Jdy40 Arduino Example Best May 2026

The JDY-40 is a 2.4GHz RF transceiver module (similar to nRF24L01 but simpler) that operates as a transparent wireless serial bridge. Unlike Bluetooth, you don't need pairing; unlike WiFi, you don't need an IP address. You simply type on Serial on one end, and it appears on the other.

void loop() // Read from Serial Monitor (PC) if (Serial.available()) String data = Serial.readString(); jdy40.print(data); // Send wirelessly to receiver jdy40 arduino example best

jdy40.println(packet); // println adds newline as delimiter delay(5000); // Send every 5 seconds The JDY-40 is a 2

void setup() Serial.begin(9600); jdy40.begin(9600); you don't need pairing