Setup

aplay -l
sudo nano /etc/asound.conf

defaults.pcm.card 2
defaults.ctl.card 2

# Start GUI
alsamixer
# CLI
amixer sset Master 50%
amixer sset Master 10%+
amixer sset Master 10%-

apt install -y libpaho-mqttpp-dev

Reboot

sudo crontab -e

0 3 * * * /sbin/reboot