Hi
Two of my customers have trouble setting up the Pixhawk - I myself have a Pixhawk, but don't use a Futaba receiver, thereby I can't replicate the problem (I would like to find out if the problem is connected to the receiver they use, or something else).
Both use a Futaba R7008SB receiver.
Both managed to upload the Firmware to their Pixhawks - but they are not able to do the radio calibration (the Pixhawk doesn't "see" the receivers, the bars in the calibration are all grey).
They have nothing else connected to the Pixhawk, except receiver (connected to the right port / RC), buzzer, safety switch and USB cable.
The Pixhawk signals via the big LED "pre-arm check failed" (which makes sense ;)
They power the Pixhawk via USB and at the same time with a LiPo (via the Power Module).
The receiver is "found" by the remote, the LEDs are on, the setting of receiver and remote (regarding the use of the SBUS) seems to be right. They use the right port of the receiver to connect to the Pixhawk.
I am happy about any suggestions ...
Thanks a lot in advance
Felix
Replies
Hi Xian
it looks like your connection is correct. I asked for a picture because I have some customers who insisted that they hooked it up correctly, but later on a picture revealed that they had it wrong. I have some customers who reported problems with this type of receiver - but unfortunately I didn't hear back after giving them some advice, so I don't know if it works ...
I am using a different receiver with PPM Encoder, thereby I have not been able to reproduce the problem.
Xian, you used the wrong port. The labeling needs to be improved, but the manual that came with Pixhawk already tells you to connect the receiver to RC IN. The SBUS labeled port is Pixhawks own SBUS output port. It will be powered and work once you connect it correctly.
DO NOT POWER THE RECEIVER FROM ANY EXTERNAL POWER SOURCE OTHER THAN PIXHAWK.
Hi Lorenz, Could you explain why we should not power the receiver from any external power source other than the pixhawk?
Its fine if you power it from an external source, but you must not bridge the RC IN +5V to the servo rail - they are isolated and need to be. Rather than explaining this in detail and risking to confuse users, the recommendation is to not power the receiver from any other power source. Anyone with sufficient EE background should already understand the implications of separated rails and will be able to create any custom power setup as needed.
You already have a power on the receiver.
Are you try to connect S-BUS2, instead of S-BUS connection on the photo?
Oh! Try not miss understand the picture.
Here is better picture;)
DO NOT POWER THE RECEIVER FROM ANY EXTERNAL POWER SOURCE OTHER THAN PIXHAWK.
I can confirm it works with Pixhawk when connected to RC IN. I do not know if the last stable release of the APM software includes support.
Hi Lorenz,
which firmware version are you using on the Pixhawk (the one where it works)?
Are those files for Pixhawk though??
Mine works great on FrSky TFR8SB Rx
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