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Add optional support for per meter byte order and some additional per register configs. #205

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  • Add optional 'byteorder' field to meters.
  • Add optional 'functioncodes' list, enables the config to specify function code used when reading individual registers.
  • Add optional 'datatypes' list, allows config to specify int or float type per register. Overrides meter's own 'datatype' when declared.
  • Provided example config of sontex EIA-485 modbus module.
  • Fix for meter parameter reading where only only one register is declared.

… register configs.

 - Add optional per meter 'byteorder' field.
 - Add optional 'functioncodes' list, enables the config to specify function code used when reading individual registers.
 - Add optional 'datatypes' list, allows config to specify int or float type per register. Overrides meter's own 'datatype' when declared.
 - Provided example config of sontex EIA-485 modbus module.
 - Fix for meter parameter reading where only only one register is declared.
@l0ne5tar
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Hi,
Sorry if this looks a bit rough, I've only been looking at this for a day or so, i thought i'd share in case its useful though.

Anyway, my setup (which was installed for some local electrification of heat gov study) is an SDM630 + sontex superstatic 449 + EIA485 modbus module.

https://sontex.ch/wp-content/uploads/2019/02/supercal531-modbus-ds-en.pdf

I was able to read from the SDM630 out of the box, but the heat meter requires a different byte order to properly read float data.
The functioncode and datatypes stuff was added because the device also has a mixture of int and float types, ive experimented with those locally but theyre not used in the example provided.

I wanted to do it this way because IMO the config should be able to configure the device without any hard coded device specific tests in the interfacer code..

@@ -223,6 +253,11 @@ def read(self):


def set(self, **kwargs):

def as_list(src):
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This is because a single value in the meter field appears to be read as individual chars, i.e.
registers = 724
comes out as if
registers = 7,2,4

@@ -66,6 +66,24 @@
names = V1,V2,V3,I1,I2,I3,P1,P2,P3,TotalPower,Import_kWh,Export_kWh
precision = 2,2,2,2,2,2,2,2,2,2,2,2

[[SONTEX_EIA485]]
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This is just my setup verbatim, it may not be suitable as a generic config example.

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