No RC input (Taranis9XD+, X8R SBUS)

PIXHAWK 3 PRO
#1

Hello every body,

I am facing a problem with my piwhawk 3 pro.

I have downloaded the last version of QGC (3.2.4). I would like to set up my drone (hexa) with the last stable version of PX4 (1.6.5dev). The firmware was downloaded successfully on the board. So when I want to calibrate the radio I cant. It does not find any channel…

When I plug the board to QGC I have an error message “Failed to communicate with IO, abort.”

I looked at the Mavlink console with “px4io status” and nothing because I have to start it. So, I enter “px4io start” and the message is “Failed to communicate with IO, abort.” or “IO protocol/firmware mismatch, abord.”

I searched for several hours but I can’t succed to find the solution. I think this error very weird with the last stable release…

I hope you could help me.

#2

Hello,

Could you try to force the update with the console? The command would be “px4io forceupdate”. What is the output in that case?

Thanks.

#3

Hi,

Thank you for you answer Kevin.

I tried to enter the command you give me and I have this: “WARN [px4io] usage: px4io forceupdate MAGIC filename”

After that, use “px4io statut” and I have this:

nsh> px4io status
WARN [px4io] loaded
protocol 2147483648 hardware 2147483648 bootloader 2147483648 buffer 2147483648B crc 0x8000000080000000
2147483648 controls 2147483648 actuators 2147483648 R/C inputs 2147483648 analog inputs 2147483648 relays
14662 bytes free
status 0x0000 SAFETY_SAFE RC_FAIL FMU_FAIL MIXER_FAIL ARM_NO_SYNC INIT_FAIL
alarms 0x0000
actuators
servos
reversed outputs: [] trims: r: 0.0000 p: 0.0000 y: 0.0000
0 raw R/C inputs
R/C flags: 0x0000
mapped R/C inputs 0x0000
ADC inputs
features 0x0000
arming 0x0000 FMU_DISARMED IO_ARM_DENIED
rates 0x80000000 default 2147483648 alt 2147483648 sbus 2147483648
debuglevel 2147483648
controls 0:
controls 1:
controls 2:
controls 3:
failsafe
disarmed values
IMU heater off
nsh>

Does it could be a bootloader issue ?

#4

It looks like the IO processor could not be updated through its bootloader. Somehow the command forced it, did you try again with the RC input?

#5

I tried to use the Radio an nothing.

When I want to calibrate the radio, it’s like if I didn’t connect anything. I can read “Detected 0 radio channeles…”

I tried the command “px4io test” and It faild with error no=2 :

ERROR [px4io] failed to open device
ERROR [px4io] Task exited with errno=2

#6

We have seen cases where a bad power supply could cause this behaviour. Could you try using a good USB cable? Could you also try to do the same operation while powered with a battery?

#7

I tried with an other computer and it is the same. I have got a problem and can’t communicate with I/O.

If I try this operation while the battery is plugged, I can’t upload the firmware, the operation stop.

#8

It is difficult to diagnose the problem without more elements, could you please open a ticket there so you can return it? We will analyze the problem, and repair or send you a new one.

#9

Ok, thank you Kevin. I am going to do that.

#10

Hi Kevin,

Sorry to ask you about my problem by this way.

I did what you said by opening a ticket but I have not any answer for a month…

Maybe you can help me ?

Regards,

CBB.