Frsky compatibility
- mwm
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Arakon wrote: Thanks. I got a D4R-II on the way and just installed the CC2500 in my Devo 7e.. let's see if this'll work.
If you ordered one of the CC2500's from the ModuleList, it should work fine. I just ordered two more of D4R-II's, as HK tends to sell out of them quickly.
If you ordered a CC2500 that's different than those, things get dicey. In theory, there are some internal settings in the FrSky protocols that you can tweak if they have problems, but I don't know if that's been tested. But that will be an issue with any FrSky Rx and that module.
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- UKTamo
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Had a question re: telemetry, and was looking for an explanation of what's being displayed on the page? Bound with a D4R-ii.
Thanks for all the efforts.
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- Arakon
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mwm wrote:
Arakon wrote: Thanks. I got a D4R-II on the way and just installed the CC2500 in my Devo 7e.. let's see if this'll work.
If you ordered one of the CC2500's from the ModuleList, it should work fine. I just ordered two more of D4R-II's, as HK tends to sell out of them quickly.
If you ordered a CC2500 that's different than those, things get dicey. In theory, there are some internal settings in the FrSky protocols that you can tweak if they have problems, but I don't know if that's been tested. But that will be an issue with any FrSky Rx and that module.
I got the one from banggood, www.banggood.com/CC2500-PA-LNA-Romote-Wi...F24L01-p-922595.html
From what I read, that one should work, no?
Jon.m.barter had posted about it 2 weeks ago here in this thread and his works, so I am fairly sure mine will too.
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- NIcolas31417
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- Jon.m.barter
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I have had zero issues with the cc2500 from banggood, already insalled around 3 of them on different radios.
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- mwm
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midelic wrote: No these are the modules below.
Ali express module and BG one
They look the same but they are different.
www.aliexpress.com/item/CC2500-PA-LNA-wi...-2-4G/359941652.html
www.banggood.com/CC2500-PA-LNA-Romote-Wi...F24L01-p-922595.html
I believe the Aliexpress one have base channel frequency shifted(the famous offset),
The aliexpress one is the one recommended buy PB in the modules list.
The BangGood one is the one linked to in SebyDocky's tutorial video. I've tried playing with fine on mine, and managed to get the RSSI to be about 10 to 15% higher - whatever that means (Bueller?). It certainly didn't make any difference in the piss-poor range I was getting from FrSky.
If someone can tell me what that means, I'll verify that the same procedure works after I get a replacement. Of course, first I need to order a replacement. So the question is - which one should I order? The one recommended in PB's documentation that apparently needs FINE tweaked, or the one used by SebDocky to presumably do the FrSky RSSI work?
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- JaiCee
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I'm on deviation nightly v4.0.1-817a6ff and having troubles receiving telemetry from a FrSky D4R-II. I only seem to get telemetry if I rebind or sometimes when I bind to another model then go back to FrSky. Any suggestions what might be wrong?
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- Arakon
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Edit: Actually, seems to be the same issue as JaiCee has.. after binding, I get voltages + RSSI, but if I turn off both again, no more telemetry.
7e with 2cb43c0.
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- Arakon
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- robca
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2.4GHz signals have massive problems with mutipath reception, so I can imagine that any approximation of an RSSI signal when the Tx and Rx are close by will jump around a lot
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- SeByDocKy
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Arakon wrote: Also, is it normal for the RSSI value to fluctuate wildly? It's jumping anywhere from 65 to 98% for me even with the transmitter at rest and nearby.
Yes it's normal... packet[5] is normally a dBm value. I rescaled/mapped into [0-100%] but as you know loss is a quadratc function versus distance so ... it's normal to have huge variation in close distance. Maybe, it's possible to remap with a more adequate non-linear function but we need some FPU capaciities ... (or good DL approximation)
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- mwm
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SeByDocKy wrote: packet[5] is normally a dBm value.
dBm measure of what? S/SN ratio?
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- Arakon
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SeByDocKy wrote:
Arakon wrote: Also, is it normal for the RSSI value to fluctuate wildly? It's jumping anywhere from 65 to 98% for me even with the transmitter at rest and nearby.
Yes it's normal... packet[5] is normally a dBm value. I rescaled/mapped into [0-100%] but as you know loss is a quadratc function versus distance so ... it's normal to have huge variation in close distance. Maybe, it's possible to remap with a more adequate non-linear function but we need some FPU capaciities ... (or good DL approximation)
Ok, thanks. I don't consider the RSSI value that important anyways.. however, the voltage telemetry would be nice to have working. Any idea about the issue JaiCee and I have seen?
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- Jon.m.barter
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Devo 6s voltage bug:
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- mwm
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- Disabling the two modules in hardware.ini, and if that helps try them one at a time.
- Go back to 4.0.1 and see if it also displays the problem.
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- aMax
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Devo7e, TaranisQ X7, R9M , 4in1 MM, Futaba FC18plusV3.2 & DFT/FLD-02
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- Jon.m.barter
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- Posts: 51
Dont know if this helps anyone, but in the "errors" sheet, I got this:
[Hard fault]
devo6-v4.0.1-e1cdc10
R0 = 00000000
R1 = 00000030
R2 = 00000000
R3 = 0801ff09
R12 = 2000bf20
LR [R14] (subroutine call return address) = 080252c1
PC [R15] (program counter) = 080252c2
PSR = 01000000
BFAR = e000ed38
CFSR = 00000400
HFSR = 40000000
DFSR = 00000000
AFSR = 00000000
SCB_SHCSR = 00000000
Top of Stack:2000c000
Stack Detect:2000bf90
Backtrace:
2000bf9c : 0801ff09
2000bfa4 : 080252c1
2000bfb4 : 08025391
2000bfb8 : 0801ff09
2000bfbc : 0801ff4f
2000bfc0 : 0801ff09
2000bfc4 : 0802209d
2000bfcc : 08022467
2000bfdc : 0800ac0f
2000bfec : 0800acfb
2000bffc : 0802b485
Done
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- Jon.m.barter
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- mwm
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Do not ask me questions via PM. Ask in the forums, where I'll answer if I can.
My remotely piloted vehicle ("drone") is a yacht.
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- PhracturedBlue
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0x080252c0 => CC2500_Strobe
80252bc: f7ff ff88 bl 80251d0 <CS_LO>
0x08025390 => CC2500_Reset
802538c: f7ff ff94 bl 80252b8 <CC2500_Strobe>
0x0801ff08 => FRSKY2WAY_Cmds
0x0801ff4e => FRSKY2WAY_Cmds
801ff4a: f005 fa1d bl 8025388 <CC2500_Reset>
0x0801ff08 => FRSKY2WAY_Cmds
0x0802209c => PROTOCOL_DeInit
802209a: 4798 blx r3
0x08022466 => PROTOCOL_Init
8022462: f7ff fe0f bl 8022084 <PROTOCOL_DeInit>
0x0800ac0e => EventLoop
800ac0a: f017 fc6d bl 80224e8 <PROTOCOL_CheckDialogs>
0x0800acfa => main
800acf6: f7ff ff53 bl 800aba0 <EventLoop>
0x0802b484 => reset_handler
802b480: f7df fbd8 bl 800ac34 <main>
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