RC chnl [SBUS] of Pixhawk in MP has no respose to TX

ArduCopter Copter 3.1
1

RC channel [SBUS] of Pixhawk in mission planner has no respose to transmitter

Today I set up my quad with pixhawk，flowowing the instructions on this site

copter.ardupilot.com/wiki/initia … -hardware/

ererything is OK until I begin to calibrate my radio.

I use Futaba T14SG as transmitter, and R7008SB as receiver.

Before installing the R7008SB, it has already been set working in SUBS mode.

And the T14SG is set as

  1. channel 1 roll

  2. channel 2 pitch

  3. channel 3 throttle

  4. channel 4 yaw

  5. SG (3 position switch)

I can see the SBUS signal in the oscilloscope.

I connected the channel 8 [SBUS] of R7008SB to RC channel of pixhawk.

After I click the calibrate radio button and 2 OKs, I move the sitcks of the transmitter, the MP has no response.

I make two vidios about my work.

Please help me about this problem!

Tnanks in advance!

[youtube]https://www.youtube.com/watch?v=62jVJnWNM3g[/youtube]

[youtube]https://www.youtube.com/watch?v=HJZBIKz7V6w[/youtube]

2

I thought I answered this question already but I don’t see my reply so I’ll try again.

SBUS is only supported in the latest version, AC3.1.1 which just went out today so if you’re not using that you might want to upgrade.

We only support SBUS not SBUS2. That receiver looks like it’s SBUS2!

3

Thanks, I will download 3.1.1 and have a try today.

It is SUBS, as shown in the picture below, SUBS2 needs another horizon slot.

Thanks aganin!

http://v1.freep.cn/3tb_140127095704adsp512293.jpg

4

[quote=“rmackay9”]I thought I answered this question already but I don’t see my reply so I’ll try again.

SBUS is only supported in the latest version, AC3.1.1 which just went out today so if you’re not using that you might want to upgrade.

We only support SBUS not SBUS2. That receiver looks like it’s SBUS2![/quote]

I tried 3.1.1 just now, It still can not work!

Anyway, thanks for your help!

I ordered a pwm to ppm converter, and I will try it later!

5

I guess you haven’t wiped the SD card and unplug telemetry before upgrading AC 3.1.

Rob and I also had this problem before. Try this and I think it will be fine. If the problem still exists, try a PX4IO force upgrade after flashing 3.1.

Actually s.bus was already supported back to 2.x i guess because I was using my Futaba with 2.9 as far as I can remember. s.bus2 may work as well, I kind of have tried my 7008SB but can’t remember.

Hope that helps.
Xin

6

Aha, thank you for your reply!

I bought a ppm encoder and everything was OK!

I will try your suggestion later!

Thank you again!

[quote=“gsenroc”]I guess you haven’t wiped the SD card and unplug telemetry before upgrading AC 3.1.

Rob and I also had this problem before. Try this and I think it will be fine. If the problem still exists, try a PX4IO force upgrade after flashing 3.1.

Actually s.bus was already supported back to 2.x i guess because I was using my Futaba with 2.9 as far as I can remember. s.bus2 may work as well, I kind of have tried my 7008SB but can’t remember.

Hope that helps.
Xin[/quote]