How to use microphone in order to listen DTMF sound?
JaneYu 2024-07-11 10:35:32 226 Views0 Replies How to use microphone in order to listen DTMF sound?
2025-07-24 15:20:04 JaneYu
You can connect a buzzer with SPK1 or SPK2, and use a function called playDTMF().
JaneYu 
DTMF Shield for Arduino DFR0308