Jdy40 Arduino Example — Best !link!

23 mA average during continuous transmission.

Transparent Serial, IO Control, and Remote Triggering. Default Baud Rate: 9600 bps. Wiring Guide jdy40 arduino example best

The JDY-40 supports AT commands. To change the baud rate or channel, connect the SET pin to 3.3V before powering up the module. Then you can send commands like AT+BAUD4 (for 115200) or AT+RFCH1 (for channel 1). 23 mA average during continuous transmission

The JDY-40 is an incredibly robust module when paired with good code. Unlike the nRF24L01, which requires complex SPI libraries and addresses, the JDY-40 feels like a piece of wire. Copy these examples, modify the packet structure for your own sensors (DHT22, DS18B20, or even GPS), and you will have the most reliable low-cost wireless link in your workshop. Wiring Guide The JDY-40 supports AT commands

No library. No complex config. It just works.