Minimalmodbus add rid175 #179
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updated interface to add RI-D175M meter This meter codes results in BCD
fixed missing quotes around meter type check
Debugged version of code to read RI-D175 meter with bcd output
Updated to make meter_type consistent
Added additional meter_types for all supported meters. Fallback using datatype still available Using meter_type allows different meters to share same rs485 interface providing serial parameters match.
Updated config examples to show different meter types using same serial port
Updated from SDM120 readme to show additional meter types
showing examples of supported meters and mixed meters on single serial interface
| address = int(setting[meter]['address']) | ||
| self._log.info("Setting %s meters %s address %s", self.name, meter, address) | ||
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| if 'type' in setting[meter]: |
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Is this backward compatible?
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Hi Brian,
yes I think so, if no type is defined then it uses the previous method of working out which meter to use.
I have just tested on my install which uses the new version and put the following config in and it picks up the SDM120 and reads the values
[[SDM120]]
Type = EmonHubMinimalModbusInterfacer
[[[init_settings]]]
device = /dev/ttyUSB0
baud = 9600
[[[runtimesettings]]]
pubchannels = ToEmonCMS,
read_interval = 10
nodename = sdm120
# prefix = sdm_
[[[[meters]]]]
[[[[[sdm120]]]]]
address = 3
registers = 0,6,12,18,30,70,72,74,76
names = V,I,P,VA,PF,FR,EI,EE,RI
precision = 2,3,1,1,3,3,3,3,3
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heres the elif statements after the type lookups
'''
elif self.datatype == 'int':
value = self._rs485.read_register(int(self._settings['meters'][meter]['registers'][i]), functioncode=3)
elif self.datatype == 'float':
value = self._rs485.read_float(int(self._settings['meters'][meter]['registers'][i]), functioncode=4, number_of_registers=2)
'''
some of the scaling parameters needed adjustment to get the correct value.
some scaling factors needed adjusting to get correct readings
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I have updated some of the scaling factors to get the correct results from the RID175 meter |
Updated to latest EmonHub
Update branch to head
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Updated minimalmodbusinterfacer to add support for RI-D175 single phase modbus meter
This is a low cost 45A meter widely available from electrical wholesalers (i.e. CEF) mechanically it has some advantages over the widely used SDM120 as it allows up to 10mmsq cables and provides connections for 2 neutrals so does not require a separate 'T' connection in the neutral.
Data is returned from the meter as a long with bcd coded data.
Data Sheets attached below
RI_Data_Sheet_RI-D175_MID_01_12_20.pdf
RI-D175-C-COM-Modbus protocol-V02.pdf