It's good to realise that INDILib improves more and more!
Two years ago i implemented the correct lx200 command strings inside the 3rdparty driver of Sykwalker. It's very pleasing to see their correct implementation in the lx200 core driver now.
By the way: I'm excited that meanwhile KStars 3.5.7 together with INDIlib 1.9.3 is working rock steady at our observatory.
For Meade at least, what is documented may not be what is fully supported, there may be other formats..
When made a few changes to the lx200 driver I also captured the communications
INDIlx200->TCP->Linux(SOCAT tcp to serial lx200)
For Autostar and lx200 classic with 3.34L roms
Unfortunately I could not find the pcap with the Sr/Sd to the lx200
Attached are snippets from Autostar and the lx200 in wireshark pcap.
Lovely, yes given that 'most' LX200 protocol based mounts just worked with this driver with its spaces and colons for many years that does not surprise me at all.