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.php
Some of the key features of the RFD900 are as follows:
- Multi point and point to point link capability.
- Long range >40km depending on antennas and GCS setup.
- 2 x RP-SMA RF connectors, diversity switched.
- 1 Watt (+30dBm) transmit power.
- Transmit low pass filter.
- > 20dB Low noise amplifier.
- RX SAW filter.
- Passive front end band pass filter.
- Open source firmware / tools, field upgradeable, easy to configure.
- Small (30 x 57 x 13 mm), light weight (14.5g).
- Compatible with 3DR / Hope-RF radio modules.
- License free use in Australia, Canada, USA, NZ.
These modems are designed to support long range applications, while being easy to use and affordable.
These modems have been flying in various platforms and have demonstrated excellent performance in real applications.
RFD900 modems are now available at: http://store.rfdesign.com.au
Support within APM planner and the radio configurator from Michael Oborne is already available.
It works seamlessly with APM planner, all radio Mavlink parameters are available.
Update, December 2014: The RFD900+ with improved specifications is available now at:
http://store.rfdesign.com.au/rfd-900p-modem/
Seppo Saario
rfdesign.com.au
Replies
I would say: Don't do that!
Most likely you either shortcircuit something on board or mess it's RF design and tuning. RFDs have specially designed RF PCBs and adding more material on it would most likely kill it's original design as epoxy/silicone will definitely alter resistances etc on board and components.
Why don't you just add small solder dots on the metal EMI shield. That would not cause any bigger harm..
Hi !
I have a new problem. I bought a rfd900+ telemetry for a plane. My ground station has a rfd900 (old version). The first times everything was working very well. But now there are serious problems. I did several test... I took from a friend the non-original 3dr telemetry (915 mhz) and I use it on my computer.
My test results:
Plane: Rfd900+ Computer: Rfd900 (old version) Weak rssi
Plane: Rfd900+ Computer: 3dr Weak rssi
Plane: Rfd900(old) Computer:3dr Good rssi
All antennas works well (I test it) I understand my Rfd900+ telemetry has a problem. I install to rfd900+ a new firmware (1.9sik rfd900a) and I check all settings but the signal qualty problem not fix.
What do you think about this problem. Is it hardware problem or software problem ?
Enes,
I don't know if it relates to your problem, but I found that my RFD900+ radios will not work with either my RFD900 or my 3DR radios unless I turn off ECC. With ECC disabled, they all work together just fine.
-Don
Enes,
How weak is your RSSI? I have noticed that at close range the signal is weaker but then as the distance increases it gets better. I don't know what power output your using but that has been my experience. I actually cannot connect to mission planner unless my vehicle is a good way away from me or if in my house its a few rooms away with the doors closed. I have also read about the ECC problem with using a 3DR radio and a RFD. Just what I've seen.
Regards,
David R. Boulanger
I have a problem with the telemetry logging of the RFD868+ on Pixhawk.
If I look at the logs from a 3DR radio it looks like this:
Do anyone know what the problem might be?
Edit: The communication was working fine on both flights
I have now verified that if I use the RSSI debugging functionality with AT commands the data looks good, RSSI is around 250 and noise around 60. So it is something in the pixhawk logging.
I'm having a problem sometimes with the link quality being bad at boot up, even with both modems very close together (around 1 meter)
This also makes the "Getting Params" process slow. Is this process necessary or can I skip it?
Thanks
I am interested in a one-to-many application. (one ground control, many rovers)
Does this modem support one-to-many application?
Thanks
Hi.
I just wanted to say thank you for the fast shipping and the great product. It worked right out of the box and link quality is the best I have seen.
I was wondering how the RCLink project has developed? Is someone using the RFD900 to also manually control the aircraft? I would like to have a manual override possibility in case something goes wrong (GPS Failure, Airspeed sensor, etc.)
Again thanks for the great product and the community support
Jose,
I'm using a joystick, mission planner, and a RFD 900 for control over a boat. Works great as long as your computer is not scheduled to install updates while you are using it. Had a problem with that once.
Regards,
David R. Boulanger
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