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16  Community / Exhibition / Gallery / Re: Cheap UHF spectrum analyzer (and RC tx rx) using RFM22 module on: November 18, 2012, 10:07:41 pm
I started using your new code and the issue was fixed. But I was curious about was causing it in the older version.

I already implemented PPM but it makes the RF22 stop working.
I've set the timer1 to do the work, similar to what the Servo library does, so shouldn't be any issue...

If there is interest maybe host this somewhere, google code or github.
17  Community / Exhibition / Gallery / Re: Cheap UHF spectrum analyzer (and RC tx rx) using RFM22 module on: November 18, 2012, 01:31:00 pm
Thanks.
In the mean time went back to some code you had shared before and changed it to include downlink telemetry. (I really didn't like openLRS code)
But I'll use the one you shared now that is better tested than mine. smiley

One question, on your old code that you shared I was getting servo glitches at a regular interval, any idea what was it (I suppose it was the RF22 irq messing the servo library?
I didn't spent much time as I need to generate instead a PPM signal (for the Multicopters FC's) but I was curious about it
seems like the

One other thing, do you get a stable RSSI reading? I'm getting something like 104, 80, 70, 90, 60,... ended up adding a moving avg filter to help. I was expect some fluctuation but not so big as this.
18  Community / Exhibition / Gallery / Re: Cheap UHF spectrum analyzer (and RC tx rx) using RFM22 module on: November 14, 2012, 04:20:41 pm
Here it is: http://www.xrotor.net/wp-content/uploads/2012/11/FrSky_Telemetry_Mwc.c
This is the main code for the FrSky telemetry. The data sources are mostly the sensors from the Multiwii board.


I'm currently updating the code from thUndeadMod v.4 for the openLRS to be able to use it with these boards. Hope to
run the first tests next weekend. smiley

19  Community / Exhibition / Gallery / Re: Cheap UHF spectrum analyzer (and RC tx rx) using RFM22 module on: November 14, 2012, 04:19:28 pm
Here it is: http://www.xrotor.net/wp-content/uploads/2012/11/FrSky_Telemetry_Mwc.c

This is the main code for the FrSky telemetry. The data sources are mostly the sensors from the Multiwii board.

20  Community / Exhibition / Gallery / Re: Cheap UHF spectrum analyzer (and RC tx rx) using RFM22 module on: November 14, 2012, 10:30:54 am
There is already implementations of the protocol in the Multiwii Flight controller that run in arduino so it would be basically copy/paste.
I've hacked the current code to add it and it fits perfectly in 328p already full with the Mwc code.
I'll upload it to my site later today so that you can give a look.

I'm currently using BT like you said, on my 9x I made a converter from RS323<>TTL and I plug it in the back of the radio.
And at the same time you still have it showing in the 9X LCD.


On my 9C because it has a FrSky DIY kit inside I actually placed the BT dongle also inside the radio. So it becomes a much cleaner solution.

So far I've hacked one fo the existing frsky apps to add what I needed, log rssi:



But I'm not too happy and I have some other ideas on what I want to do.

PS: I was also looking into putting a buzzer in the TX PCB to signal low RSSI as FrSky does. I've received today a spare ATMEGA from Farnell along with the resistors to swap. So I'll be giving total attention to this in the upcoming weeks. smiley
21  Community / Exhibition / Gallery / Re: Cheap UHF spectrum analyzer (and RC tx rx) using RFM22 module on: November 13, 2012, 12:08:18 pm
@Zitron, I see that you mentioned you've added telemetry to the code. Is that a custom implementation?

I was considering using the FrSky protocol, I have a 9X modded to get FrSky telemetry as well as a Android app in the works.
22  Community / Exhibition / Gallery / Re: Cheap UHF spectrum analyzer (and RC tx rx) using RFM22 module on: November 12, 2012, 03:55:18 am
Funny, I had to put this project on hold. But yesterday I picked it all up and finished to assemble the boards.
Seems I'll have to do some more modifications. smiley

@zachwiej, check here for example: http://fpvlab.com/forums/showthread.php?3156-433MHz-Half-wave-dipole-for-LRS
23  Community / Exhibition / Gallery / Re: Cheap UHF spectrum analyzer (and RC tx rx) using RFM22 module on: July 17, 2012, 05:35:25 pm
The original Futaba module has a trick to tell the radio that the module is plugged.

See here: http://www.rcgroups.com/forums/showpost.php?p=3954001&postcount=2
24  Community / Exhibition / Gallery / Re: Cheap UHF spectrum analyzer (and RC tx rx) using RFM22 module on: July 10, 2012, 02:48:52 pm
I opened my 35Mhz module and inside I find a PCB covered with a metal casing.

Measuring: 34.08 x 53.75 x 17mm

25  Community / Exhibition / Gallery / Re: Cheap UHF spectrum analyzer (and RC tx rx) using RFM22 module on: July 09, 2012, 06:00:28 pm
A Futaba module would be perfect. (I have a 9C) smiley
If needed I can measure the module box.

The only thing is that the module has a odd pin spacing for the connector.


Btw one cool thing would be to have a smaller RX pcb, will less pins to be able to easily fit into a plane, quad,...

26  Community / Exhibition / Gallery / Re: Cheap UHF spectrum analyzer using RFM22 module on: June 22, 2012, 08:21:27 pm
I'm back home and ready to finish the other boards.
I do plan to make this a TX/RX set, using it as a Frequency scanner was just an extra and a easy way to test.

I'll see if I can finish a second board during the weekend to give it a try. smiley
27  Community / Exhibition / Gallery / Re: Cheap UHF spectrum analyzer using RFM22 module on: June 05, 2012, 05:40:14 pm
Almost ready to start testing.
I forgot about the switch, so instead I'll use a jumper on this one.



This is really good stuff, super easy t build.
Great work zitron!


if I can give an idea. On the pin rows it would be good to have them all at equal spacing. I always have 2x3 or rows
of single pins and if the distance was equal it would be easy to solder them.
This way I have to split them all in single 3 pins.

Quick test made with my 900Mhz FPV vTX on chan 0.

28  Using Arduino / Networking, Protocols, and Devices / Re: RFM70 utilising the RSSI feature(access Reg.Bank?) on: June 02, 2012, 04:32:31 pm
You got any luck so far?
29  Community / Exhibition / Gallery / Re: Cheap UHF spectrum analyzer using RFM22 module on: June 02, 2012, 04:32:06 pm

That's a long time to wait! I have been flying my plane with the RFM22, it's working great so far.

Register 05 is write-only,  it's "RSSI Threshold for CD detect". You can't read the RSSI value from it.

Yes it is.. smiley-sad
And if I hadn't contacted them I wouldn't even knew what was going on.

That's right, I totally ignored the 'W'. smiley
But if it allows to seat RSSI report or not, it must have a way to read it.

Seems more are looking for it. smiley
http://arduino.cc/forum/index.php?topic=107699.0
30  Community / Exhibition / Gallery / Re: Cheap UHF spectrum analyzer using RFM22 module on: June 02, 2012, 02:43:27 pm
It's register 05 for the RSSI.

Btw, after almost a month I got an email saying that my RFM22 were shipped...
I had asked to include one of these cheap 2.4Ghz... but got no reply. :S

We'll I'm going to start assembling the boards as yesterday I got the solder paste and I expect the RFM's to arrive during next week.
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