Connect ultrasonic and relay according to the pin defined in source code. Created DFPlayer as library and can be used in any project.

DFPlayers are inexpensive and they have a serial interface. This makes them a useful resource for IOT projects. While it is true that the DFPlayer can be used without a library, it is also true that a ...

When [Neutrino-1] saw DFRobot’s DFPlayer module, he decided he wanted to make his own retro MP3 player. This tiny module comes packed with a ton of interesting capabilities such as EQ adjustment, ...