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Seppo's Discussions

Drones to become target practise for Australian farmers !

Started this discussion. Last reply by Greg Fletcher Mar 31, 2013. 1 Reply

Ran across an interesting thread discussing the proposed use of UAVs for cattle monitoring.I imagine it'd sure get expensive quick !    …Continue

RFD900, RFD900+ - New long range radio modem

Started this discussion. Last reply by Andrew Ferry on Tuesday. 732 Replies

Hi All,I would like to introduce you to a new radio modem that we developed for very long range datalinks!http://rfdesign.com.au/RFD900.phpSome of the…Continue

No GPS Altitude update on arduplane 2.27a / apmplanner 1.1.13

Started this discussion. Last reply by Seppo Jan 2, 2012. 2 Replies

Ran into some strangeness with the GPS altitude on the latest firmware.On initial bootup, GPS gets a 3D fix, and the altitude is correct on apmplanner.Taking off and flying, the altitude remains…Continue

Throttle weirdness on arduplane 2.26/ apmplanner 1.1.2 vs. normal on 2.24/1.0.88

Started this discussion. Last reply by Don Brooks Dec 9, 2011. 3 Replies

Gday,Things are fine with the old combination of arduplane 2.24/ APM planner 1.0.88With arduplane 2.26/ apmplanner 1.1.1 or .2, I can't get throttle settings to work.Have gone through…Continue

 

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Latest Activity

Andrew Ferry replied to Seppo's discussion RFD900, RFD900+ - New long range radio modem
"Hi we have just aquired a pair of 900x modems. What is the best way to get 16ch of ppm into the modem? I have seen some connections to pins in a JR style Tx module bay but that is a bit of an ugly solution. I like the idea of connecting a…"
Tuesday
Seppo replied to Seppo's discussion RFD900, RFD900+ - New long range radio modem
"Hi, The 900x supports up to 16 channels of PPM passthrough. Cheers, Seppo"
May 13
fred flintstone replied to Seppo's discussion RFD900, RFD900+ - New long range radio modem
"Fully support MAVLink up and down at 19200 at 1W each way same module set one as RX and the other as TX"
May 11
Marc Dornan replied to Seppo's discussion RFD900, RFD900+ - New long range radio modem
"Dragonlink v3 does all of that with full bi directional Mavlink. 12 channels. If you get the 1.5W RX you can also have 40km of range. Not DIY though. Google ULRS if you want DIY."
May 11
Roger Ronald replied to Seppo's discussion RFD900, RFD900+ - New long range radio modem
"Michael, Thanks for the scope shot. I'll note that it appears to show 9 channels and I have heard other people indicated that's the limit for FRSky. But, I don't think it's definitive for the RFD900x radio yet....if you only…"
May 11
fred flintstone replied to Seppo's discussion RFD900, RFD900+ - New long range radio modem
"well that's bit sad if its only 8 my diy uhf module has 16 with mavlink"
May 11
Michael Nunan replied to Seppo's discussion RFD900, RFD900+ - New long range radio modem
"I have been using the PPM over RFD900x for a while. I think that there are 8 channels passed through the RFD900x - I have not tried to put more through. Here is a view of the signal coming out of the UAV end of the…"
May 11
Roger Ronald replied to Seppo's discussion RFD900, RFD900+ - New long range radio modem
"I've googled for hours, but I still can't find an answer..... How many PPM channels are support by the RFD900x?  8 or 12 (or something else?)"
May 7
Roger Ronald replied to Seppo's discussion RFD900, RFD900+ - New long range radio modem
"THere is a parameter to keep the plane from speaking for a delay period. Set the TELEM_DELAY parm to the number of seconds you desire. You’ll see “no input data” for that length of time, but it then starts up. I had problems with…"
May 7
John replied to Seppo's discussion RFD900, RFD900+ - New long range radio modem
"HI Guys,  Maybe my question has answer within the 60 pages, but I was not able to read them all. I hope you will be able to help me.I would like to know if we need to fly 60km using the RFD900x, will it be possible? it is a fixed wings planeWe…"
May 7
Thomas Stanley-Jones replied to Seppo's discussion RFD900, RFD900+ - New long range radio modem
"Isn't it always after you ask the question that the answer presents itself. We've figured out that the radio can't handle a constant stream of data when it boots up. If we wait to plug in the data wire until moments after booting up,…"
Apr 10
Thomas Stanley-Jones replied to Seppo's discussion RFD900, RFD900+ - New long range radio modem
"Alright, I'm back. I've decided to use two RFD radio sets. Radio 1 is on the UAV and communicates with Radio 2. Radio 2 is in the Relay box mounted on a mast some distance from the Pilot. It is connected to Radio 3 using the Tx/Rx wires…"
Apr 10
Dan Ho replied to Seppo's discussion RFD900, RFD900+ - New long range radio modem
"If you were really going to go the home-made USB cable route, CAT-5e would be a good choice.  Here's some rated to -40C. Not sure about price but probably fairly…"
Jan 15
Dan Ho replied to Seppo's discussion RFD900, RFD900+ - New long range radio modem
"Well, USB needs one twisted pair for each direction.  If you can't find an off-the-shelf outdoor type, maybe you could buy the indoor type and just use the electronics by replacing the cable with two silicone twisted pairs.  I do see…"
Jan 15
Vinh PHAM GIA replied to Seppo's discussion RFD900, RFD900+ - New long range radio modem
"Thomas, I think you may want to look at a TTL-RS485 converter. RS-485 is good industrial standard for long range wired communications, longer range and better immunity to noise than USB at long range. Silicone is not very good neither at very cold…"
Jan 15
Thomas Stanley-Jones replied to Seppo's discussion RFD900, RFD900+ - New long range radio modem
"Thanks for the suggestions.  I think I'll try to find someone who can make an active USB extension out of silicone wire or something so it's not going to break in sub zero temperatures.  I suppose this should also have some kind…"
Jan 15

Profile Information

About Me:
Engineer, Pilot, General Geek and interested in anything electronics, flying and any random cool thing of the moment
Please tell us a bit about your UAV interest
Variable pitch quadcopters, UAVs for the outback challenge
Hometown:
Brisbane

Comment Wall (1 comment)

At 12:44am on December 29, 2013, mParets said…

Hi. I'm struggling in an attempt to get a pair of RDF900 modems talking to each other. When installed on a Raspberry Pi via USB and seems to work find (responds to +++ to enter AT command mode). When installed on my Windows 8 laptop I get nothing. The status light flashes, I get a red flash when I transmit a key press (testing with Pythons Miniterm). I even down graded Usb driver to the .28 version as suggestion in forum post. No luck on any front get a response on the pc, and no suggestion that the two modems are connecting.

Is there a fix for any known issues with Windows 8?

Is there is tutorial/primmer/testing document? Something that I could follow to make sure I am setting everything up right?

Any suggestions would help.

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