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Initial support for ABB EV3 #1

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Initial support for ABB EV3 #1

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11 changes: 10 additions & 1 deletion README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -4,7 +4,7 @@ This is a Python module that implements the communication to several electricity

At the moment, the following meters are supported:

* ABB B21, B23, A43 and similar ABB meters (Modbus Serial)
* ABB B21, B23, A43, EV3 and similar ABB meters (Modbus Serial)
* SMA SunnyBoy (Modbus TCP)
* MultiCube meters

Expand All @@ -31,6 +31,15 @@ data = meter.read()

This returns a dictionary with all key-value pairs of data.

To read all resgisters from ABB EV3 (using default serial values 9600, 8E1):
```
from energymeter import ABBMeter
import serial

meter = ABBMeter(port="/dev/ttyUSB0", baudrate=9600, parity=serial.PARITY_EVEN, slaveaddress=1, model="EV3")
data = meter.read()
```

To read a single register:

```
Expand Down
26 changes: 21 additions & 5 deletions energymeter.py
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Expand Up @@ -4,6 +4,7 @@
import struct
import asyncio
import time
import serial

import minimalmodbus
import tinysbus
Expand All @@ -13,22 +14,25 @@

class ModbusRTUMeter:
"""Meter class that uses a minimalmodbus Instrument to query an ABB meter."""
def __init__(self, port, baudrate=38400, slaveaddress=1, timeout=0.5):
def __init__(self, port, baudrate=38400, parity=serial.PARITY_NONE, slaveaddress=1, timeout=0.5, debug=False):
""" Initialize the ModbusRTUmeter object.

Arguments:
* port: a serial port (string)
* baudrate: the baudrate to use (integer)
* parity: the serial parity to use
* slaveaddress: the address of the modbus device (integer)
* Specification of the type. Used to limit the registers to a specific set.
* debug: toggle debug output

Returns:
* An ABBMeter object

"""
self.instrument = minimalmodbus.Instrument(port, slaveaddress)
self.instrument = minimalmodbus.Instrument(port, slaveaddress, debug=debug)
self.instrument.serial.baudrate = baudrate
self.instrument.serial.timeout = timeout
self.instrument.serial.parity = parity

def read(self, regnames=None):
""" Read one, many or all registers from the device
Expand Down Expand Up @@ -224,8 +228,8 @@ def _convert_value(self, values, signed=False, number_of_decimals=0, is_float=Fa


class ABBMeter(ModbusRTUMeter):
def __init__(self, port, baudrate=38400, slaveaddress=1, timeout=0.5, model=None):
super().__init__(port, baudrate, slaveaddress, timeout)
def __init__(self, port, baudrate=38400, parity=serial.PARITY_NONE, slaveaddress=1, timeout=0.5, model=None, debug=False):
super().__init__(port, baudrate, parity, slaveaddress, timeout, debug)
if model in ABBMeter.REGSETS:
self.REGS = [register for register in ABBMeter._REGS if register['name'] in ABBMeter.REGSETS[model]]
else:
Expand Down Expand Up @@ -555,7 +559,19 @@ def __init__(self, port, baudrate=38400, slaveaddress=1, timeout=0.5, model=None
"voltage_l1_n", "current_l1", "active_power_total",
"reactive_power_total", "apparent_power_total", "frequency",
"phase_angle_power_total", "power_factor_total",
"current_quadrant_total"]
"current_quadrant_total"],
"EV3": ["active_import", "active_export", "active_net",
"active_import_l1", "active_import_l2", "active_import_l3",
"active_export_l1", "active_export_l2", "active_export_l3",
"active_net_l1", "active_net_l2", "active_net_l3",
"voltage_l1_n", "voltage_l2_n", "voltage_l3_n",
"voltage_l1_l2", "voltage_l3_l2", "voltage_l1_l3",
"current_l1", "current_l2", "current_l3",
"active_power_total", "active_power_l1", "active_power_l2",
"active_power_l3", "reactive_power_total",
"frequency", "phase_angle_power_total",
"power_factor_total", "power_factor_l1", "power_factor_l2",
"power_factor_l3", "ev3_serial_number"]
}
NULLS = [pow(2, n) - 1 for n in (64, 63, 32, 31, 16, 15)]

Expand Down