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PZEM-016 integration #974

Closed KameDomotics closed 2 years ago

KameDomotics commented 4 years ago

Describe the problem you have/What new integration you would like

Integration of PZEM-016 AC power meter

Please describe your use case for this integration and alternatives you've tried:

Would it be possible to integrate PZEM-016 into ESPHome?

I would like to use it to measure (and integrate in HomeAssistant) the electric current and parameters of an electricity meter

Additional context

randybb commented 4 years ago

Just curious. Is there any reason why you need Modbus power meter instead of PZEM-004T V3 that is newer, smaller, with better accuracy, with Modbus RTU over UART (you don't need RS485 transceiver, so it is easier to connect) and being supported?

KameDomotics commented 4 years ago

Just curious. Is there any reason why you need Modbus power meter instead of PZEM-004T V3 that is newer, smaller, with better accuracy, with Modbus RTU over UART (you don't need RS485 transceiver, so it is easier to connect) and being supported?

because I already own two PZEM-016.....

randybb commented 4 years ago

It is exactly as I thought - they still use the same protocol, so one option is to do a small modification to get rid of the RS-485 transceiver OR you can connect RS-485 transceiver with a driver (this is important!, because standard transceivers are half duplex, thus have a driver pin for switching direction) to ESP UART port. In both cases the standard pzemac platform should work.

For example here you can find some transceiver boards. 1, 2 and 4 are with integrated drivers - basically it does conversion from TTL UART to RS-485 - this is what you would need. 3 is just a bare transceiver - this is currently not supported.

KameDomotics commented 4 years ago

I have already made this change on PZEM (it was made for an esp32 with Tasmota)

image

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gio-dot commented 4 years ago

I have already made this change on PZEM (it was made for an esp32 with Tasmota)

Ok, now you can use it with esphome with this component https://esphome.io/components/sensor/pzemac.html There is an issue in that documentation but you can use this working setting https://github.com/Gio-dot/PZEM-016-OLED-2-OUT-ESPHome/blob/master/wemos_d1_pzem016_display.yaml There is already a pull request made by me for correct pzemac documentation https://github.com/esphome/esphome-docs/pull/636