Mark, great job, I use the OVMS daily. Somewhere in this thread you wrote this:
"The Tesla Roadster does not support remote control of cabin heater, so we can't pre-heat that remotely."
An alternative for pre-heating the cabin is to connect a low-power heater to the 12 volts system. Is there any way to wake up the 12 volts system and keep it on for 20 minutes or more? I tried "Wake Up Car" but the result is "Server Acknowledged Null".
The 12 volts heater is not effective but if it could pre-heat the front window it would be better than no pre-heating.