PXX protocol

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15 Jun 2019 18:26 #74545 by Fernandez
Replied by Fernandez on topic PXX protocol
I can't find the test build but is it now in nightly's? I will also test it.

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16 Jun 2019 08:21 #74553 by Fernandez
Replied by Fernandez on topic PXX protocol
I tested PXX power and I can confirm it works including the auto power.

Range check I do not measure any RF from antenna but Rx still stay connected. So its very low power.
When at auto power, the power will be high when RX is off, but when Rx is connected the power will be reduced a lot.

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17 Jun 2019 15:00 #74555 by hexfet
Replied by hexfet on topic PXX protocol
Thanks for testing.

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15 Jul 2019 22:04 - 15 Jul 2019 22:05 #74746 by ZeroFPV
Replied by ZeroFPV on topic PXX protocol
I've found another bug, I think. That it's only happening in PXX mode I post it here.

My current version:
deviation-devo7e-v5.0.0-28ce50f

I added 2 3-position switches to my Devo 7E (hardware.ini extra-switches=3x2).
When I selected a model with PXX protocol one of the switches is showing strange behavior.
If I switch the left one to the middle position (A1) trim will be applied to the Roll stick as long
as the switch is in that position.

I don't have this problem on models with different protocols (e.g. FrSky X).
Also the problem only occuring if there is really a module connected (R9 in my case) to the trainer port.
Last edit: 15 Jul 2019 22:05 by ZeroFPV.

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16 Jul 2019 23:24 #74751 by hexfet
Replied by hexfet on topic PXX protocol
Quite strange. Don't see anything in the code that would explain this.

This mod doesn't require any soldering to the processor, right? No chance of any shorts to the trainer port or trim button?

Please test if you get the same behavior with the SBUS and SUMD protocols. It won't hurt the R9 to send these signals to it.

Was the test done with a fully charged battery? Can you try with external power to the R9?

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17 Jul 2019 06:04 #74754 by Fernandez
Replied by Fernandez on topic PXX protocol
Try if it occurs also in rangecheck mode. High power UHF may cause RFI pick up on long cables, detecting false switching.

Potentially dangerous, but all our transmitters are pretty poor in RFI design.

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17 Jul 2019 12:33 #74755 by ZeroFPV
Replied by ZeroFPV on topic PXX protocol

hexfet wrote: Quite strange. Don't see anything in the code that would explain this.

This mod doesn't require any soldering to the processor, right? No chance of any shorts to the trainer port or trim button?

Please test if you get the same behavior with the SBUS and SUMD protocols. It won't hurt the R9 to send these signals to it.

Was the test done with a fully charged battery? Can you try with external power to the R9?


Hello! Thanks for the feedback!
The mod doesn't require any soldering, that's right. I'll check the connections of the Switch mod but I doubt to find any shorts.
power the R9 externally only. I use two 3000mAh 18650 cells to do it. there is only a signal and ground connection to the Devo.

I'll try the other protocols as soon as I'm @home.

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17 Jul 2019 12:37 - 17 Jul 2019 12:50 #74756 by ZeroFPV
Replied by ZeroFPV on topic PXX protocol

Fernandez wrote: Try if it occurs also in rangecheck mode. High power UHF may cause RFI pick up on long cables, detecting false switching.

Potentially dangerous, but all our transmitters are pretty poor in RFI design.


Ohh, haven't thought on that. There are some relative long wires required for the switch mod. I'll try some shielding and lower output power.

Thank you! :)

EDIT: Haven't tried yet but that's probably it. I haven't had the problem before the Hotfix hexfet made for me and the Nightly I installed afterwards.
Before the fix there was only very low output power and the module had more distance to the Devo 7E.
Last edit: 17 Jul 2019 12:50 by ZeroFPV.

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17 Jul 2019 13:51 #74757 by Fernandez
Replied by Fernandez on topic PXX protocol
You could place some 100pf caps one at each switch matrix lines at devo side to gnd.
Or could try a "Ferrite Clamp" around the cable bundle?

