ssa

void setup() {
  Serial.begin(9600);  // Initialize the serial monitor
  Serial1.begin(9600); // Initialize Serial1 for HC-12 module
}

void loop() {
  if (Serial.available()) {
    String data = Serial.readString();   // Read a string from the serial monitor
    if (data.startsWith("AT")) {
      Serial1.print(data);                   // Send AT command to HC-12 module
    }
  }

  if (Serial1.available()) {
    String data = Serial1.readString();     // Read a string from HC-12 module
    Serial.println(data);                 // Print received string to the serial monitor
  }

  // Transmit a string every 5 seconds
      Serial1.print(69);  // Replace this with your desired string
      delay(5000);
      Serial.println("Sent");  // Print "Sent" in the serial monitor
}