I recently added a new Genmon Add On for the CentriConnect Propane Tank Monitor: https://www.centriconnect.com/

I used to use the tankutility monitor (which was acquired by Generac), but it found it unreliable. To date I have had zero issues with the CentriConnect add on.

To enable this new add on, once you have purchased and setup the CentriConnect App with your monitor. Use the device ID that comes with the CentriConnect monitor as the device ID in the Add on Settings. Then contact support@centriconnect.com to get your User ID (a long alpha numeric string that you will need for the Add On setup).

The setting for "Check Sensor Battery" will send and email (if you have configured outbound email on the Settings page) if the CentriConnect sensor reports a critical battery level.

The setting for "Check for Missed Readings" will send an email if the CentriConnect monitor has not sent a reading in over 50 hours. Note: you can change the reading time out from 50 house to another whole number of hours by added the parameter "reading_timeout" to the file /etc/genmon/gencentriconnect.conf (this setting is not editable from the web UI since most people will likely be OK with the default of 50).

Once you enter your device ID and user ID, save the settings and gemon will restart. Then you should see a fuel gauge on the main web interface like this:

Here is the wiki entry for the add on:

https://github.com/jgyates/genmon/wiki/1----Software-Overview#gencentriconnectpy-optional

Relevant python code is here:
https://github.com/jgyates/genmon/blob/master/addon/gencentriconnect.py
https://github.com/jgyates/genmon/blob/master/genmonlib/mycentriconnect.py
https://github.com/jgyates/genmon/blob/master/conf/gencentriconnect.conf

Let me know if anyone has any questions.