I followed these instructions but it still doesn’t work. Is dietpi a different process?
Open another SSH session (Putty or SSH client) and login to the PI.
All following actions must be done on this second SSH login instance!
Setting YAP to run automatically as a service
sudo nano /etc/systemd/system/yap.service
Copy and paste the following on the opened window:
Description=A simple proxy for SSTV and Plex DVR
ExecStart=/usr/bin/python3 sstvProxy.py -hl
Press Ctrl and x together
Press Y to save, and press the enter key again to save the file
Now enable the service so it starts every time you reboot:
sudo systemctl enable yap.service