Firmware was already half-wired: the bridge read
BaseProduct.getFirmwarePackageVersion() once, at connect. The SDK
returns null there until it has finished handshaking with the
aircraft, so the About panel almost always showed "-" instead. The
serial was never fetched at all.
Resolve both asynchronously after connect. fetchIdentity() reads the
serial from FlightController.getSerialNumber() and the firmware from
the product package version, falling back to the component-level
getFirmwareVersion() for aircraft that only report the latter. It
re-checks every 2s (max 6 attempts) and emits each value on a new
`identity` event as it lands, so the serial still appears when
firmware never resolves. Values are cached to answer getProductInfo
without re-fetching, and cleared on disconnect.
The SDK delivers lifecycle callbacks on arbitrary threads, so all
identity mutation hops onto the main thread, guarded by a generation
counter that strands retries queued for a product that has since
changed or dropped - otherwise a reconnect could race a stale chain
and report the previous aircraft.
Verified via flutter analyze and an APK build (which type-checks the
new MSDK calls). Runtime timing and the reported values still need a
physical aircraft.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
