python-dds238

This library is very useful when reading the chinese DDS238 (and its variants: DDS238-2, ...) power meter.

This library supposes that you're using an USB-to-RS485 dongle. It doesn't work yet for modbus-over-TCP (though if you want to propose an MR, i'd accept it gladly !).

Installation

To install the library, simply type:

$ pip3 install python-dds238

Usage

I'ts very simple:

>>> from dds238 import DDS238
>>> meter = DDS238(modbus_device='/dev/ttyUSB0', meter_id=20)
>>> meter.voltage
215.4
>>> meter.power
1632
>>> meter.export_energy
1288.2

DOC

 |  current
 |      Returns the current in Amperes
 |
 |  export_energy
 |      Returns the exported energy, in kWh
 |
 |  frequency
 |      Returns the frequency in Herz
 |
 |  import_energy
 |      Returns the imported energy, in kWh
 |
 |  power
 |      Returns the power in Watts. Positive is import. Negative power is exported
 |
 |  power_factor
 |      Returns the power factor (0-1 scalar)
 |
 |  reactive_power
 |      Return the reactive power in VAr
 |
 |  voltage
 |      Returns the voltage in Volts
 |
 |  ----------------------------------------------------------------------
 |
 |  change_address(self, address: int, baudrate=9600)
 |      Change the modbus address and the baudrate of the current device. USE AT YOUR OWN RISK !