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)
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.
What frequency? And how soon?
I am trying to get my hands on a wireless solution in the next 2 weeks, but the 900MHz XBees are almost impossible to source right now. I'm heading down to Antarctica in 3 weeks and will bringing the 3DR Arducopter with me to provide some entertainment and unique aerial photography/video. It would be fantastic to have the wireless command/telemetry capability so I can fully explore the Arducopter's capabilities.
Pat, we haven't announced details and they won't be available in time for your trip, I'm afraid.
Sparkfun does have 900Mhz wire antenna modules available now, however.
Please take pictures of the Arducopter in Antarctica!
Chris, thanks for the quick response. In your experience, is there a significantly good reason to use the RPSMA version instead of the wire antenna version? Or to phrase it differently, if I have a choice of not having telemetry at all or having it with 2 wire antenna XBees, which would you choose. I'm assuming that the wire antenna has less gain and range, but if I'm flying in close proximity with the Arducopter, then perhaps the additional range wouldn't matter so much in the short term. Plus, I could always upgrade to the RPSMA in a few months when I get back to the States.
I will definitely post some blog messages about my experience with the Arducopter in Antarctica. It just seems like too cool of an opportunity to pass it up. 100 years ago, it was a technical achievement for the premiere explorers to bring tractors and film equipment to the last continent, and now I can bring my very own autonomous aerial vehicle with high definition video to help document my experiences. It is nothing short of amazing!
I'd go with two wire-antenna ones. They should be fine for copter range.
I've been to McMurdo, but never South Pole. Which station are you going to?
Wonderful, will proceed withe the wire-antenna varieties.
Yup, I'm going to McMurdo, but we will be venturing out to 5 locations within a 200 km range to deploy in-situ ground ozone instruments. I can't wait!
Thank you Chris
But i think is usefull to think a product solution with rpsma antennas , or It would be useful to have the infrastructure to upgrade with RPSMA antennas , for airplane use
Nikos: of course our own products will come with a rpsma connector. I was just referring to the Xbees available at Sparkfun now in my response to Pat.
Thank you Chris :-)
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.