OpenLRSng scanner / spectrum analyzer. RCHacker #46

[@ostidetabarnak]

his name guys is carl, and the rx are made in his bathroom, not garage! lol im meetn him tomorow, im sure he will be happy you mentioned his work, thanks for the mention, keep up the awesome videos

[@cfrankfly]

Loved your demo and thoughts... I appreciate the actual data collection as opposed to opinions with out source.... Keep it up!

[@Rchacker]

It is enamel coated copper that I pulled out of an old AC motor. About 1.5mm. I can measure it exact but I do not think it matters that much. I like the enamel coating as it protects the module from static.

[@letsgocamping88]

Hi Marc, have found your videos very useful, I've especially enjoyed your moxon antenna video, I built my own tuned to 459MHz. In the video you explain that you shorted some pins out, which ones were they exactly, I didn't quite manage to grasp it from the video. Keep up the great work!

[@alanpowell328]

Marc, apart from the demo did you add the 11 hopping frequencies for any other reason - other than you can. Regards Alan.

[@Rchacker]

It can do transparent serial link however I don't think the data rate is very fast. I think you need to enable it in the source or perhaps the CLI. It is something I have not used yet.

[@garben63]

Hi Mark, can you tell me what the spec's are on the wire you are using to build your vee antenna's? Thanks for all your great videos.

[@RienMy]

Great video, nicely edited so we can see the differences!

[@alanpowell328]

Marc, you indicate that one of your modules needed the bootloader re-flashing. I have a HK RX module that appears to take programming but just does not work. I suspect the RF module on mine but what was your failure symptom?

[@sergioreyes3754]

Hi, i like your reviews of openlrs, but i would to know if its possible to use openlrs or openlrsng to connect the mission planner (mavlink) with APM 2.5 because i dont found information of how to do that, Thank you. Greetings

[@omsingharjit]

What frequency Rang ?

[@Rchacker]

I made a mistake: CTN wrote the scanner software. Carl makes the 4 channel receiver.

[@razbotics]

marc.,today I programmed my orange LRS 1 w TX module as TX and then I hit up the spectrum analyser tab on configuration n I don't see any graph and peak was at 0 MHz ....whereas when I program my 9ch 100mw Rx as TX and I can see graphs and peak at around 430 MHz...with this can u say which of the module is defective...

[@marclazarusgriffith]

+Shubhankar Das it is possible, range test with both is the best way to tell.

[@razbotics]

also i cannot bind both of them the Rx gets both LEDs on but the TX never hears that it got binded and therefore the blue LED with the buzzer keeps on blinking and buzzing....also can u guide me through range test

[@purge98]

at 15:18 you can see the yellow and green wires coming from the LiPo are about 1mm apart. He shorts these out and magic smoke eminates from the wires. It won't have done the LiPo any good and I would suggest storing it outside in case it burns down his house.

[@Rchacker]

No, just for the demo. The newest firmware is up to 25, and the hardware is capable of 256. More is not necessarily better so the default is 6 randomly chosen channels.

[@pa3dfr]

Hi Marc I cannot find the spectrum analyzer software I think the links no longer working Can you help?

[@marclazarusgriffith]

its part of the first link.

[@tonyblewitt6159]

Did this spec anal soft ware get removed? I want to use it but can't find it anywhere

[@Rchacker]

Looks like it is now a feature of openlrsng configurator. chrome.google.com/webstore/detail/openlrsng-configurator/focgpgmpinbadijfcdimbdkgnpndjnkl

[@UndCon]

LOL - the magic smoke - what did you short? great video as usual

[@Rchacker]

Sorry, my failure symptom was that I could not program it with the FTDI, so I flashed a new bootloader with the USBASP, then went back to using the FTDI. See my flashing openlrsng video.

[@randyneighbour]

great info and great video. you give us great video and you make things very easy to understand

[@Rchacker]

Cheers, the editing got a bit crazy, glad it was worth it.

[@Rchacker]

The usual problem is that it gets programmed with a 5V USBasp or a 5V fdti. If you are not guilty of that then perhaps HK are, and if they are guilty then there will be a whole batch of dud ones coming out. The ATMega happily runs at 5V but the RF module is max 3.6V. See if you can test that the voltage regulator is working OK with a multimeter. It converts the 5V from the rc inputs to 3.3V for the rest of the circuit. Or you can use a partially charged 1 cell battery and power it via the ICSP.

[@liposly]

It is possible, altough the original firmware can have trouble connecting and suffers from packet loss which degrades link quality. I got a branch of the openLRSng (continously merging in changes from kah's firmware, latest merge was with 3.1.3). You can achieve approx 700 bytes per sec (gives 20-22 packets per second) and no lost packets (unless RF fails) which is sufficient for positioning and decent artificial horizon. Check out: github.com/gitsly/openLRSng/tree/mavlink (add the h*tps).

[@ostidetabarnak]

ops, i ment to write- the guys name is carl, sorry, its late lol

[@0917bobb]

Great video

[@Rchacker]

The power leads. :)

[@alanpowell328]

Marc, thanks for t

[@johneh87]

Good video. Btw, Search for RTL-SDR in google. You can buy a ~25Mhz-~1.7Ghz spectrum analyzer for about 10USD on ebay. (including shipping). (search: RTL2832U R820T).

[@Rchacker]

I bought one of these way back, but it never arrived. Is the software as easy to use?

[@johneh87]

There are multiple software's available for this. I use SDR#(sharp), but it depends on how you want to use it i guess. its pretty simple to use There should be alot of guides on the interweb. I order mine from ebay, took about 1week to arrive.

[@kaen2099]

RCHacker the RTL-SDR software is WAAAAY better than what you're working with here. Considering you're doing this little with a $35 device, the $10 SDR dongle will do a much better job.