Hi Joe,
do you have any news or solutions to this topic ???
I get following Error
OMD[ensag]:/opt/omd/sites/ensag/local/share/check_mk/agents/special$ ./agent_modbus 10.124.176.xx 502 856:2:counter:active_energy 790:2:gauge:active_power\n
error: Bad file descriptor
Greets Bernd