I would like to introduce you to a new radio modem that we developed for very long range datalinks!
Some of the key features of the RFD900 are as follows:
These modems are designed to support long range applications, while being easy to use and affordable. Target pricing is in the region of $90 per unit.
They are 100% compatible with 900MHz Hope-RF based radios (3DR) and similar.
These modems have been flying in various platforms and have demonstrated excellent performance in real applications.
RFD900 modems are expected to be available in a few weeks time, before the end of June in production quantities.
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.
That is correct in that a ground+tx+rx lines are required to the APM1 to make it work.
To run the RFD900 from an external supply, you can remove the jumper and connect GND from BEC to pin 2, and +5V from BEC to pin 4.
It will create a ground loop if you have only 1 BEC running the whole system, but in this case there is not much that you can do. It has not caused any problems so far configures this way to date.
The ideal configuration is to have a separate BEC running the RFD900 with GND and +5V coming from there. The signal+GND lines to the APM would remain unchanged.
Hope it helps!
I received the RFD900 modems and APM 2.5 months ago, and just recently noticed that the telemetry port is different. I plan on creating the connector myself, but after seeing the picture from the diydrones store, the red cable is at the middle for the radio side, and moved to the edge for the APM side. Aside from the red cable, is there any other cables that was moved?
I'm from Brazil. I have a RFD900 kit, that receives with many parts that imported. Modem is nice, small, light and rock solid building, congratulations!
But to my first run, need know about FTDI USB/connector, how I would connect it in GS modem?
Black/GND in connector with pin 1 in RFD900 modem?
Mine was jumper in 4 and 6 modem pin, for USB supply, right?
Yes, that is correct, PIN 1 of USB cable (black), goes to PIN 1 of RFD900. (square pad) under the jumper.
The jumper on pins 4 and 6 connects the USB power (pin 6), into the +5V (pin 4) input on the modem.
Yes. I'ts already beeping here!
I will, probably, need some help tomorrow...lol.
I make contact.
Maybe I'm first in Brazil with RFD900, do you know?
Marcelo, not the first, I'm from Brazil too. :) Its very easy to setup!
Obrigado por fazer contato. Enviei pedido de amizade.
Solved it. I used the old 4-pin telemetry cable and connected it to the same uart0 port at the side. The wiki may cause confusion though since they recommend the new 5-pin connector..
Hi! I'm just wondering, but is there some sort of warranty? One of the radios stopped functioning and smells toast.
We haven't done any changes to the wiring, and it was functioning well last week. We even had succesful range tests. But just this afternoon, when we connected the power supply, we noticed that mavlink stopped sending data. If no warranty, can someone guide us on what to do if there is still some sort of way to repair it. Thanks.
I am sorry to hear that your modem had a problem!? - Yes, there is a warranty - if you can send an email with your details I will get a replacement unit on the way. If you can mail back the failed unit for analysis we can see what had happened to it.
Great! Thanks. I'll send a PM right away. Maybe I'll also send it to the e-mail address used in transaction, just in case. :)
Any news on the RCLink?