PowerMeter Class + SDM PowerMeter support

[Adminius]

New PowerMeter Class

• Supports MQTT
• SDM72/630 and similar Power Meters via RS485 adaptor

[helgeerbe]

Had to add 41da6d4 to get it working. Wondering why this was not in the PR.

[Adminius]

sorry, that's because I've manuely merged my brunch to dev branch

[helgeerbe]

I found some additional issues. Hopefully I fixed it so far. My shelly power meter is now working. Can you test, the development branch for your power meter?

[Adminius]

my biggest problem sofar: I can't switch between MQTT and SDM, ESP reboots, I think because of MQTT reinitialisation.
MQTT unsubscribe won't work. That causes that settings will not be saved

[Adminius]

MQTT is working
SDM Power Meter is working
Settings saving is working

[helgeerbe]

Perfect. I will follow the KISS principle (Keep it simple and stupid), and implement a reboot after config changes. So you don't have to deal with unsubscribe from old MQTT topics, or changing communication speed on the serial interface.
Just store the new settings->reboot->make a clean init.

[Adminius]

that would be the easiest and safest solution.
somewhere was the hint: change and save settings without reboot, thats why I didn't made it...

Ok, some topics are still open: pin setting (and switch to softserial to free up a HW UART for BMS), baudrate from settings, address from settings.. I see this tasks by myself

.. and completly new option: HTTP with JSON parser to support Tasmota/Hinchi IR without MQTT

[berni2288]

.. and completly new option: HTTP with JSON parser to support Tasmota/Hinchi IR without MQTT

#141

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