NRF24L01+(Compatible)+PA+LNA, UFL, PCB Antenna 2.4GHz Wireless Module GT-24

📌 Code Examples & Usage – nRF24L01+ PA+LNA Wireless Module (2.4GHz)
📋 Overview

This nRF24L01+ compatible PA+LNA module is a 2.4GHz wireless transceiver designed for longer range than the standard nRF24L01 modules, thanks to:

PA (Power Amplifier) for stronger transmit power

LNA (Low Noise Amplifier) for improved receive sensitivity

Antenna options: U.FL or PCB antenna (depending on version)

Ideal for:

Wireless sensor nodes

Remote controls

Telemetry links

Arduino / ESP projects

Low-cost point-to-point communication

📌 These modules use the nRF24 protocol (not Wi-Fi / Bluetooth).

⚙ Key Features

Frequency: 2.4 GHz

Interface: SPI

Voltage: 3.3V only

PA+LNA version for improved range

Supports multiple channels & addresses

Compatible with popular RF24 Arduino libraries

⚠ IMPORTANT – Power Requirements (READ FIRST)

🚨 This module MUST be powered from a stable 3.3V supply

The PA+LNA version draws higher current than normal nRF24 modules. USB/Arduino 3.3V pins are often not strong or stable enough.

✅ Strongly recommended:

A dedicated 3.3V regulator module (AMS1117 or buck converter)

A large decoupling capacitor placed near the module:

10µF + 0.1µF, or even 47–220µF electrolytic across 3.3V/GND

Most “it doesn’t work / range is bad” issues are power related.

🔌 Pinout (SPI)
nRF24L01 Pin Function
VCC 3.3V
GND Ground
CE Chip Enable
CSN SPI Chip Select
SCK SPI Clock
MOSI SPI MOSI
MISO SPI MISO
IRQ Interrupt (optional)
🔌 Wiring – Arduino Uno / Nano
nRF24L01 Arduino Uno
VCC 3.3V regulator output (NOT Uno 3.3V pin recommended)
GND GND
CE D9
CSN D10
SCK D13
MOSI D11
MISO D12

📌 Add a capacitor across VCC ↔ GND near the module.

🔌 Wiring – ESP32 (Recommended)
nRF24L01 ESP32
VCC 3.3V (stable)
GND GND
CE GPIO27
CSN GPIO5
SCK GPIO18
MOSI GPIO23
MISO GPIO19
📦 Library Installation (Arduino IDE)

Install the RF24 library:

Arduino IDE → Library Manager
Search: RF24 (by TMRh20) → Install

🧪 Example 1️⃣ – Simple One-Way Radio Link (TX + RX)
✅ Receiver Sketch (RX)
#include
#include

RF24 radio(9, 10); // CE, CSN
const byte address[6] = “AUS01”;

void setup() {
Serial.begin(9600);
radio.begin();
radio.openReadingPipe(0, address);
radio.setPALevel(RF24_PA_LOW); // Start low, increase if stable
radio.setDataRate(RF24_250KBPS); // Best range/reliability
radio.startListening();
}

void loop() {
if (radio.available()) {
char text[32] = {0};
radio.read(&text, sizeof(text));
Serial.print(“Received: “);
Serial.println(text);
}
}

✅ Transmitter Sketch (TX)
#include
#include

RF24 radio(9, 10); // CE, CSN
const byte address[6] = “AUS01”;

void setup() {
Serial.begin(9600);
radio.begin();
radio.openWritingPipe(address);
radio.setPALevel(RF24_PA_LOW); // Start low, increase if stable
radio.setDataRate(RF24_250KBPS); // Best range/reliability
radio.stopListening();
}

void loop() {
const char text[] = “Hello AuscomTech”;
radio.write(&text, sizeof(text));
Serial.println(“Sent”);
delay(1000);
}

📶 Recommended Radio Settings (Range & Stability)

For PA+LNA modules, these settings usually work best:

radio.setDataRate(RF24_250KBPS); ✅ (best range)

Start with radio.setPALevel(RF24_PA_LOW);

If stable, try RF24_PA_HIGH or RF24_PA_MAX

📌 If you get random dropouts at PA_MAX, it’s almost always power supply sag.

🔧 Common Issues & Fixes
Issue Likely Cause Fix
Not detected / no data Wrong wiring Check CE/CSN + SPI pins
Works up close only Low power / bad antenna Better 3.3V supply + capacitor
Random resets / dropouts Power dips Use regulator + 47–220µF cap
ESP32 conflicts SPI pins wrong Use VSPI defaults shown above

Additional information

Weight	40 g
Dimensions	260 × 160 × 20 mm