Sharing for others who might have similar problems. I am running mtools on a raspberry pi. When using the systemd templates in the repo, there were a few things that didn't work, so Im sharing my workarounds

1. When copying the "btmon.service" file from /usr/local/mtools/etc/systemd to /etc/systemd/system, it needs to be renamed to "[email protected]". Without this change you will get an error that the service file is missing when you try to enable the btmon instance using the "btmon@" command.
2. My version of raspian uses python3 as the default python interpreter. This wont work with mtools out of the box, and you'll get startup errors due to some syntax differences. Since I have other python scripts running, I didn't want to change the default python to python2 to support the provided systemd service script for btmon. Instead, I edited the [email protected] file and added the path to my python 2 install in the ExecStart command:

ExecStart=/usr/bin/python2.7 /usr/local/mtools/bin/btmon.py --quiet --config-file=/usr/local/mtools/etc/btmon-%I.cfg

Hopefully this will be helpful for others!