Datasheet

GPIO Pins

The VS1053 has 7 GPIO pins that can be read and written via the library. The player_gpiotest

sketch demonstrates how to do this. Be careful about pulling up GPIO1 - if the shield restarts when

GPIO1 is connected to 3V logic, it will boot into 'MIDI' mode

We can quickly demo the shield by slipping 3mm LEDs into alternating slots. Connect the positive

(anode) to the 3V side of the dual strip

What? No current limiting resistors?

Strictly speaking, best practice is to use a current limiting resistor when driving an LED from a GPIO

pin. In this case, the example sketch pulses each led only briefly, so there is no danger of damage.

For more general use, you should select a resistor appropriate for the led you are using. See All

About LEDs (http://adafru.it/clH) for more detail.

The 7 GPIOs are by default pulled low with 100K resistors, and can only take up to 3V logic!



https://learn.adafruit.com/adafruit-music-maker-shield-vs1053-mp3-

wav-wave-ogg-vorbis-player

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