Particle Boron Flashing Red on startup

Hardware
1

I just downloaded a code update to a Boron. The change was to add

SYSTEM_THREAD(ENABLED);

to setup()

As soon as the code was flashed, the Boron rebooted, went into its normal startup cycle (slow green, fast flash, then flashes Red and reboots. Looks like about 8-10 reds, pause, 1 red.

I tried Device Doctor, no help.

How can I restore this device?

Thanks,

2

What does your setup() code look like?

Your code may be trying to do something that requires an active cloud connection, which will not be immediately available with SYSTEM_THREAD(ENABLED)

3

I did something stupid. I put

SYSTEM_THREAD(ENABLED);

inside setup() instead of before it.

I had to locally re-flash "tinker" to get the Boron back, then was able to re-flash my code with the above line in the correct place.

Thanks.