While subscribed to an ESS characteristic, the sensor gets polled
every 3 seconds.

This makes the behaviour of the BME680 more predictable when measuring
in an irregular interval.

This allows to execute code which uses mutexes before the scheduler is
started. E.g. during early hardware init.

Basic work queue

See merge request !427

change(sdk): Update to 0.3.0

See merge request !426

See merge request !425

Signed-off-by: Rahix <rahix@rahix.de>

Closes #218

See merge request !422

Closes #204

See merge request !424

Update CHANGELOG

See merge request !420

Slight formatting cleanup to ensure the docs are rendered and linked
properly.

Signed-off-by: Rahix <rahix@rahix.de>

For some reason a portYIELD() is not enough to give the serial task the
option to run. I tried vTaskDelay() and that works. To not block more than
needed portYIELD() is still called when the queue is not full and only
call vTaskDelay() when it is full.

Closes #218

Closes #217

See merge request !421

The MSC interrupts can come in back to back, effectively blocking
the FreeRTOS timer task which resets the watchdog. This simple fix
simply resets the watchdog when performing an MSC read or write.

See merge request !419

See merge request !414