Track microphone levels, short reads and PCM buffer drops. Report audio
queue admission separately from TLS writes, expose server replies and
ACKs before filtering, and capture per-round counters before timeouts.
Add diagnostic regression coverage and support POSIX hosts in WSS tests.
Preserve main GNSS and volume behavior while porting verified TLS, receive fixes and full-handshake optimizations. Add MQTT connection diagnostics and route MQTT through banban.api.talkingq.com:1883.
Include migration documentation and regression tools. Firmware builds and package checks passed; user confirmed new-board connectivity after switching the MQTT host to the domain.
chenjintao