I have a device I can communicate to via USB/RS232 port.
I know it receive the command I send because it react to them.
I have a command to retrieve its state that should respond but I'm not able to read any response ! What's wrong in my flow ?
I know that command works otherwise because I've tested it from a terminal.
here is the link to the protocol of the device :
https://www.dropbox.com/s/xbjc8xzbd25cm9d/Sumry6kW%20inverterRS232%20Protocol.pdf?dl=0
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