Arduino Example Best - Jdy40

: Keep the onboard PCB antenna away from large metal objects or high-interference components like motors to maximize range. AT command list to change the communication channel or transmission power?

Pull for AT command mode; pull HIGH or leave floating for transparent communication mode. CS Chip Select / Sleep jdy40 arduino example best

Configuration pin. Pull LOW for AT command mode; pull HIGH or leave disconnected for transparent communication mode. : Keep the onboard PCB antenna away from

Chip select pin. Connect to GND to keep the module active. Wiring Diagram for Configuration (Software Serial) CS Chip Select / Sleep Configuration pin

void loop() buttonState = digitalRead(buttonPin);

Before writing code, it is essential to understand the hardware. The JDY-40 operates within a 2.2V to 3.6V range and features a transmission range of up to 120 meters in open space. Module Pin Configuration Description Power Supply 2.2V - 3.6V (Do not connect directly to 5V Arduino VCC) GND Connect to Arduino GND TXD Serial Transmit Connect to Arduino RX (Use logic level shifter if 5V) RXD Serial Receive Connect to Arduino TX (Use logic level shifter if 5V) SET Mode Configuration