Nibe / HMA100-S FDCW100VNX-A heatpump Modbus problem

Hi all,

I’m trying to hookup the heatpump but I can’t get any connection over tcp and the only port that is “open” is port 23 (telnet?):person_shrugging:.

Does someone know how to update the firmware of this thing?

:folded_hands:t2: