Select Playlist via hardwired push button

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1

Hi,

I like to select a defined playlist via a pushbutton. Such that these push buttons act as a 1 button selection.

I am new to python and I struggle to find a good example that explains how to make the connection between Volumio SW stack and the GPIO pins.

I saw a lot of examples for the volume control via the GPIO, but for playlist selection I did not find until now.

Can you point in the good direction?

Many thanks,

Olaf

2

you can use parts of the code in the GPIO volume control topic, but you would need an to use an other command to select the playlist instead of increase / decrease volume. “mpc add” should do the trick

3

Thanks for the hint. In the end, understanding the “mpc”, all became clear. Here is the code, which works excellent. An Arduino sends via RX/TX the command. I used a straight forward 1 and 2 over the serial line to select the playlist.

regards,
Olaf

#!/usr/bin/env python

import subprocess
import time
import serial

ser = serial.Serial('/dev/ttyAMA0', 9600)

while True:
        select = ser.readline()
        print ("you selected playlist" + select)
        if select[0] == '1':
                subprocess.call(['mpc', 'clear'])
                subprocess.call(['mpc', 'load', 'PlayList_button_1'])
                subprocess.call(['mpc', 'play'])
                time.sleep(.2)
        elif select[0] == '2':
                subprocess.call(['mpc', 'clear'])
                subprocess.call(['mpc', 'load', 'PlayList_button_2'])
                subprocess.call(['mpc', 'play'])
                time.sleep(.2)