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thomasw-1 asked

Eastron SDM630/SDM230 Modbus Energy Meter - community edition

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Important Note
Support of SDM630 is continued in thread "Power Meter lib for Modbus-RTU-based meters from ABB, Carlo Gavazzi (Victron) and Eastron", the support of SDM230 is deprecated.

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Update history

version 1.2

  • Support of legacy meter SDM630v1
    meter is only supported, if configured with baudrate >= 9600

version 1.1:

  • Support of SDM230
    (limited support - requires manual adaptation since device id is not supported on that device type - details see below)
    Thanks to Sergio for allowing access to his environment
  • Addition of supported product ID > shown properly in VRM

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Hi All,

I like to share an implementation for support of the Eastron SDM630-Modbus and SDM230-Modbus v2 energy meters.
For any usage a donation to seashepherd.org with an amount of 5 USD/EUR/GBP or equivalent is expected.

Installation

  • copy Eastron SDM meters v1.2.zip -file into directory /opt/victronenergy/dbus-modbus-client and unzip it.
  • Add following bold-marked line into file /opt/victronenergy/dbus-modbus-client/dbus-modbus-client.py
    import carlo_gavazzi
    import Eastron_SDM630v2 (in case you use another meter version apply alternatively expression "Eastron_SDM230" or "Eastron_SDM630v1" instead of "Eastron_SDM630v2 ")
    import ev_charger
    import smappee
  • rename file /opt/victronenergy/dbus-modbus-client/dbus-modbus-client.pyc into /opt/victronenergy/dbus-modbus-client/dbus-modbus-client.py.orig
  • Since that file is not automatically compiled by VenusOS execute following bold marked commands in directory /opt/victronenergy/dbus-modbus-client
    python
    Python 2.7.18 (default, Apr 15 2021, 10:46:30)
    [GCC 9.2.0] on linux2
    Type "help", "copyright", "credits" or "license" for more information.
    >>> import py_compile
    >>> py_compile.compile ('dbus-modbus-client.py')
    >>> exit()
  • reboot VenusOS

  • SDM230 specific:
    Since SDM230 does not support device id, the device must be identified by serial id.
    In order to do so:
    • Read serial ID with holding register FC00 (unsigned int32) from SDM device
      result e.g. 20084317 (using a tool like e.g. modbus poll, iobroker or node red)
    • convert id into hex: 20084317 >> 0132 765D
    • take first 2 hex-bytes (0132) and convert it back into int (here 306)
    • configure that number in file Eastron_SDM230.py
      1627119618938.png
    • in case you use more meters in parallel multiply setting like in this exampe ID "84".

  • Go to "Settings" > "Modbus TCP devices" and perform a "Scan for Devices" or directy add a device via "Devices" > "Add" using relevant IP and ModBus ID and port. Last option is much quicker and also supports non-default unit-IDs.
    A few seconds later the meter should appear in your main menu:
    1618745796225.png
  • Select in submenu "Setup" the usage as grid, pvinverter or generator meter
    1618745887195.png

Main page screenshot

1618745382616.png

Device screenshot1618745459392.png
Comments:

  • Firmware register is not filled by devices (so no modul issue).
  • In above screenshots don't be misled by empty phases 2 and 3. In test environment I had only phase 1 connected. Phase config is dependent of device configuration.
    As soon as meter is configured with 1 phase support only, driver detects circumstance and excludes remaining phases.
    1618748013891.png

Important: The installation is not resistent for VenusOS updates. After an update to another release installation has to be repeated.

Exclusion of liability: Although the module has been tested in depth, I don't take any liabilty for any potential damage on your installation

Thanks to Victron for their open platform and especially for the support of Matthijs Vader.

Energy MeterModbus TCP
1618745382616.png (164.9 KiB)
1618745459392.png (147.2 KiB)
1618745796225.png (12.8 KiB)
1618745887195.png (7.9 KiB)
1618748013891.png (12.8 KiB)
1627119618938.png (7.4 KiB)
eastron-sdm-meters-v12.zip (6.9 KiB)
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mark232 avatar image mark232 commented · Deleted

Hello. it is possible that if I added this data to the configuration, it would be able to send data via modbus to another device. I don't need venus to process it on the display.

class Eastron_Meter_3P(Eastron_Meter_1P):
def phase_regs(self, n):
s = 2 * (n - 1)
return [
Reg_f32b(0x0000 + s, '/Ac/L%d/Voltage' % n, 1, '%.1f V'),
Reg_f32b(0x0006 + s, '/Ac/L%d/Current' % n, 1, '%.1f A'),
Reg_f32b(0x000c + s, '/Ac/L%d/Power' % n, 1, '%.1f W'),

Reg_f32b(0x0012 + s, '/AC/L%d/PowerVAr' % n, 1, '%.1f VAr'),
Reg_f32b(0x015a + s, '/Ac/L%d/Energy/Forward' % n, 1, '%.1f kWh'),
Reg_f32b(0x0160 + s, '/Ac/L%d/Energy/Reverse' % n, 1, '%.1f kWh'),

Or any other data..

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