Best: Jdy40 Arduino Example

void setup() pinMode(ledPin, OUTPUT); Serial.begin(9600); jdy40.begin(9600); Serial.println("JDY-40 Receiver Ready");

void setup() Serial.begin(9600);

return false; // Retry or indicate failure jdy40 arduino example best

| Feature | JDY-40 | nRF24L01+ | HC-12 (433MHz) | | :--- | :--- | :--- | :--- | | | UART (Easy) | SPI (Complex Library) | UART (Easy) | | Max Range | 120m+ | 100m (with PA/LNA) | 1000m+ | | Frequency | 2.4 GHz | 2.4 GHz | 433 MHz | | Max Baud Rate | 19200 | 2 Mbps | 115200 | | Sleep Current | ~5uA | ~900nA | ~16mA | | Best Use Case | Simple wireless, remote control | High-speed data, complex networks | Long-range, outdoor, low-interference |

// Parse your data here if (receivedData.startsWith("TEMP:")) // Extract and act on data void setup() pinMode(ledPin, OUTPUT); Serial

This code reads a value from a potentiometer on analog pin A0 and sends it to the receiver once per second.

The JDY-40 turns a complex wireless link into a simple serial connection. Use 3.3V, match baud rates, and you’ll have two Arduinos talking in under 5 minutes. While the HC‑05 remains one of the most

While the HC‑05 remains one of the most popular Bluetooth modules for Arduino, the JDY‑40 offers several distinct advantages:

Connect the second JDY‑40 to a CP2102 USB dongle. Then: