Field testing results

Today i tested the system in the field with the new groundstation and FTU. I reached 150 meters with a reasonable video feed. This made me confident and want to jump ahead at setting up an aerial test. I tested using my RC gear right next to the streaming equipment. The transmitter induced a 10 - 20 second delay in the video feed. The RC connection did not seem to be influenced by the streaming equipment.

Te most interesting is that the RC equipment induced a delay, but image quality remained consistent. Increasing the distance of the video feed produced a more intermitted image, but almost no extra delay.

The influence of the RC equipment on the FPV equipment was expected and should be solved in one of the following ways:

- Switch the FPV system to 5Ghz WiFi
- Switch to UHF/LRS RC control
- Control the plane over WiFi

The last one is the most risky but the cheapest
I will investigate the performance of the orangeRx openLRS system and buy it if it is good enough.

Bye!

Discussions

jeanleflambeur wrote 11/28/2014 at 23:27

Are you using TCP for the video feed? The 20 second lag is most probably due to massive packet loss which causes lots of retransmits and video frames start to accumulate in the send buffer until the buffer is full.

Are you sure? yes | no

richardginus wrote 11/30/2014 at 11:13

UDP all the way! I think the lag occurs in the data link layer. WiFi has got its own re transmission techniques so i could fiddle with those settings. I plan to solve the problem at the root by removing the interference and use the WiFi protocol tweaking to get more range.

Are you sure? yes | no

richardginus wrote 11/25/2014 at 15:08

I use an old Senao long range wireless bridge with up to 23dBm(200mW) RF Output Power on the ground and a usb wifi adapter with diversity (https://www.conrad.nl/nl/conrad-wifi-adapter-300-mbits-986241.html?ref=list)

This is not ideal nor final.

Are you sure? yes | no

bimbam wrote 11/23/2014 at 19:47

What WiFi systems (On the quadcopter and on the ground) are you using right now?

Are you sure? yes | no

New groundstation and field testing unit.

Cash strapped developments

Discussions

Become a Hackaday.io Member