Plus2PM Support

[markirb]

This creates a PR from timo's WIP for better overview and discussions

Current Issues

• Revert to stock FW is currently not possible
  This manifests itself that when stock fw is uploaded, the device boots into old firmware. most likely we override some factory default which is not there afterwards. this can be config0.json, as it is notably NOT shipped with stock fw update
  Fixed: this is because the i2c needs to be set in conf according to the model save in shelly partition, otherwise bootloop will occur or revert on OTA downgrade
• power measurement didn't work properly (prerequisite for Window covering)
• PM calibration values from nvs not yet read (are there any?)
• revision detection (there at least two hardware revision out there, with different pinouts), this one only works for latest HW REV
• PM Calibration value make no sense when writing to ADE registers so not used currently

[rrunner83]

will it be possible to use roller shutter mode as well on the Plus2PM?
somehow its not mentioned in the compatibility list. thanks for info!

[markirb]

Should be possible though I cannot test it myself. Waiting until confirmed

[rrunner83]

i have the hardware and could test it. but i can't find the firmware for the shelly.. could you send me the link pls?

[markirb]

https://github.com/mongoose-os-apps/shelly-homekit/releases/tag/2.12.0-beta3

[arnetm]

I just uploaded the Plus2PM zip, and confirmed working. Roller shutter mode + calibrate works perfectly. Kudos!

[hejsiri]

Shelly+ 2PM works like a garage door. Great news, @markirb good job :)