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This thread is privately moderated by Jack Crossfire, who may elect to delete unwanted replies.
Dec 13, 2007, 01:46 PM
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The XBee latency train


Optimization round 3 got 2620bits/sec uploads to copter thanks to compression. Firmware replacement only takes 3 minutes. AHRS readings came in at 4Hz thanks to 5 responses being sent for every request. File downloads from copter only reached 2200 bits/sec using the same trick + compression.

The horrible downloading performance only makes sense in terms of our horribly inefficient Java algorithm, but this story has been beaten as far as possible. It's so cold, we don't predict much file transferring in the field.

The main problem is still a 1/4 second delay sending flight controls. Sometimes it hits exactly when the control is sent and sometimes it delays.

Wholesale inflation hit 38% annual rate in November, a new world record. Guess the 20% rise in LiPo prices wasn't just maxamps.
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