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Plane: update release notes for 3.8.5

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Andrew Tridgell 2018-04-25 20:05:50 +10:00
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ArduPlane/release-notes.txt
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Release 3.8.5beta1, 16th January 2018
--------------------------------
Release 3.8.5, 25th April 2018
------------------------------
This is a minor release with three new features, all related to
airspeed.
This release includes small bug fixes and one safety fix. The changes
are:
The first is to support the MS5525 sensor on multiple I2C
addresses. Two new values of the ARSDP_TYPE are introduced (4 and 5)
for specific I2C addresses. This allows you to deconflict the MS5525
from a MS5611 barometer on the same bus.
- fixed an issue where the external safety button can activate in
flight on some boards, causing them to crash. A new parameter
BRD_SAFETYOPTION is added which controls the behaviour of the
safety button. The default is to de-activate the safety button when
armed.
The second is the addition of a driver for the SDP33 airspeed
sensor. This is an interesting sensor sold by Drotek that doesn't need
zero offset calibration for each flight. It is still considered
experimental.
- fixed default orientation of ICM-20948 compass for Here GPS
The third new feature is dual airspeed sensor support, which allows
you to have two independent airspeed sensors. At the moment the
failover between the sensors is very simple (it will only failover if
the primary stops communicating). More sophisticated failover methods
will be introduced in the future. To enable a 2nd airspeed sensor set
the ARSPD2_TYPE parameter to the type of the 2nd sensor. You can
combine any types of sensor.
- added support for dual airspeed sensors
- added support for the SDP33 airspeed sensor. This is still
considered experimental. There are reports of it underestimating
the aircrafts speed at higher altitudes.
- add support for the MS5525 airspeed sensor on multiple I2C
addresses. Two new values of the ARSDP_TYPE are introduced (4 and
5) for specific I2C addresses. This allows you to deconflict the
MS5525 from a MS5611 barometer on the same bus.
Release 3.8.4, 9th January 2018
-------------------------------