M-Link protocol for Mitsubishi HVAC systems?

Dear OptoFans,
Have any of you connected to a Mitsubishi A/C system via a serial connection using a (proprietary) M-Link protocol? Either directly or via some kind of gateway?
Do share!

Hi Mary

I’ve connected several Mitsubishi systems through Opto via their bacnet/ip gateway. It’s called a HD-150. I’d like to connect directly but not sure about the protocol.

theres a bit of a gotcha with it that the instance has to contain the m-net ID of the unit and the property you wish to read I made a subroutine to read/write data. I’ll post it when I dig it up.

subroutines as promised. hopefully they are self explanatory

HD150Write.zip (21.6 KB)