[WIP] master: small correction, usart irq preemptio st to 3
[BUGFIX] master: modified scheduler interrupt priority this should solve apparent freeze, added yellow led blink to show scheduler activity.
[ENHANCEMENT] master: increased Serial buffer to 512 bytes.
[WIP] master: slower yellow led blinking
[BUGFIX] master: corrected firmware name. This was preventing downloading logs from Mission Planner