Version 0.9 adds a few new firmware features and accompanying
AltosUI changes, along with new hardware support.
Support for TeleMetrum v1.1 hardware. Sources for the flash
memory part used in v1.0 dried up, so v1.1 uses a different part
which required a new driver and support for explicit flight log
erasing.
Multiple flight log support. This stores more than one flight
log in the on-board flash memory. It also requires the user to
explicitly erase flights so that you won't lose flight logs just
because you fly the same board twice in one day.
Telemetry support for devices with serial number >=
256. Previous versions used a telemetry packet format that
provided only 8 bits for the device serial number. This change
requires that both ends of the telemetry link be running the 0.9
firmware or they will not communicate.