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17 Jul 2019 21:52 - 17 Jul 2019 21:54 #74761 by ZeroFPV
Replied by ZeroFPV on topic PXX protocol
Sorry that I made you stress @hexfet.
It's like Fernandez thought. When I'm bringing a piece of aluminum foil between the Devo and the R9 Super 8 everything is working as it should. As soon I take it away the Devo starts to beep and is moving the trim. :D

Thanks again for all your input and sorry again @hexfet!
Last edit: 17 Jul 2019 21:54 by ZeroFPV.

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18 Jul 2019 00:09 #74763 by hexfet
Replied by hexfet on topic PXX protocol
No worries. Glad you got it sorted :)

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02 Aug 2019 09:41 #74823 by matbhe
Replied by matbhe on topic PXX protocol
Hello everyone

I was a lucky owner of a t8sg v2 plus with an r9m module.
Since a few days I have massive RFI problems - Buttons are clicking without input, trimming runs away and the voltage indicator jumps around.
I have already shielded the whole JR bay with aluminum tape but the only thing that helps is less output power (range test works also) or an aluminum foil between the transmitter and the r9 antenna.
Does anyone have an idea why this suddenly happens after about one year of flawless operation and what else I could do about it?
Thanks for any good tips.

Kind regards
Matthias

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03 Aug 2019 21:17 #74829 by Fernandez
Replied by Fernandez on topic PXX protocol
Maybe your antenna is broken? Or coax is damaged ?

If you plan to use any metal shielding, be sure it “well”, connected to gnd, so many hard connections to the main pcb gnd.

( as at uhf a wire of a few cm is allready am antenna, so connecting the shielding with a wire to ground does not work....)

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21 Sep 2019 03:05 - 21 Sep 2019 03:09 #75129 by joeclone
Replied by joeclone on topic PXX protocol
Was running test build 42d48d4 since Apr, but just now I think there's a bug. The dsm/dsmx protocols seems broken. Can't bind with my earlier dsm/dsmx models. I tried rolling back to the main branch 5.0 firmware and vlad_vy builds and both was able to bind with my dsm/dsmx models no problems.
Even tried the latest nightly builds and seem those too are broken with this same problem.
Last edit: 21 Sep 2019 03:09 by joeclone.

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21 Sep 2019 05:54 #75130 by vlad_vy
Replied by vlad_vy on topic PXX protocol
Can you try "Reference nightly build Deviation v5.x.x" ?

www.deviationtx.com/forum/builds/8508-re...ild-deviation-v5-x-x

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21 Sep 2019 06:39 #75131 by joeclone
Replied by joeclone on topic PXX protocol
I've tried www.deviationtx.com/forum/builds/8508-re...ild-deviation-v5-x-x

- dsm/dsmx protocol doesnt work
- PXX unavailable in the build

also tried www.deviationtx.com/forum/builds/6407-de...cols?start=480#75000

-dsm/dsmx protocol works
- PXX unavailable

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21 Sep 2019 07:56 - 21 Sep 2019 08:00 #75132 by vlad_vy
Replied by vlad_vy on topic PXX protocol
It's surprise, both builds have dsm/dsmx protocol code equal, except minor difference with telemetry parsing (RSSI telemetry).
Last edit: 21 Sep 2019 08:00 by vlad_vy.

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21 Sep 2019 08:15 #75133 by joeclone
Replied by joeclone on topic PXX protocol
Unfortunately I dun hav older 5.0 nightlies to try out, all the recent builds hav broken dsm/dsmx

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22 Sep 2019 17:18 #75138 by Moeder
Replied by Moeder on topic PXX protocol
do you use txid in your config? If yes this could cause your already bound rx not to work with the newer version.

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23 Sep 2019 00:31 - 23 Sep 2019 00:32 #75140 by joeclone
Replied by joeclone on topic PXX protocol
I've tried fresh bind multiple sats both dsm2 n dsmx all failed, also tried id none. And as a test when I flash to the main 5.0 firmware all sats were able to bind easily. Maybe someone can try this and confirm if the latest nightly builds have this problem?
Last edit: 23 Sep 2019 00:32 by joeclone.

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