a long-range version of the popular nRF24L01 RF module, enhanced with a Power Amplifier (PA) and Low Noise Amplifier (LNA) and an external SMA antenna for much greater communication distance.
 
Key Features
Frequency band: 2.4 GHz ISM (2.400–2.525 GHz)
Chipset: Nordic nRF24L01+
PA + LNA:
1. PA increases transmit power                                                                                                                2. LNA improves receiver sensitivity
Data rates: 250 kbps, 1 Mbps, 2 Mbps
Modulation: GFSK
Communication: SPI interface
Antenna: External SMA (usually 2–5 dBi or higher)

Power Requirements Operating Voltage: 3.3 V ONLY (Not 5 V tolerant) Current Consumption: TX (max power): ~115–130 mA RX: ~45 mA Use a stable 3.3 V regulator (AMS1117 alone is often not enough) and Add 10 µF + 0.1 µF capacitors near VCC & GND
 
Pin Configuration
 
Pin
Function
GND
Ground
VCC
3.3 V
CE
Chip Enable
CSN
SPI Chip Select
SCK
SPI Clock
MOSI
SPI Data In
MISO
SPI Data Out
IRQ
Interrupt (optional)
 
Compatible Microcontrollers
 
Arduino (UNO, Mega, Nano)  needs level-safe SPI & strong 3.3 V supply
ESP8266 / NodeMCU (recommended)
ESP32
STM32
Raspberry Pi
 
Common Applications
 
 
Long-range IoT sensor networks
Smart agriculture (soil, weather, irrigation)
Remote monitoring systems
Wireless data logging
Robot-to-robot communication
Industrial telemetry
 
Important Notes
 
 
Always connect the antenna before powering ON (to avoid PA damage)
Use 250 kbps for maximum range
Keep SPI wires short
Use RF24 / RF24Network libraries
 
Codes
1. Transmitter
 
#include <SPI.h>
#include <nRF24L01.h>
#include <RF24.h>
// CE, CSN pins
RF24 radio(9, 10);
// Address (must match receiver)
const byte address[6] = "00001";
void setup() {
  Serial.begin(9600);
  radio.begin();
  radio.setPALevel(RF24_PA_MAX);     // PA+LNA needs MAX
  radio.setDataRate(RF24_250KBPS);   // Long range
  radio.setChannel(108);             // Avoid WiFi noise
  radio.openWritingPipe(address);
  radio.stopListening();
  Serial.println("NRF24L01 TRANSMITTER READY");
}
void loop() {
  const char text[] = "Hello from Transmitter";
  bool sent = radio.write(&text, sizeof(text));
  if (sent) {
    Serial.println("Message sent successfully");
  } else {
    Serial.println("Message failed");
  }
  delay(1000);
}
 
2. Receiver
 
#include <SPI.h>
#include <nRF24L01.h>
#include <RF24.h>
// CE, CSN pins
RF24 radio(9, 10);
// Address (same as transmitter)
const byte address[6] = "00001";
void setup() {
  Serial.begin(9600);
  radio.begin();
  radio.setPALevel(RF24_PA_MAX);
  radio.setDataRate(RF24_250KBPS);
  radio.setChannel(108);
  radio.openReadingPipe(0, address);
  radio.startListening();
  Serial.println("NRF24L01 RECEIVER READY");
}
void loop() {
  if (radio.available()) {
    char text[32] = "";
    radio.read(&text, sizeof(text));
    Serial.print("Received: ");
    Serial.println(text);
  }
}