This wifi stack port has been going better than I expected. The ESP32 port and BL602 port are progressing. The existing source of each is helping the other.
I was worried about compliance and radio emissions from my ports but I've found that the radio hardware is quite similar fundamentally. The workload is getting heavier but it's getting closer to the end.
I will be sad when the BL602 is mostly finished. This was a long journey and I have learned a lot from getting bullied by a MCU for over a year.