New device: PZEM004

[enesbcs]

PZEM-004T-10A ordered from Ali.

[enesbcs]

Caching method added for PZEM004 type to P206 at commit https://github.com/enesbcs/rpieasy/commit/9d1aaddacc090eb79671bb60428a760cb7e685b7

[Epik77]

Hi Alexander,

I confirm the correct functioning of the pzem-004 I wanted to reset the counter but the pzemreset command doesn't work 08:01:07: Unknown command: pzemreset, 1 am I wrong? thank you very much for the support

[enesbcs]

Thank you for your feedback, i will check pzemreset function.

[enesbcs]

Interesting, it looks like the serial port needs to be closed after every transaction to work stable. The _performCommand(66,'') alias "resetenergy" function fails to run otherwise. / I feel some Star Wars hint here :) / Fixed in commit https://github.com/enesbcs/rpieasy/commit/0335dbca4773ef83311c74f64ca51a1f9811adeb

[TD-er]

Maybe you can also force to flush the buffers of the serial port? Or does it need some specific logic pin state which you also set by closing the port?

[enesbcs]

Honestly it is the minimalmodbus library which handles the serial at all, like that:

minimalmodbus.Instrument(self.port,self.address,close_port_after_each_call=True)

In theory there are a "clear_buffers_before_each_transaction" attribute which may be used alternately but "close_port_after_each_call" works fine when i had tested it.

If i set "close_port_after_each_call=False" then IO error 25 pops up when sending commands through minimalmodbus.

[enesbcs]

Closed as fixed

[Epik77]

Hello I re-open this issue after one year because after the python modbus upgrade the device does not work correctly. The pzemreset command no longer works: Unknown command: pzemreset, 1 The serial is not read correctly rpieasy reports the last value read "correctly" on the display and on the controller.

thanks for the support.