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Electronics Projects with the ESP8266 and ESP32: Building Web Pages, Applications, and WiFi Enabled Devices
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Electronics Projects with the ESP8266 and ESP32: Building Web Pages, Applications, and WiFi Enabled Devices

by Neil Cameron
December 2020
Intermediate to advanced
703 pages
12h 21m
English
Apress
Content preview from Electronics Projects with the ESP8266 and ESP32: Building Web Pages, Applications, and WiFi Enabled Devices
© Neil Cameron 2021
N. CameronElectronics Projects with the ESP8266 and ESP32https://doi.org/10.1007/978-1-4842-6336-5_5

5. MP3 player

Neil Cameron1  
(1)
Edinburgh, UK
 
The DFPlayer Mini MP3 player with built-in micro-SD card module is either used as a battery-powered stand-alone module with push-button controls or connected to a microcontroller for more comprehensive control features. The MP3 player has audio output channels for earphone or amplifier input (DAC R and DAC L) and for loudspeaker input (SPK1 and SPK2), UART Serial communication (RX and TX), and four control pins (IO1, IO2, ADKEY1, and ADKEY2) that are active LOW (see Figure 5-1) . The BUSY pin is LOW when an audio file is playing, but otherwise HIGH. The MP3 has a music equalizer with ...
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ISBN: 9781484263365Purchase LinkPublisher Website