Plane V3.6.0 reads Spektrum SRXL input incorrectly

@jrandle wrote:

I have been using a genuine 3DR Pixhawk and a Spektrum AR7700 receiver with no problems in my existing aircraft. The receiver is connected to the Pixhawk via its SRXL output.

I have been using Plane V3.5.2 with no problems.

I am now trying to replicate this setup for a second aircraft. In Mission Planner 1.3.38 Under Install Firmware the latest version of Plane is 3.6.0 Tried to find 3.5.2 under the Previous Versions but it was not visible. Next most recent version was 3.5.0

I Installed 3.6.0 but the throttle channel and Flight Mode Channel (5) kept bouncing around in terms of the measured values. I recalibrated Radio twice but pointless when the values keep bouncing around. I plugged a servo in to the Gear Channel (5) and there were no jumps in the output. I don't think there is a problem with the receiver.

I then tried an identical new receiver and had exactly the same problem. The servo plugged in directly was also fine,.

I then installed Plane version 3.5.0 and it works perfectly, no jumping on Throttle or Flight Mode.

I can only conclude that something to do with reading the Spektrum receiver port changed in version 3.6.0 even though there is no mention of it in the the revision notes.

I hope somebody can help.

I have since installed MP 1.3.39 and more previous versions are visible, including 3.5.2. I have installed this and it works fine. However, if the bug is not fixed I will never be able to upgrade to a future version !!

I did post this Issue on Github a few weeks ago but nobody seems to have noticed so I thought I would try here for some help.

Thanks,
Jeremy

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