Jdy40 Arduino Example Best -

The is an incredibly versatile and affordable 2.4GHz RF transceiver module, often preferred for creating wireless serial communication bridges, replacing wires in projects, or even acting as a simple remote control . Unlike Bluetooth modules, the JDY-40 acts more like a wireless UART bridge, making it excellent for point-to-point communication between two Arduino boards, or an Arduino and a PC.

To get the "best" results, this report recommends using the module in (Pass-through) with Hardware Serial where possible.

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

To safely connect a 5V Arduino to a 3.3V JDY-40, you use a voltage divider on the Arduino's TX line going to the JDY-40's RX. A simple solution is a resistor divider: a 2.2kΩ resistor between the 5V TX pin and the JDY-40's RX pin, and a 3.3kΩ resistor from the JDY-40's RX pin to GND. Alternatively, use a dedicated logic level converter.

To get the best results, use the SoftwareSerial library so you can keep the hardware serial port for debugging. The is an incredibly versatile and affordable 2

: Send AT+RFID12345678 -> Must match on both modules.

Once configured, (or pull it HIGH) and reboot the modules to enter transparent transmission mode. Best JDY-40 Arduino Example: Bidirectional Communication Transparent Serial, IO Control, and Remote Triggering

: Serial Data Output (Connects to Arduino RX / Software RX).