I have project to do with WiFi and MP3, so I refer to
https://tutorial.cytron.io/2016/12/01/e ... nt-1882749
But I am using Cytron UNO, so I change line 20 from if(!mp3.begin(Serial2)) to if(!mp3.begin(8, 9)).
As I follow the tutorial, the APP can connect but once it send data, UNO side cannot received.
Then I start testing by commenting some codes, found out that if I commented MP3 related code, then UNO can received data.
Why? WiFi shield and MP3 shield cannot be used together on UNO?
Please advise.