Audio section
The CM3-Home uses an audio section electrically similar to the Raspberry Pi 3 but using
different GPIO lines. This article explains how to configure your Raspbian distribution to
be compatible with this hardware. Making a little change on the config.txt file all the other
behaviour is the same as with Raspberry Pi 3.
config.txt configuration
Add this two lines on config.txt file the reboot:
# Set the CM3-Home audio lines
dtoverlay=pwm-2chan,pin=40,func=4,pin2=41,func2=4
How to try the audio out
Install omxpayer by typing:
sudo apt-get update
sudo apt-get install omxplayer
Download this two audio files:
wget https://www.acmesystems.it/cm3home/CM3-HOME_audio/speaker_test.m4a
Launch it:
omxplayer -o local speaker_test.m4a
eShop
 EUR 140.00 | CM3-HOME-B - Home automation carrier board for Raspberry CM3L module Motherboard designed to provide a reliable Home Automation solution based on Raspberry Pi CM3L industrial module Please note: This code is related just to the carrier board. The Raspberry CM3L module is not included Otional parts:
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Sergio Tanzilli
System designer and Acme co-founder
Personal email: tanzilli@acmesystems.it
Webpages: https://www.acmesystems.it - https://www.tanzolab.it - http://www.tanzilli.com
Github repositories: https://github.com/tanzilli and https://github.com/acmesystems
System designer and Acme co-founder
Personal email: tanzilli@acmesystems.it
Webpages: https://www.acmesystems.it - https://www.tanzolab.it - http://www.tanzilli.com
Github repositories: https://github.com/tanzilli and https://github.com/acmesystems
