1.7.9 downgrade "Sensor Error" Fixed

[KennethMcNutt]

Just some background....
When some Drones were updated from 1.6.8 to 1.7.9 they got "sensor errors"... (IMU & compass) So DJI released 1.7.94 to fix them..
So....I have just found your ... Solution???
It was simple??
But it has to be done in this order..
Assuming you're still at 1.8.1..
If you are 1.8.1 + debug it first...
Then...
Downgrade to 1.7.9.. Get the error... Restart Still Sensor error...

Rerun F/w 1.7.9 with debug... Still Sensor error...Cal the Imu (yep)... still get the error...

Update with 1.7.94 No more error??
Recal Imu
This is the setups I just took to fix it for a member of my group...
So I am not Sure if the first IMU cal was anything more... then a waste of time...
Link to 1.7.94
P3C_FW_V01.07.0094.bin
Revised P3s Debug downgrade How to...
If you have v1.08.10 with a +
Then start here
v1.08.10 -> v1.08.10 + Debug
v1.08.10 -> v1.07.9
v1.07.9 -> v1.07.9 + Debug
(v1.07.9 -> v1.7.94 If you get "Sensor Error" if not skip this step...) I am waiting for clear info on the next step from here for further downgrade..
v1.05.7 -> v1.05.7 + Debug
v1.05.7 -> V1.5.75 If you get "Sensor Error" if not skip this step...) I am waiting for clear info on the next step from here for further downgrade..
and So on.. Here is a list..
v1.0.14
v1.0.17
v1.0.2
v1.01.3
v1.02.4
v1.03.5
v1.04.6
v1.05.7
v1.5.75
v1.06.8
v1.07.8
v1.07.9
v1.7.94
v1.08.10
There is new and older Firmware Versions not listed... Anyone Know them?
Links are hard to find..
1.7.94 link
P3C_FW_V01.07.0094.bin
1.5.57 link
P3C_FW_V01.05.0075.bin
The rest listed are here
DJI Phantom Accessories & Tips - Phantom Help

 

[KennethMcNutt]

It seems that the Sensor errors comes back after 1.7.94 downgrade?? and is not fixed again with 1.5.75.. So here are some suggestions to try to get to 1.5.7 when you get Erorrs on 1.7.9..
Some have used the Debug with a downgrade version ...
Meaning while you have 1.7.94 no erorrs.
(1) put 1.5.7 and debug on the sd card.. and downgrade like that..
(2) skip 1.6.8... D/G 1.7.94 > 1.5.7.. get error?
(3) debug 1.7.94 > 1.6.8 error?
(4) debug 1.7.94 then > 1.5.7 error?
Attempt this only if your getting Sensor Erorrs on 1.7.9..