That is the same software version as my Synology. Maybe @rklomp is right and it is caused by the openssl libraries. If I do a Google search on openssl tls synology I only find information about the ssl certificate on the Synology itself, nothing about SSL connection to another device. Is there any ...

artstam wrote: ↑Wednesday 02 December 2020 14:30 I switched from synology (did not work) to raspberry pi. I installed python, git and pip and i can add the hardware. I see 2 devices but no data.

What Synology and what DSM version did you used?

I let it run longer and did a update on the hardware in Domotics while running.
New log attached, it looks the same for me

rklomp wrote: ↑Tuesday 01 December 2020 15:15 In the log I do not see a SSL handshake, but I see it tries to setup the connection via HTTP port 80. What is you current configuration? Have configured it to use HTTPS? Can you share a screenshot?

New log and printscreen of settings attached.

Zipped the pcap file.

I can't get tcpdump to do anything (i'm trying with windump).

What do you expect to see?
Is is something that I can get with Wireshark?

192.168.0.4 redirects to https://192.168.0.4 if I open the webpage in a browser.
I searched within the settings of the SMA but can't find any settings, not for security, SSL, TLS, 443, ...

I I can only reach my SMA via https, I can't find a setting to disable https. (Tripower 4.0 with firmware 3.10.10.R).
My Synology is a RS812+ with DSM 6.2.3-25426 Update 2

I managed to install this plugin thanks to the previous posts in this topic. It took some searching to get pip3 installed and I think it worked out correctly in the end. I was able to add the hardware and 2 devices but I get errors in the log. Below you see the log (with debugging on). I suspect ...

Ik did not notice any errors after installing.

Is there a way to check if the installation was succesfull?

The dependancies (pymodbus & pymodbusTCP) are installed. The error in my logs: 2020-08-29 15:06:07.528 Error: (ModbusREAD) failed to load 'plugin.py', Python Path used was '/usr/local/domoticz/var/plugins/modbus-read/:/volume1/@appstore/py3k/usr/local/lib/python35.zip:/volume1/@appstore/py3k/usr ...

2018-08-21 23:33:38.790 Status: (Modbus-1) Started. 2018-08-21 23:33:38.884 Error: (Modbus) failed to load 'plugin.py', Python Path used was '/usr/local/domoticz/var/plugins/modbus-read/:/volume1/@appstore/py3k/usr/local/lib/python35.zip:/volume1/@appstore/py3k/usr/local/lib/python3.5/:/volume1 ...