Any chance you can either create a plugin or a virtual device that can display the results from this API?
http://apidocs.tankutility.com/#introduction
The xml results look something like this:
{"device":{"name":"My DeviceName","address":"1234 Windy Road, Some Town, IN 46300, USA","fuelType":"propane","orientation":"horizontal","capacity":250,"status":"deployed","accountId":"","lastReading":{"tank":82.08488,"temperature":87.484,"time":1565293899732,"time_iso":"2019-08-08T19:51:39.732Z"}}}
Need to return the tank (level in percentage), temperature, and time_iso or converted time (of last read)