Hi to all ( Gia, in Greek)
I do not know if the Topic is correct but, too many users in Europe are trying to use the modem xbees Pro 2.4GHz without always succeed, but when they have, the range is dramatically small compared to the xbee modem at 900MHz. ( My modem , LOS is 800 meters only).The xbee modem @ 868MHz is not operating properly due to duty cycle problem.
I would like to make a simple suggestion, although I do not know if it has been suggested previously :
The "marriage" of Ardupilot Mega with 433 MHz modem used in FY3ZT autopilot.
I do not have the necessary knowledge to do it, but I think there are too many users in Europe, who have the knowledge and perhaps to try.
(PS .: Sorry for my english , the translation is from google/translate)
Geia sou Nikola,
FY marriage "sounds" good for long range, but low baud rate could cause more problems than benefits (19200-max38400 vs xbee900pro 56k). Iam using the standard combination of 900pro prsma for ground and pigy tail for air, with 2km air distance and rock solid transmition (98%). Offcource its not legal in eu, but 50mw i think that doesnt hurt anyone. Also its cheaper..
magic happens when you properly ground the ground xbee (near your car) and secure with no vibrations the air side. soon i will try more db duck antennas for both sides and post results
send me pm if you want to meet sometime and do some drone flights in greece together.
We (3D Robotics/DIY Drones store) will soon be coming out with a cheaper Xbee alternative that should solve the problem for Europeans who can't use 900.