I am just building a new house. I have to talk with my RS485 Modbus devices like BMS, inverter, heat pumps and air exchanger with heat recovery. I received in Control.com forum a first working answer, how to talk with my air exchanger with heat recovery from a terminal window under Linux Ubuntu: 

dmesg | grep tty
modpoll -b 4800 -p none -a 1 -r 13 -c 1 /dev/ttyUSB0
modpoll -b 4800 -p none -a 1 -r 12 -c 1 /dev/ttyUSB0 10

[download]
After this worked, I installed Device::Modbus How to translate the above terminal commands into Perl using Device::Modbus?

In reply to How to talk with my RS485 Modbus devices by founder

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