Photon cannot connect - rapid blinking cyan [SOLVED]

Troubleshooting
1

After running my pulse counting sketch for a few days. My particle started blinking blue rapidly.

I tried resetting it but it kept blinking blue. Then I realized that FW 4.4.0 is out so I flashed (via DFU) it in. Now I can’t get my Particle back on a WiFi network (tried two different) from both the cli and the Android app and my Particle just keep blinking blue.

Directly after powering it is blinking rapid red once in a while. But the problem is that I can’t get it to stick with WiFi settings.

Serial connection works fine.

Any suggestions?

https://drive.google.com/file/d/0B5gGT42Znym_RG5Pbl9ibHZDNVk/preview

2

The usual first suggestion for the Photon would be to try “Safe Mode”.

But looking at your vid, this might be useful too
Rapid cyan followed by rapid red flashing [After switching back from Local Cloud][Solved]

3

I can’t get it to stay in safe mode. While following the guide after releasing SETUP my Photon directly goes to SOLID WHITE (~5s) -> BLINKING GREEN (~3s) -> the same as the video above.

I did try to do fix the keys, but I’m afraid I also ran particle keys server. Can that be the problem (that my Photon is trying to connect to a non existing cloud)?

Edit: Followed the instructions here Tutorial: Local Cloud 1st Time instructions [01 Oct 15] to download the cloud_public.der file and updated my Particle with:

particle keys server cloud_public.der

And now it is working again. Somehow it lost the cloud key.

2 Likes
4

Darn, there are so many topics with similar titles, I actually wanted to refer you to this one
Photon setup flashing cyan with a "quick red burst" (now orange burst) [Solved]

But anyway, glad you got it working :+1:

5

I’m not sure what I did to make it this way, it just started misbehaving one day…

I actually tried to read the doc and forum but could not find anything regarding server keys. (Didn’t know what I was looking for). Perhaps the server-key issue should be mentioned in https://docs.particle.io/guide/getting-started/modes/photon/#troubleshooting-modes. By trial and error I think the green mode actually “trying to connect to WiFi” and not “can not reach cloud”.

6

It’s hard to tell on your video, but for me the color looked cyan (green + blue sub LEDs together) in it.

I’ve no idea how this could have come about, but maybe @mdma has got an idea (and could trigger a doc update ;-))

7

Yes, my Photon is probably cyan alternating to red in the video (as referred to in the docs).

But if I shut down my router my Photon will blink green when booting up, not “breathe blue” as refered to here: https://docs.particle.io/guide/getting-started/modes/photon/#wi-fi-module-not-connected