Hi @JPB,
If you are looking for a really simple and low-tech (and low cost) way to monitor your Gen7 compressor speed - and lots of other stuff - you could do worse than to buy an RS485-to-Ethernet adapter (under £50). Just connect this to the F1/F2 terminals on your MIM-E03*N PCB and (via an Ethernet cable) your broadband router. You can use a pair of PLAs in the latter if direct cabling is inconvenient.
Then download the adapter configuration software, a virtual COM port, and SNET-Pro2, onto your laptop/PC. These are all free, and easy to set up and use. I summarised the steps for this process in Monitoring Your Samsung ASHP Controller , but I’ve learned more since, so PM me if you’d like to go down this route and are unsure or would like more details (recommended supplier info etc.).