Hiraghm <[email protected]> wrote: > I came across this tiny little board on the Pine64 site, and I wonder...
I considered the same thing with an ESP-01 ( https://www.ebay.com.au/itm/195354250177 ). The idea was to find a couple of resistors on the M100 motherboard that could be lifted to isolate the actual modem from the uart in a non destructive way, and then use one of those tiny level shifters for the interface ( https://www.ebay.com.au/itm/174302572365 ). The default firmware of the ESP-01 recognizes AT commands so it should be easy to use it like a modem, and it is possible to set its baud rate so it should work at 300 Bauds which IIRC is the M100's speed when communicating with the modem. I had the parts around for a couple of years now (ESP-01 were very cheap back then) but before I attempt anything, I'd like to hear from you guys with way more experience than me if it has a tiny chance of working, or if I've totally overlooked something that would make this hack impossible. Cheers, Eric
