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fsantini / python-e3dc

Python API for querying E3/DC systems through the manufacturer's portal
MIT License
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python-e3dc

PyPI version GitHub license Codestyle Documentation Status

NOTE: With Release 0.8.0 at least Python 3.8 is required

Python API for querying an E3/DC systems

This is supported either directly via RSCP connection or through the manufacturer's portal. The RSCP implementation has currently the most capabilities.

In order to use it you need:

Alternatively, for a web connection, you need:

Installation

This package can be installed from pip:

pip install pye3dc

Configuration

There is a great variety of E3/DC implementation configurations, that can't automatically be detected. For example the index of the root power meter can be either 0 or 6, depending how the system was installed. Additional power meter can have an ID of 1-4 and there might be also multiple inverter. This library assumes, that there is one inverter installed and the root power meter has an index of 6 for S10 mini and 0 for other systems.

For any other configurations, there is an optional configuration object that can be used to alter the defaults:

{
  "pvis": [
    {
      "index": 0,
      "strings": 2,
      "phases": 3
    }
  ],
  "powermeters": [
    {
      "index": 6
    }
  ],
  "batteries": [
    {
      "index": 0,
      "dcbs": 2
    }
  ]
}

Note: Not all options need to be configured.

Usage

Local Connection

An example script using the library is the following:

from e3dc import E3DC

TCP_IP = '192.168.1.57'
USERNAME = 'test@test.com'
PASS = 'MySecurePassword'
KEY = 'abc123'
CONFIG = {}
# CONFIG = {"powermeters": [{"index": 6}]}

print("local connection")
e3dc_obj = E3DC(E3DC.CONNECT_LOCAL, username=USERNAME, password=PASS, ipAddress = TCP_IP, key = KEY, configuration = CONFIG)
# The following connections are performed through the RSCP interface
print(e3dc_obj.poll(keepAlive=True))
print(e3dc_obj.get_pvi_data(keepAlive=True))
e3dc_obj.disconnect()

Web Connection

An example script using the library is the following:

from e3dc import E3DC

USERNAME = 'test@test.com'
PASS = 'MySecurePassword'
SERIALNUMBER = 'S10-012345678910'
CONFIG = {}

print("web connection")
e3dc_obj = E3DC(E3DC.CONNECT_WEB, username=USERNAME, password=PASS, serialNumber = SERIALNUMBER, isPasswordMd5=False, configuration = CONFIG)
# connect to the portal and poll the status. This might raise an exception in case of failed login. This operation is performed with Ajax
print(e3dc_obj.poll(keepAlive=True))
print(e3dc_obj.get_pvi_data(keepAlive=True))
e3dc_obj.disconnect()

Example: poll() return values

Poll returns a dictionary like the following:

{
    'autarky': 100,
    'consumption': {
        'battery': 470,
        'house': 477,
        'wallbox': 0
    },
    'production': {
        'solar' : 951,
        'add' : 0,
        'grid' : -4
    },
    'stateOfCharge': 77,
    'selfConsumption': 100,
    'time': datetime.datetime(2021, 8, 14, 7, 6, 13)
}

Available methods

See the full documentation on ReadTheDocs

Note: The RSCP interface

The communication to an E3/DC system has to be implemented via a rather complicated protocol, called by E3/DC RSCP. This protocol is binary and based on websockets. The documentation provided by E3/DC is limited and outdated. It can be found in the E3/DC download portal.

If keepAlive is false, the websocket connection is closed after the command. This makes sense because these requests are not meant to be made as often as the status requests, however, if keepAlive is True, the connection is left open and kept alive in the background in a separate thread.

Known limitations

One limitation of the package concerns the implemented RSCP methods. This project also lacks the hardware to test different configurations. However, the RSCP protocol is fully implemented and it should be easy to extend the requests to other use cases.

Projects using this library

Contribution