Devo 12s 3in1 / 4in1 RF module neat installation.

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07 Jun 2016 19:46 #50125 by victzh
Replied by victzh on topic 3in1 / 4in1 RF module
@Deal57 what amount of traffic are we talking about? To pass isochronous audio data, as PhracturedBlue mentioned, is probably unfeasible - too much for already multiplexed bus. Short commands - possible. We need more information about the whole setup.

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07 Jun 2016 21:00 #50133 by HappyHarry
Replied by HappyHarry on topic 3in1 / 4in1 RF module
if the lna issue on the 4in1 still existed how far would the telemetry in a hubsan h107 work for?

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07 Jun 2016 21:13 #50136 by victzh
Replied by victzh on topic 3in1 / 4in1 RF module
It shouldn't work at all - insertion loss of the PA/LNA is around 60dB and PA being on adds noise - very short range.

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07 Jun 2016 21:23 - 07 Jun 2016 21:32 #50141 by midelic
Replied by midelic on topic 3in1 / 4in1 RF module
See 4in1 mod(first version)...to be
I'm very busy and have no time to do myself the modification so it is not tested.But I want to help
If somebody could do this mod he can post here. The resistors are not part of this mod (multiprotocol modification)
Cut trace there(pin12 to 3.3V) and connect 11 with 12 multiplexer pins together and write new routine for with CYRF. to change PA/LNA on A7105.
Attachments:
Last edit: 07 Jun 2016 21:32 by midelic.

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07 Jun 2016 21:40 - 07 Jun 2016 21:42 #50147 by HappyHarry
Replied by HappyHarry on topic 3in1 / 4in1 RF module

victzh wrote: It shouldn't work at all - insertion loss of the PA/LNA is around 60dB and PA being on adds noise - very short range.


then i can confirm the new 4in1's have the lna issue fixed for the a7105 as i'm receiving voltage telemetry to ~25m, i'll test farther distances tomorrow when it's lighter outside
Last edit: 07 Jun 2016 21:42 by HappyHarry.

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07 Jun 2016 22:57 - 07 Jun 2016 22:58 #50152 by PhracturedBlue
Replied by PhracturedBlue on topic 3in1 / 4in1 RF module
can you take a high-res image of the board? It doesn't make much sense, as the 4-in-1 boards with the fix shouldn't be available yet as I understand it. but a good pic of the board will identify it (you probably need to take the shield off 1st though). Even without the shield, removed, there should be an extra pin for the nrf connection on the new boards. Or maybe my current information isn't accurate
Last edit: 07 Jun 2016 22:58 by PhracturedBlue.

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07 Jun 2016 23:05 - 07 Jun 2016 23:35 #50153 by midelic
Replied by midelic on topic 3in1 / 4in1 RF module
Sorry I had it wrong.
Last edit: 07 Jun 2016 23:35 by midelic.

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07 Jun 2016 23:25 #50154 by HappyHarry
Replied by HappyHarry on topic 3in1 / 4in1 RF module

PhracturedBlue wrote: can you take a high-res image of the board? It doesn't make much sense, as the 4-in-1 boards with the fix shouldn't be available yet as I understand it. but a good pic of the board will identify it (you probably need to take the shield off 1st though). Even without the shield, removed, there should be an extra pin for the nrf connection on the new boards. Or maybe my current information isn't accurate


it's installed in my ult7e now, but it was only purchased direct from the seller about 2 weeks ago, and i'm definitely getting voltage telemetry from my led version h107L, here's the pics i have from during the install





i'm sorry but those are the best i have just now, i can take more tomorrow evening but pulling the shield may prove difficult due to the daughterboard, but i'll give it a bash.

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08 Jun 2016 01:00 #50157 by PhracturedBlue
Replied by PhracturedBlue on topic 3in1 / 4in1 RF module
that does indeed appear to be the new board (13 pins on the lower edge of the 4-in-1 module). I wasn't aware they were available yet. I can't confirm either the a7105 or nrf24l01 Rx is functional from the pic, but I guess you can

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08 Jun 2016 06:18 - 08 Jun 2016 06:30 #50160 by BirdBarber
Replied by BirdBarber on topic 3in1 / 4in1 RF module
Which would use less power on a 7e: the Devo version of the 4-in-1 with the original 7e CYRF removed, a fully populated Multi Module with the original 7e CYRF removed or using the original 7e CYRF (with range mod) and a Multi Module with the CC2500, 7105 and NRF installed?
Last edit: 08 Jun 2016 06:30 by BirdBarber.

