Presses the restart button while the module is mid transmission: the
in-flight frame tail bytes arriving right after the restart command
must not count as proof the module is up, and the setup handshake must
only run again after the module's first post-boot frame.
Ignore reception during a settle window at the start of each listen
phase so in-flight bytes from a restarting module cannot count as
proof it is up, drain stale replies before each startup send so acks
cannot be matched to the wrong command, always send the blind config
mode exit when abandoning a sequence, log module error replies and an
unknown firmware version on the give-up path, skip transmitting for
states with no command frame, and clear the warning status when a
later apply or factory reset succeeds. Fixture timings adjusted for
the settle window.
Clear cmd_active_ when the blocking engine exhausts retries so loop()
does not stay skipped forever, send config mode exit blind before
abandoning a startup sequence so the module resumes streaming, and
repeat the first frame in the delayed boot fixture so the initial
state swallow cannot make the test flaky.
Rebuild startup frames on demand instead of keeping a frame member,
share the ack timeout and retry constants with the blocking engine,
guard the restart button during startup, drop dead code, and factor
the duplicated integration test bodies into a shared helper.
The LD2420 locks up until power cycled if it receives any data before
it has sent its first frame after powering on. Setup previously
transmitted immediately, blocking for up to 3 seconds and marking the
component failed on the first timeout. Setup is now a non blocking
state machine that listens for the module before transmitting, retries
the handshake, and degrades to a warning instead of failing.
Behavior free refactor: split the frame serialization out of
send_cmd_from_array, split the frame construction out of the blocking
command functions into build helpers, name the ack timeout and retry
constants, remove the unused CmdFrameT length field and the unused
get_reg_value_ method. No functional change.
The component declared setup_priority::BUS, the same tier as the UART
bus itself. At a tie the setup order falls back to registration order,
so on ESP-IDF the component could run setup before uart_driver_install
and the failed write marked the UART bus failed for the whole boot.
Delete the override so the component uses the default DATA priority
like ld2410 and ld2450.
J. Nick Koston