PPM from Orange OpenLRS Rx

[bprodgers21]

Just curious if anyone here has had success using the PPM out from the Orange OpenLRS Rx. I've tried it with both a Naze32 and a KK2.1 board (not at the same time ), but neither recognizes the PPM signals from the Rx. Here's how I had it set it up:

Rx: Running latest version of OpenLRSng, jumper on signal pins of channels 7 and 8 per manual, using PPM out from channel 5/port 6. Limited PPM out to 8 channels in the Chrome configurator.

Naze32: Plugged into the three leftmost pins on the top row of the inputs per manual. Enabled PPM feature in CLI under Baseflight configurator.

KK2.1: Running Steveis 1.12? (don't remember exactly) beginner firmware. Enabled PPM in menu and configured channels to the order that my Rx is set up for (TAER, aka JR/Spektrum). Plugged the PPM cable into the aileron input pins.

Neither board is recognizing the PPM stream from the Rx. I've read things about sync time and pulse widths, but I haven't messed with these things yet. Anybody have some experience here that can offer suggestions? Thanks in advance.

 

[jhitesma]

I never even bothered to even try the stock firmware on my Orange openLRS and just went straight for openLRSng.

With ng I've had PPM working since the day after I flashed it. I had a few stumbles at first just over confusion between pin number and channel number to determine which pin I needed to connect to - but once I got it on the right pin it "just worked".

I did have problems when I tried setting it to 12ch and I did have problems when I damaged the arduino mega I use as a flight controller. But switching it back to 8ch solved the first problem and swapping to a mega board that hadn't been smashed under the weight of my quad several times solved the second.

 

[bprodgers21]

jhitesma, did you set up the Rx in "Forced PPM" mode or did you jumper the pins on Channels 7 and 8 to get PPM out? I'm beginning to wonder if I should reconfigure to "Forced PPM" and give that a try. I might also try another Rx, because the one that I'm currently using has been through a few crashes and has seen better days - but it works perfectly in regular (PWM) mode.

 

[bprodgers21]

I got it to work earlier tonight. I'll document what I did here - hopefully it'll help someone else out:

It turns out that jumpering the signal pins for Channels 7 and 8 does nothing - I suppose that the documentation I found on this is now outdated. I used the OpenLRSng chrome configurator to set Ch5 to PPM. I also limited PPM out to 8 channels. It worked like a charm after this. It's possible that limiting PPM-out to 8 channels isn't necessary - I changed both things at once so I don't know for sure.

 

[DTF UHF]

The jumpers haven't done anything in a while, all settings are changed via the Chrome configuration tool now. Check out the wiki instruction manual: https://github.com/openLRSng/openLRSng/wiki and get the chrome app here: http://goo.gl/iX7dJx

 

[hoggdoc1946]

OpenLRSng/FrSky Taranis/DJI Naza M V1 updated to V2 Firmware

The jumpers haven't done anything in a while, all settings are changed via the Chrome configuration tool now. Check out the wiki instruction manual: https://github.com/openLRSng/openLRSng/wiki and get the chrome app here: http://goo.gl/iX7dJx

OK are you saying that I need to enter into the Chrome configuration User Interface and change something in the RX setup to make it output PPM on Pins (6) Channel 5? Is there anything I need to do to the TX module setup.

Wayne aka HD/hoggdoc1946

 

[hoggdoc1946]

I got it to work earlier tonight. I'll document what I did here - hopefully it'll help someone else out:

It turns out that jumpering the signal pins for Channels 7 and 8 does nothing - I suppose that the documentation I found on this is now outdated. I used the OpenLRSng chrome configurator to set Ch5 to PPM. I also limited PPM out to 8 channels. It worked like a charm after this. It's possible that limiting PPM-out to 8 channels isn't necessary - I changed both things at once so I don't know for sure.

Gee I hope I don't have to reprogram the TX module as I can't find the darn programming dongle I bought for that purpose. I had it to flash 3 RX and 2 TX now I can find the darn thing. It's hell getting old friends.