== Mycroft Mark II ==

=== body / case ===
The original mark2 body at [https://github.com/MycroftAI/hardware-mycroft-mark-II-rpi] was not printable on my FDM printer.
So I used this: [https://community.mycroft.ai/t/simplified-mark-ii-body-for-fdm-printing/8248/12] or [https://github.com/guhl/hardware-mycroft-mark-II-rpi]

=== Software basis ===
I used the picroft image Picroft_Buster-Keaton_2020-01-10.img as the software basis

=== Audio ===
I had two problems related to audio.

First the volume of the Adafruit MAX9744 Amplifier was very high and resulted in a general cracking and static noise when switched on.
=== Adafruit Volume control ===
I am controlling the volume of the MAX9744 using the CircuitPython Libraries (see [https://learn.adafruit.com/circuitpython-on-raspberrypi-linux/installing-circuitpython-on-raspberry-pi] ).
The things that I had to do: 
==== Install the library ====
while in (.venv)
* pip3 install RPI.GPIO
* pip3 install adafruit-blinka
==== Enable I2C ===
I2C is not enabled by default so run and enable I2C in the Interfacing Options
==== Python script ====
Use this script to set the initial volume to about the half (the range is 0 to 63). Create ~/bin/ada_volume.py with the following content
* nano ~/bin/ada_volume.py
{{{
import board
import busio
import adafruit_max9744
i2c = busio.I2C(board.SCL, board.SDA)
amp = adafruit_max9744.MAX9744(i2c)
amp.volume = 30
}}}
==== Start using systems ====
Place a service file in the user directory:
* nano ~/.config/systemd/user/myadavolume.service
with the content
{{{
[Unit]
Description=set adafruit volume
After=network.target

[Service]
Type=simple
ExecStart=/home/pi/mycroft-core/.venv/bin/python /home/pi/bin/ada_volume.py

[Install]
WantedBy=default.target
}}}
Enable and start it:
* systemctl --user daemon-reload
* systemctl --user enable myadavolume
* systemctl --user start myadavolume