i have a competition in our college.the mission i should complete in the competition is to go to a place whch is 1km far away from the launch point and provide the live video feedbackto the ground station whether it can be either autonous or manual but personally i prefer autonomous.iam facing few problems in my progress.im presently using APM2.5 and the model i prefer is quadrotor with which im familiar with
1)i need object avoidaance feature in my quad so that my quad doesnt hit any walls or something like that.by using four sonars or ir sensors on the 4 sides of my quad i can attain this feature on my quad but i donno whether this feature is included in the code provided in the site.if not is there any custom code written by the forum members?
if so please provide the link............
2)how to set the auto trim feature on ch 7?????????
3)if my rc set frequency is 2.4ghz,fpv frequecy is 900mhz, on which frequency can i use telemetry set to maintain link between my apm and mission planner??????????
please help me in the above three aspects
thanks in advance
I can only answer question 3, you can use the 433mhz version of the 3DR radio modems. Personally though I use 900mhz for data and 1.3 ghz for video.
thankyou for the quick reply :)@hamish cook
can 433mhz penetrate into wooden walls and maintain link to a range of 1km???????
do u have any personal experience?
please help me. my time is runningout!
I have managed to get a range of 1,5 km on full transmitter power (1W) and a wooden wall blocking the line of sight from the 3DR 433mhz radio. The aircraft was at 400 meters height so I would say that I was stretching the limit. I was using standard antennas.
I have a question, the 3DR 433 MHz radios have a maximum power of 20 dBm or 100 mW. Which amplifier you used to get 1 Watt?
thanks for your valuable suggestion sir @ Thomas Larsen.
sir i would like to know how did u manage to get 1W transmitter power?
Once again thankyou sir!
i would like to know the opinion of the forum members about the first point which i mentioned!
Sorry, my mistake. I mean 100mW not 1W. I have no amplifier connected. The range on the 3DR radio is excellent with reasonable bit rates.
I think my radio was set to 56Kbps in this particular case
thankyou very much sir@ Thomas Larsen
sir how about the obstacle avoidance feature?
please helpme sir!
my time is running out!
Thomas, are you using the new firmware for 3DR?
my 3DR firmware version is 1.6. and i cant get long range :(
The case mentioned above was with the 1.5 3DR firmware. I am going to test the 1.6 firmware once I get my new drone up and running.
you are much better off getting a high gain Rx antenna then banging the Tx power. You will get radiated emissions that could possibly swamp the other gear on your quad.