Replies to This Discussion

DeveloperPermalink Reply by Andreas M. Antonopoulos on May 31, 2012 at 10:46am

You've made good progress!

The weird characters are MAVlink packets (ASCII "U"  = 0x55, which is the "STX, start transmit" header of the MAVlink packet. )

So you're seeing MAVLink.

The sim-multicopter part is working correctly too. You should indeed see the response that sets the GPS home position (cmd#: 0 id:16 op:0 p1:0 p2:0 p3:-35.3629379 p4:149.1650848)

 

I think you have the command line for mavproxy incorrect. Instead of "--master tcp...." you need "--master=tcp:...."

Otherwise it ignores the tcp part and tries to connect to a serial TTY, then you see nothing happening ;-)

 

 

Once you fix that you can try these commands on mavproxy:

 

rc 4 2000  (set full right rudder). You should see "MOTORS ARMING" or something

rc 4 1500 (center rudder), you don't want to take off with full right rudder

rc 3 1400 (40% throttle), take off

 

After a second you should see:

 

height 10

height 20

height 30

 

etc. 

 

 

 

 

• ▶ Reply

Permalink Reply by Young Lee on May 31, 2012 at 2:04pm

Thanks for your reply, Andreas.

I added '=' between the option keys and values and typed in those commands at the prompt of Terminal 4 (MAV>). Still nothing is happening. Do I have to run a ground station to process the mavlink packets coming out of the second terminal?

I see the following lines in the second terminal:

gyro did not converge: diff=0.121114 dps

MOTORSARMING MOTORSLow Battery!

Do you think these are critical?

• ▶ Reply

Permalink Reply by Young Lee on June 1, 2012 at 2:04pm

I figured out why nothing happens on Terminal 4. mavproxy.py stuck at master.wait_heartbeat() in the main_loop function. In addition, I had to add --mav10 when I run mavproxy.py. Now, I see the quadcopter flies in FlightGear as I type in the three rc commands. Thank you for the tip.

I still have a little problem with FlightGear though. On the FlightGear window, I see some texts like altitude, roll, pitch, and heading, etc., but they are all 'nil' instead of some numbers.

Any comments would be appreciated.

• ▶ Reply