LibrePilot Forum
Development => Firmware General => Topic started by: sz on May 30, 2016, 10:10:35 am
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Hello,
I'm using ULRS for my RC models. With ULRS 2.x (http://www.itluxembourg.lu/site/ultimate-lrs-the-next-release/) LP doesn't recognize the PPM signal. Probably because (http://www.rcgroups.com/forums/showthread.php?t=2037442&page=251&highlight=cc3d#post33928817) of a short frame end of just 3ms. Ardupilot has no problem.
Is there maybe a way to get LP to work with ULRS? Would a feature request or issue be reasonable?
Thanks,
Sebastian
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Hi, welcome.
Please try the firmware attached with your CC3D.
You should use rescue for flash:
- disconnect board
- hit rescue button
- connect board
- Open button and browse where you saved the file attached
- flash
Anyway, register and create a Jira ticket here: https://librepilot.atlassian.net/projects/LP/issues
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thank you for your quick replay!
I installed your firmware, but it also can't read the PPM.
I assuming the PPM input on PIN 8.
See also the attached screenshots.
Sebastian
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The firmware i posted should allow 2.7ms pulses.
Try with another "normal" PPM receiver if works ?
Please check the ReceiverActivity, no need to populate the RCinput.
Go to UAVOBrowser > Data > ReceiverActivity
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The firmware i posted should allow 2.7ms pulses.
Try with another "normal" PPM receiver if works ?
This is my only PPM setup. I have to downgrade my TX/RX. Will try it later.
The Ardupilot on APM can read the PPM. Right now I have both (CC3D and APM) connected parallel.
Please check the ReceiverActivity, no need to populate the RCinput.
Go to UAVOBrowser > Data > ReceiverActivity
please see screenhot. It doesn't look well.
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Is a CC3D or a CC3D Atom ?
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CC3D
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Maybe you can try to setup the PPM input into the FlexiPort, just to be sure that not a Pin8/hardware issue.
Please create a JIRA ticket.
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How many channels do you send from Tx side ?
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The old ULRS firmware works.
16 chanels.
I will try the flexyport as input
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Should be 12 channels max
old ULRS firmware support less channels ?
Try reducing the number of channels in your Tx
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Just wanted to test the ULRS beta because i have a Txmodule 100mW but don't work.
No window after COM selection.
Beta software is a 60 days trial version ? :-[
Scary...
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Just wanted to test the ULRS beta because i have a Txmodule 100mW but don't work.
No window after COM selection.
I have to start the Software on one PC few times. There will be a new window at some time.
Beta software is a 60 days trial version ?
He says that he want to avoid a buggy version of his software. I assume there will be a stable version without limited time.
old ULRS firmware support less channels ?
yes, just 8.
Try reducing the number of channels in your Tx
I just configured 5 channels on openTX
Please create a JIRA ticket.
I will create a feature request for 16 channels. Like cleanflight (https://github.com/cleanflight/cleanflight/issues/343).
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We can do like others, but i wonder why 16 channels are needed ?
Try firmware attached.
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It works!
Thank you for your fast help and precise instructions!
We can do like others, but i wonder why 16 channels are needed ?
For me 8 channels are enough, but the ULRS developer seems to think 16 channels fix are better... I will ask him to optional choose between 12 and 16 channels.
I will still open a feature request via JIRA OK?
Thanks again a lot!
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yes, Jira.
16 channels are really not needed for a LRS link, this should add some latency.
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I created an improvement ticked (https://librepilot.atlassian.net/browse/LP-326) in JIRA.