Connection refused after some time

[Roemke]

Hi I'm just finding this code, thank you very much.
I experimented a little with example_influxdb_v2.py and reduced the output by adding only the fields of my interest to the json_body. Running the script leads after a while to the following error:
Connection to (192.168.0.205, 1502) failed: [Errno 111] Connection refused
Traceback (most recent call last):
File "/home/pi/solaredge_modbus/./influx2WebServ.py", line 96, in
"c_model": meter_values["c_model"],
KeyError: 'c_model'
I tried a interval of 1 to 20 seconds and an Timeout of 1 and 5 seconds. The timeout leads to slower response (can see this looking at the timestamps). I print out the values by json.dump()
I don't poll the modbus interface with other clients, I don't know if Solaredge does something like this. Im using
pip3 show pymodbus
Name: pymodbus
Version: 3.7.4
I don't know where to look for an answer, sorry.
Karsten