BLE-to-SB quadcopter bridge

RE: BLE-to-SB quadcopter bridge

Daniel Veilleux — Tue, 09 Feb 2016 00:36:48 GMT

Hello Hung,

I found this teardown after the quadcopter caught my eye.

RE: BLE-to-SB quadcopter bridge

Daniel Veilleux — Tue, 09 Feb 2016 00:33:23 GMT

Hello Luis,

The phone's accelerometer is read and sent every 30ms.
So much pin toggling. A good logic analyser is worth its weight in gold.
The BLE side of my project is based on the NUS as well. ShockBurst is better suited for talking to the quadcopter itself (but the phone can't use ShockBurst directly).
I think the quadcopter is easier to fly with my phone than it was with the original transmitter.

RE: BLE-to-SB quadcopter bridge

Stanislav Silnitskiy — Sat, 06 Feb 2016 00:36:33 GMT

Very helpful, Daniel!

RE: BLE-to-SB quadcopter bridge

Hung Bui — Thu, 04 Feb 2016 15:42:10 GMT

Nice post Daniel ! how did you find out that it was a L01 and Shockburst ?

RE: BLE-to-SB quadcopter bridge

Marcio Montenegro — Thu, 04 Feb 2016 10:59:33 GMT

Thanks for sharing Daniel.

RE: BLE-to-SB quadcopter bridge

Luis — Thu, 04 Feb 2016 08:45:04 GMT

Very interesting info, thanks for sharing. I am working on a very similar project, building my own little helicopter using nRF51. Some questions arised me after reading it:

At which frequency did you call writeCharacteristic in order to improve latency? I am using rigth now 20Hz.
I know your setup is different and it may have more delay due to the transmissor in between drone and phone, but how did you measure latency of control signals? I was thinking about sending a mesage from drone to phone, and then an answer from phone to drone, counting time elapsed, but haven't tried it yet.
I actually use normal NUS service, is shockburst better suited for this application or not much difference?
Did you get the quadcopter to fly as good as with the original transmitter?

Thanks a lot for your time, Luis Rodenas