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08 Jun 2016 07:49 #50163 by HappyHarry
Replied by HappyHarry on topic 3in1 / 4in1 RF module

PhracturedBlue wrote: that does indeed appear to be the new board (13 pins on the lower edge of the 4-in-1 module). I wasn't aware they were available yet. I can't confirm either the a7105 or nrf24l01 Rx is functional from the pic, but I guess you can


afaik these aren't readily available yet (no listing on taobao or banggood) cmPang kindly sourced this direct from the seller for me. I don't think I have any nrf based craft with telemetry (are there any?) so I can't test that out at the minute but I can test the range to be sure the pa is properly enabled

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08 Jun 2016 15:53 - 08 Jun 2016 15:54 #50179 by PhracturedBlue
Replied by PhracturedBlue on topic 3in1 / 4in1 RF module

BirdBarber wrote: Which would use less power on a 7e: the Devo version of the 4-in-1 with the original 7e CYRF removed, a fully populated Multi Module with the original 7e CYRF removed or using the original 7e CYRF (with range mod) and a Multi Module with the CC2500, 7105 and NRF installed?

Why are you concerned with power? is battery life on the 7e really an issue?
The answer is that a 4-in-1 with the 7e removed should use the least power, but that the difference between the 3 options should be quite small. the only significant source of power loss would be parasitics while the module isn't in use (very low) and any power loss through an LDO (which again is quite low when the modules aren't in use). I am not sure what Harry is using for an LDO, but victzh's board will have a standard LM1117 which isn't as efficient as a switching supply, but shouldn't be any worse than what was on the 7e originally.

Edit: I should note that the biggest risk of power loss would be improperly shutting down the modules when not in use which is a software problem rather than hardware.
Last edit: 08 Jun 2016 15:54 by PhracturedBlue.

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08 Jun 2016 16:25 - 08 Jun 2016 16:27 #50183 by wasp09
Replied by wasp09 on topic 3in1 / 4in1 RF module
@victzh

Updated N in 1 would be the difficult part to figure out.

Thanks.
Last edit: 08 Jun 2016 16:27 by wasp09.

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08 Jun 2016 16:46 #50184 by victzh
Replied by victzh on topic 3in1 / 4in1 RF module
@wasp09 Why?

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08 Jun 2016 17:03 #50187 by vmsda
Replied by vmsda on topic 3in1 / 4in1 RF module
In the 3in1 module, the pin numbers are odd in the top row and even in the bottom row, right to left in both cases, right?

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08 Jun 2016 17:05 #50188 by champstar2828
Replied by champstar2828 on topic 3in1 / 4in1 RF module
The 3 in 1 is now available on bangood. I'm not sure for how long this time.

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08 Jun 2016 17:50 - 08 Jun 2016 17:51 #50191 by HappyHarry
Replied by HappyHarry on topic 3in1 / 4in1 RF module

PhracturedBlue wrote: I am not sure what Harry is using for an LDO


I have no idea what's been used, the devo 4in1 takes 5v, so either the daughterboard or the 4in1 itself has a vreg in it, I'll maybe know more a little later on today when I have a look at opening it up
Last edit: 08 Jun 2016 17:51 by HappyHarry.

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08 Jun 2016 20:42 #50205 by HappyHarry
Replied by HappyHarry on topic 3in1 / 4in1 RF module
it doesn't look like i'm going to have time tonight to pull the rf board apart, but is there any nrf protocols that have telemetry enabled in deviation? or that require the receiving of packets to the tx to bind?

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08 Jun 2016 21:09 #50209 by FDR
Replied by FDR on topic 3in1 / 4in1 RF module
Doesn't necessarily need to have telemetry to test, it is enough if it uses ACK for handshake...

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08 Jun 2016 21:34 #50211 by goebish
Replied by goebish on topic 3in1 / 4in1 RF module
CX-10 "blue" PCB protocol has to receive a packet from the aircraft (RX ID) during bind.

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