Not all metrics are being picked up in grafana/prometheus

[nickdavies92]

I've got the TPLink Extension plug KP303 and not all the panels have data.
Total Power, Power, Current, Voltage, and Energy Usage don't have any data and I've gone to check the metrics in Prometheus and they don't exist.

It might be worth mentioning I manually downloaded the file and created a system file to get it running. I've installed it on a RPi which doesn't have docker installed.

It's picking up data for the other panels so I know the exporter is some-what working.

Has anyone else experienced this?

Also, great job on putting this repo together!