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Thank you for your answers!
You actually made a great system description - I just missed that page in your blog. Sorry about that. And now it looks really very interesting to me! I'm going to try it now and I believe you did a great job for making this FW. I will try to spread info of this system as wide as I can. I hope that soon it will be the most popular thread for LRS systems at rcg  It wold be still great to see some clear and easy to understand comparison with OpenLRSng and UltimateLRS in terms of main specifications such as a delay and link distance. I'm afraid they gonna suffer! As for the features request at the moment the most interesting would be SBUS and PPX in support . In regard to video issue I only can say that a friend of mine got max distance only about 7km with patch antenna and 1W 1.3 TX when switched to Crossfire from Rmilec. He climes that before he easily flied for 30km with this setup. There might be of course another reason for that. |
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Maybe telemetry would be nice, but i'm not sure - just testing stuff. Well, actually telemetry is only reason why i would migrate, i think (for tracker, instead of audio modem). Still, would be nice to get another band (keep 433MHz for current LRS, 868MHz for another system, which is tested). I would get modules immediately if you add support for 868MHz band. Quote:
Yes, if it's AP copter - "It's on NAZA"; if it's plane - "It's on APM". In reality ppl use so much different stuff... ;-) |
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Sadly, ULRS has hit a real speed bump now that we have found that the HopeRF RFM23BP module on which it is based is really pretty poor and not reliable when powered such that it outputs 1W. It looks like it may be fixable with some truly difficult SMD repairs. I had spent a fair amount of time and $$ before this came to light -- and I probably would not had I known.
Are these modules reliable at full power -- they look a lot better than the RFM23BP. Hardware-wise they just seem much more robust than combining an Amtel 368 and HopeRF23BP. Much of the efforts with ULRS have been consumed with DIY hardware -- this does not seem to be the case here. Has anyone achieved long range with them? What is the latency? All looks very promising. |
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Regarding your friend's video issue, i can only say that using 400mW 1.28Ghz Video TX there is no way, to achieve more then your friend did, with pretty clear video. The problem must be related to wiring, try to use separate BEC for LoRa RX. Another issue could be related to ground loop... Good luck! |
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Regarding PPM output, as you see, there are no more pins available, the goal of the project was to use existing hardware, limit costs, etc. No wiring arduino mini or other kit.. If you have single PIN without hardware inverter you can only implement CPPM, no chance for SBUS..... |
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I've seen SBUS encoder made on Arduino that works perfectly without hardware inverter. I don't know how is it possible - but it works.
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Thread OP
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Last edited by qczek; Jun 23, 2017 at 12:42 PM.
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Not sure were it was, but I will try to find.
For a moment it seems like I have some troubles with a servo control. It has a huge jitter and it moves in a very strange way compared to the stick movement. Servo is hot and smells burned. But when RX goes to FS state, servo changes it's position and the jitter stops. Different servos give the same result. Please have a look.
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I hope so as I didn't change noOfCPPMChnls and it supposed to be 0.
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No I didn't. I'll try now.
Do I need to save it for TX as well? UPD Damn! It was not zero! It was 8!!! |
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Yes, it works now like a charm! And the delay is really small! That's wonderful!
Thank you. It's amazing how it's easy to make an LRS now! (Or even one can say ULRS )I'm waiting hard to test it now. BTW, may I also suggest another nice future - automatic power control based on RSSI. |
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