Yes per the pics a 1.4 ospi “motherboard” and rpi1. I took the rpi off to take a pic and identify the version of motherboard and rpi.
I will try building it per that link.
BUT is it possible to cross compile (using platformio) or is there available a precompiled binary for <3 rpi versions? I imagine the build on a rpi1 is going to be painfully slow.