Jdy40 Arduino Example Best Patched -

Send temperature every 60 seconds, then sleep the Arduino + JDY-40.

// Function to change the JDY-40's ID to the desired remote ID. void setRemoteID(int id) digitalWrite(2, LOW); // Enter AT mode delay(100); Serial.print("AT+RFID"); if (id < 10) Serial.print("00"); else if (id < 100) Serial.print("0"); Serial.println(id); // e.g., "AT+RFID001" delay(100); digitalWrite(2, HIGH); // Exit AT mode delay(50); jdy40 arduino example best

Open your Serial Monitor at with Both NL & CR enabled, then enter these commands: Test connection : Type AT -> Expected response: +OK Set Baud Rate : Type AT+BAUD4 -> Sets baud rate to 9600. Send temperature every 60 seconds, then sleep the

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Two modules must have same channel and baud rate to communicate.

This guide breaks down how to interface the JDY-40 module with an Arduino, configuring it via AT commands, and building a robust transceiver system. Why Choose the JDY-40 Module?