I’ve picked up one of these and intend to install it weekend after next:
https://www.luxproducts.com/geo/
It’s great form factor, is WiFi, can be app, web, and Alexa controlled, and best of all it can run on usb power. I’m wiring a usb power strip to my panel to power it and the Alexa, plus extra charging ports. $50 rebate from electric company means it cost is on par with other non-smart tstats I looked at. And I look forward to setting temp with my voice from the cab bunk.
I’ll report back how it goes.