: Adjusts transmit power (0 to 9). 9 is max (+12dBm).
: Sets transmit power (0 to 9). 9 is maximum power. Example: AT+POWE9 .
The JDY-40 is a 2.4GHz wireless transceiver module with a built-in microcontroller. Its superpower? You just send data via Serial (UART), and the other module receives it. jdy40 arduino example best
Serial.println("Waiting for Bluetooth data...");
: Mode Configuration Pin (Pull LOW for AT command mode, pull HIGH or leave floating for communication mode). : Adjusts transmit power (0 to 9)
The JDY-40 is a highly versatile, low-cost 2.4GHz wireless serial port transparent transmission module. It operates similarly to Bluetooth but uses a simpler, proprietary protocol, making it excellent for long-range, low-power Arduino projects.
Mastering the JDY-40 Wireless Module with Arduino: A Complete Guide 9 is maximum power
SoftwareSerial jdy40(4, 3);
2.2V to 3.6V (Note: 5V may damage the module; use a voltage regulator if needed).
Arduino (Allows the sketch to programmatically switch between AT mode and data mode). JDY-40 CS →right arrow
// Receiver Code // Connect JDY-40 SET pin to GND for Transparent Mode