I have upgraded firmware to the 0.4.3 version, tried all troubleshooting procedures, but nothing has helped. Apparantly, one of my two Phtons is a draff, so just 50% production success.
I have what seems to be the same problem but with what has been a working photon. (I was experimenting with UDP buffer size and may have overwritten something - or that might have been a coincidence and nothing to do with the problem.)
Anyway when I reset the photon I get a flashing green followed by fast cyan/very fast red. (Nothing like the red SOS)
Safe mode didnāt get me out of the problem so I tried a factory reset and ran the Particle Android app. I got stuck at the "Setep process couldnāt disconnect ā¦"
I have used dfu-util to reload the firmware (v0.4.4)
I followed the instructions to obtain the photon ID and ran keys doctor and keys send
Still flashing cyan/red and still reporting āSetup process couldnāt disconnect ā¦ā
Can you also try flashing the server public key. Photon setup flashing cyan with a "quick red burst" (now orange burst) [Solved]
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Thanks - Iāve done that. The keys problem is fixed with the new public key.
Looking at the flashing cyan/red thread also points to the likely cause - a power brown out.
The Android app then told me the photon was owned by another user but let me change the owner.
Configure Wi-Fi and Connecting to Wi-Fi happened quickly but it hung on waiting for device connection (with flashing blue and the D7 led on)
Rebooting the router fixed that and Iām now connected successfully again. Thank you @mdma and @bdub (for the keysstuff )
I was quite surprised to find that the photon has retained the name it had before all the trouble arose and despite the apparent change of owner. I guess that the association of name to device ID is at the Particle server end of things.