I think I'll setup my own Stratum server (more abilities to monitor what's arriving, log stuff etc.) and do these 2 soon-ish.
It will be C or C++ through ESP-IDF, though. I'm quite comfortable with that.
Do you have a solid solution for running your own Stratum proxy? The only way I have been able to do it with my node is to run ckpool (modified for recent bitcoin core versions here;
https://github.com/skot/ckpool)