er9x is the best known firmware. It has a superb range of features and is well supported by the community. Well worth trying out.
This is another idea, but you need to know PXX2 thoroughly. I have not checked if the pins match and are the same as with Atmega128.bob195558 wrote: ↑Fri Aug 21, 2020 1:36 pmMaybe upgrading to the ATMEGA2561-16AU CPU Chip ?: https://openrcforums.com/forum/viewtopi ... 120#p74105
Has anyone ever done this to good effect?
Another question, what will people say, how will they change the cpu instead of changing a few wires and adding a small 2x2cm pcb?
Besides, it is an 8 bit processor with 8K ram, and the simplest STM or Silicon Labs has 20k frames and 32 bits STM. I don't know what will be better and will be happy to discuss the topic. The first point is PXX2 because I don't know it.
The pinout is correct, but if you can achieve 420k bitrate with it. It costs a few dollars on ali, so you could buy an evaluation board and check it out, but I know PXX2 like nothing. The issue remains 16MHz and the 8 bit core. Therefore, it is crucial to find out what exactly this PXX2 in the R9M does.