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But is not a big problem, now i will try to change the PID using the phone

In arduino the BT cant' work in multiwii works.

But inverting the cables in arduino not in the FC it seems not work... MAH

WORKS !!!!!! The problem was only the tx and rx connected like : tx>tx and rx>rx but following the video i see clearly that the connections are inverted! It was something I took for granted !! THANK YOU VERY MUCH for help me! Maybe whith out your help I would not be able to see this problem...

I momentanly turn off the module because the green led is vey bright

the connections are correct

The connection between arduino and computer is ok...The sketch " hello word " works. but i dont'know why if send AT command there is no OK coming back. maybe I'm doing something wrong...please tell me!

YES it not shoot back "OK" when you type AT

What sketch i have to use ? In the video there was no sketch

I tried a lot to change the baud rate with Arduino but when i send AT command nothing appears I spend a lot of time travelling on the web but nothing seems to work! :( I tried to change baud rate by following this video and similar :

Hello I bought a bluetooth module: http://www.banggood.com/MWC-Multiwii-Bl ... 86049.html Connect it to my quadcopter Start the program " multiwii " on the android device, press connect ( the red light stop blinking) but no data arrives, can't see the pid etc... I think the baud rate is the...

Ok at the end i opted for turnigy nano-tech 5000Mah: http://www.hobbyking.com/hobbycity/store/uh_viewItem.asp?idProduct=17254

Sorry You're right about Watts/hour. Anyway i opted for two 4s battery connected in parallelo on this way i can get more flight time... probably 2x5000 Mah 20-30c In HK there are a lot of batteries, i've seen 3 principal brands: Turnigy nano-tech 5000mAh ZIPPY 5000mAh Compact Rhino 4900mAh...

Maybe in future :D Please take a look on my new Thread about battery "Link" Thanks a lot all of you !!! I love this new hobby :D

I am looking for a battery... watching on forums, hobbyking and using Ecalc... Some one say 11.1 v battery are better than 14.8 v ...I prefer 14.8 v My goal would be to transport my camera (300 g ) with a reasonable flight time 10-15 min using 80% rule. Here is my config: Frame...

Just measured... look the photo Okay maybe 14 inch props are a little bit oversized;) but a 12 inch prop fits very well. Or in future I can stretch the alu tubes.

Thanks for the reply, Okay will use a different props for sure with a 700 kv motor (11-12 inch) Starting with a cheaper props and after buy a more professional props. Another question... what would be good ? a 11x4.5 ? with 700 kv ?

Hello, This is my first build i spent a lot of time in search of the better parts for my quadcopter. My goal would be to transport my camera (300 g ) with a reasonable flight time (using lower KV motors). Here is my list: Transmitter and receiver : Turnigy 9X 9Ch Transmitter 30g approx (48€)...

HELLO to everybody! I'm happy to join this forum, I have diffent rc cars but now i would try build my first drone and hope here i can find someone that can help me.:D Here is my homemade 550 frame using alluminium tubes and fiberglass foil... At the moment i am studyng the best components...