Please add (unencrypted) TLM data.

Eddystone beacons are capable of Telemetry data.
I‘ve implemented the Eddystone feature to a Feather NRF52840 Express. To transmit temperature readings to my raspberry, I kinda hijacked the Eddystone URL to display temperature instead.

Later I found out, that Eddystone actually offers the Telemetry data to transmit Battery Voltage and device temperature but also a second temperature value:
https://github.com/google/eddystone/blob/master/eddystone-tlm/tlm-plain.md

May I kindly ask you to add this feature to the Eddystone CircuitPython repository?
This would be a great extension.

Thank you!

Start by reading the linked Eddystone TLM plain-data specification and inspect the repository's existing Eddystone implementation. Identify the entry point for constructing beacon payloads and any existing tests; done means the library can transmit unencrypted TLM data containing the specified battery voltage and temperature values.

Written by the indexing model from the issue text.