Making our program start automatically

As with our previous projects, we now need to make our program start as soon as we switch our Pi Zero on:

Now, we will create our service definition file; type this:

sudo nano /lib/systemd/system/twitterTshirt.service

Now, type the definition into it:

[Unit]
Description=Twitter TShirt Service
After=multi-user.target

[Service]
Type=idle
ExecStart=/home/pi/WearableTech/Chapter5/ledTshirt.py

[Install]
WantedBy=multi-user.target

Save and exit Nano by typing Ctrl + O, followed by Enter, and then Ctrl + X. Now, change the file permissions, reload the systemd daemon, and activate our service by typing this:

sudo chmod 644 /lib/systemd/system/twitterTshirt.service 
sudo systemctl daemon-reload
sudo systemctl enable twitterTshirt.service 

Now, we need to test if this is working, so reboot your Pi by typing sudo reboot, and then when your Pi Zero restarts...