I took a look at the code. It appears that the meter-faces section is related to a serial device that can provide ADC input and output capability.
This is referred to internally as UCHAMELEON and the serial device responds, when initialized, with Chameleon.
You can see someone else’s response here - Telemetry support in app_rpt
This is a nice feature however I cannot find any reference to the hardware on the internet. We should find a new serial board that supports the input and output features and support that in the code base.
Danny/KB4MDD