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Fast and easy to understand Arduino library to use the DFPlayer Mini MP3 module from DFRobot.com. This is a huge improvement (both in terms of execution speed and simplicity) to the standard library provided by DFRobot.com.
This project use a Dfplayer mini with a raspberry pi pico and a mq135 sensor when smoke detected the Alert mp3 stored in the dfplayer mini will activate..
System that provides an RFID card reader in order to select an album or track in an SD card, avoiding use of buttons or hard to use interfaces for elder people.