Example Code for Arduino-Voice Playback Trigger

Hardware Preparation

• DFRduino UNO x1
• IO expansion shield V7 x1

Software Preparation

• Arduino IDE V1.6.5 Click to Download Arduino IDE from Arduino

Wiring Diagram

Other Preparation Work

1. Press and hold the recording button, and the onboard microphone will pick up external voice signals to realize the recording function. Release the recording button or the recording time has reached 20 seconds, and the yellow LED on the board will go out to indicate the end of recording.
2. Press the play button to play the recorded voice clip. After the playback ends, the yellow LED on the board will go out.

Sample Code

int Play_pin = 2;
void setup() {
  pinMode(Play_pin, OUTPUT);
  digitalWrite(Play_pin, HIGH);
}

void loop() {
  digitalWrite(Play_pin, LOW); //Comment this sentence and the recording will not be played automatically
  delay(200);
  digitalWrite(Play_pin, HIGH);
  delay(20000);
}