question

Maybe related to this:

https://github.com/victronenergy/venus/issues/1098

3.20 was in beta for over 4 months.

I am currently reading a ton of data via this method, just a snip of the code. Any idea if the changes associated with MQTT and/or 3.20 might break this functionality?

import mysql.connector
import time
from pymodbus.constants import Defaults
from pymodbus.constants import Endian
from pymodbus.client.sync import ModbusTcpClient as ModbusClient
from pymodbus.payload import BinaryPayloadDecoder
 
Defaults.Timeout = 25
Defaults.Retries = 5
client = ModbusClient('192.168.2.23', port='50

result = client.read_input_registers(840, 1)
decoder = BinaryPayloadDecoder.fromRegisters(result.registers, byteorder=Endian.Big)
batteryvoltage=decoder.decode_16bit_uint()
print("Battery voltage: {0:.2f}V".format(batteryvoltage/10.0))

Hey all,

This must be something specific:

- html5 app uses MQTT and works fine in v3.20

- gui-v2 uses MQTT and works fine in v3.20

- VRM real time info uses MQTT and works fine in v3.20

- the MQTT related changes have been in beta for months and I know many beta users that use it for various things; and it works for them.

But for in your case its clear that something broke or something changed, so now we need to find out what.

How are you sending your keep alives?

Ess is on external Controll

Hi All,

I had a similar issue https://community.victronenergy.com/questions/262793/mqtt-fail-to-connect-320.html

But that post has now been locked. I've since installed 3v30~6 and the issue still persists, so it looks like my issue is a similar bug, but not the same one.

Roll back to v3.14 and all works again, with no other changes

Thanks

I also have issues with the newest version, so rolled back for now. When using the newest version with my simple node.js script it works sometimes, for a while. Then I need to reboot the ccgx, and it might start working again, or I have to reboot once more. If Victron want the script, or access to the rpi that is running it, so they can test, let me know how to share.

@mvader (Victron Energy)

i tried to use the gui-beta, so enabled the MQTT. Doenst work. Might be due to the same issue. Nothing else specific for MQTT is currently in place.

I just wanted to provide you a 3p env with latest cerbo version if this might help to investigate.

Hi all,

thanks for being in touch for fixing MY problem.

I´ve a three phase system here and i use the mqtt data in my smarthome system (knx with edomi).

We have many internet outages here and in this moment mqtt sends no data via mqtt to edomi. Since i´ve figured it out, i´ve fixed it with edomi by triggering it with a keepalive to the cerbo gx every 60 seconds.

I will clearly say i dont use username and password between edomi and cerbo gx! In Edomi its possible to set username and password. But where in the cerbo gx device could i set this? I can imagin with ssh and putty... addon comment: Better to know where to set in Venus OS 3.22 to use it with flashMQ!

Whats not clear to me is flashMQ active parallel to mosquitto on the cerbo gx device in Venus OS >3.14? Are there two MQTT systems on it? One for VRM and one for personal use?

I am not afraid to test it here at my site. I will update 2 of my 8 victron customersites in the next two weeks because of "normal" installation without smarthome or other implementations. In June i have to build a "outback" site here in Germany and there i must use mqtt data for an intelligent loadmanagement.

regards

Daniel