2 red lights after flashing Crazyflie

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mistermzx
Beginner
Posts: 5
Joined: Thu Aug 23, 2018 2:19 pm

2 red lights after flashing Crazyflie

Post by mistermzx »

As part of a research project at the Technical University Berlin, I am currently implementing some nonlinear state estimation algorithms on the Crazyflie 2.0.

Sometimes, after flashing the Crazyflie over radio, the Crazyflie does not restart properly and shows two red lights (no blinking) instead. What does that mean?
arnaud
Bitcraze
Posts: 2538
Joined: Tue Feb 06, 2007 12:36 pm

Re: 2 red lights after flashing Crazyflie

Post by arnaud »

This is a 'Hard fault' condition, this is most likely caused by an error while flashing. The only solution currently is to flash again.

This is something that we have not seen for years and that has appeared quite recently, we do not know what is happening yet but we plan to look at it. The first things we should do is to add a check of the firmware in the bootloader so that the bootloader can re-flash pages that are in error automatically. I have created a ticket about this.
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