I use Modbus RTU with a USB converter.
I understood the code so no I could make it work as I wanted (Modbus write).
I also wrote a code as python plugin to make an Event-Logger (check all 10 secs for new values and save to a daily log file).
perhaps somebody is interested in.

Hi all, I have now running since 3 days 3 different Modbus equipments in my house for thermal and energy metering as well as for my heating system. In general it works quite well (reading). However, sometimes domoticz, even if it is displaying OK when I check the status, the web interface is blocked ...

Hi, I found the problem: at the end of heartbeat in the try of updating the value in Domoticz I changed: Devices[1].Update(0,value) to Devices[1].Update(nValue=Devices[1].nValue, sValue=value, TimedOut=1) now it works perfectly, so again: Great work. I am not sure if the indentations were really the ...

I had the same message mith module pymodbus, but this was due to the double import of python3.4 and 3.5 (it stoped there ...)

concerning my problem:
if I put "pass" instead of Devices[1].Update(0, value) everything works now.
so the error MUST be in this line.
domoticz is v3.8849

I started debugging using the log ... the error (in my case) is: - the indentation was false in many tries and excepts - in the last "try" of "heartbeat" I still did not get it work: Devices[1].Update(0, value) Is the value to be sent really a string? or the argument 0 in update? Peter

I was not clear in what I wrote ...
I installed it in Python 2. with pip
and I also copied the six.py in the folder you told me ...
and everythings blocks in the Domoticz log after "onStart" (until there I get the log messages)

@McMello:
I had this message too, I think you have one line 98 in plugin.py a sys.path.append of a python version that you do not have on your system (in my case it was python 3.4)

Hi, I tried exactly as you described except that was too fast and did : sudo pip3 install six I think I should probably not have done that. so I uninstalled it and copied the six.py at the place you mentioned. the result is that the Domoticz webinterface does not load anymore at all. I commented ...

Great. I will try tomorrow morning. Thank you !!!

Hello, first of all, great !!! it looks really nice ... in theory. in practice, I did not get it working ... I think I installed all as described (plugin folders, I installed pymodbus in python 3, but I get this in the log: 2018-01-25 15:38:55.416 Domoticz V3.8153 (c)2012-2017 GizMoCuz 2018-01-25 15 ...