Mixer Channel Order

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09 Apr 2016 08:36 #46157 by Crossrock
Mixer Channel Order was created by Crossrock
My flight controller and devo rx differ and I'm not sure which way to order the channels in the mixer screen. In my flight controller Aileron is channel 1 and Elevator is channel 2. My Devo RX 802 has these reversed. (I've set them up to match by swapping AIL and ELE.) My question is in the Advanced mode mixer screen should the list be as per the flight controller or the receiver. I'm thinking the obvious answer is it should be same as the flight controller ? Am I over thinking this? :silly:

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09 Apr 2016 10:25 #46164 by Thomas.Heiss
Replied by Thomas.Heiss on topic Mixer Channel Order
What flight controller? Does it support a setup GUI and channel monitor? Can you give a link to a screenshot?

The advanced mixer screen shows the channel order (and names) according to (fixed) DEVO or DSMx protocol definitions.

I do not understand why you would want to connect FC ail/ch1 to RX802 elevator/ch2.
Does your FC only show ch1, ch2... or does it show aileron, elevator, etc.?
If the latter I would try to follow all channel names from Devo mixer to the RX802 and to the FC.

I have not yet tried to directly edit the model.ini and change the names or channel order.
If the first I personally would try to match up the FC CH1 to advanced mixer channel ch1.

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09 Apr 2016 11:56 #46167 by Crossrock
Replied by Crossrock on topic Mixer Channel Order

Thomas.Heiss wrote: What flight controller? Does it support a setup GUI and channel monitor? Can you give a link to a screenshot?

The advanced mixer screen shows the channel order (and names) according to (fixed) DEVO or DSMx protocol definitions.

I do not understand why you would want to connect FC ail/ch1 to RX802 elevator/ch2.
Does your FC only show ch1, ch2... or does it show aileron, elevator, etc.?
If the latter I would try to follow all channel names from Devo mixer to the RX802 and to the FC.

I have not yet tried to directly edit the model.ini and change the names or channel order.
If the first I personally would try to match up the FC CH1 to advanced mixer channel ch1.



The flight controller is labelled AIL/ELE/THR/RUD etc.... I've wired to receiver as marked ELE/AIL/THR/RUD. In the mixer I have it as A/E/T/R but I'm thinking it should be E/A/T/R same as receiver because the commands go from TX to RX to FC. Booom do'in my head in :woohoo:

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09 Apr 2016 14:08 - 09 Apr 2016 14:09 #46173 by Thomas.Heiss
Replied by Thomas.Heiss on topic Mixer Channel Order
You still didn't name the FC or give link / screenshot.

The advanced mixer for DEVO protocol sets it as
1-ELEV
2-AIL
3-THR
4-RUD
5-GEAR
Ch6
CH7
CH8

I would use that for the DEVO receiver as well as.

Personally I would try to connect
RX 1-ELEV to FC 2-ELEV
RX 2-AIL to FC 1-AIL
RX 3-THR to FC 3-THR
RX 4-RUD to FC 4-RUD

In the end you need to make sure that AIL and ELEV mappings are setup correctly, really work for the correct channels (what you control on the sticks) and are really mapped as the FC setup GUI requires it and that the FC does its correct job for gyro compensation and direction of roll and nick (like FBL heli).
Maybe you can also rearrange something within the setup GUI of the FC.

But try to stick to AIL<->AIL and ELEV<->ELEV naming conventions and not CH 1/2 numberings.

But again: That might be FC dependent so you better give more detail infos what FC you use.
Maybe someone already has practical experiences with THIS FC.
Last edit: 09 Apr 2016 14:09 by Thomas.Heiss.

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09 Apr 2016 19:32 - 09 Apr 2016 19:33 #46212 by mwm
Replied by mwm on topic Mixer Channel Order
The FC is the crucial issue here. From what I've heard, some of them are hard-wired to AETR, so if you use DSM (TAER) or Devo (EATR), wiring things up as documented will leave things broken.

You can fix this in either the Rx/FC connection (only if you're using PWM) or in deviationTx by reordering the mixer. Personally, I'd do the latter. This means you can switch to a single-wire protocol without changing anything but those connections. it means the labels on the aircraft are correct. While the channel labels in deviationTx are wrong, the mixer page shows you the first input on each mixer as well as the channel label, so you can see that it's been corrected there.

And we've had multiple requests to allow changing the labels on the channels, but it isn't likely to happen. You get the actual input label in them mixer, so doing so doesn't add information(*), and the existing labels match physical labels on hobby-grade Rx's.

*) Ok, it could if you're doing something unusual. On my yachts the channels are either Rudder and Sheets, or Rudder, Mainsail and Foresail. So I would get extra information from changing the labels. But even as someone who gets a real benefit from this, I'd still rather have the labels match my Rx's. If I really wanted the labels, I could get them via virtual channels.

Do not ask me questions via PM. Ask in the forums, where I'll answer if I can.

My remotely piloted vehicle ("drone") is a yacht.
Last edit: 09 Apr 2016 19:33 by mwm.

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09 Apr 2016 22:20 #46230 by Crossrock
Replied by Crossrock on topic Mixer Channel Order
Attached are pics of JIYI P2Pro FC and mixer showing the changes I made :)


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