Yesterday I had the opportunity to test the 3DR Radio 900MHz.
On first impression I could see that he is much smaller and lighter than the Xbee.
I upgraded the firmware to v1.5 (the card that goes in the model airplane need a FTDI cable).
I made some ground tests with the default setting and noticed some delay by MissionPlanner. So I have disabled the option ECC and everything worked perfectly.
In flight test, I used a 7dBi patch antenna at the ground and flew up to 8km ( 4.8miles ) away and 2000m high and the 3DR Radio signal was in 90-94%.
Compared to the XBee system with the same patch antenna at that distance the signal was around 40-60%.
The settings I used were the image below. The only difference is the firmware v1.5.
I'm very happy with the 3DR Radio.
Thanks for correcting me. I must have misread or misunderstood something somewhere.
Are there any plans for over-the-air firmware update? That would be really slick for debugging.
Can you tell what 7dBi patch antenna you are using. That range is fantastic!