Long Term Photon Connection Stability


I was using Automatic mode. I would just leave the device plugged in 24/7 and only send an update every few mins. That’s all.


We have about 120 photons running in 120 different gas stations in various states. Most of them have been deployed for about 2 years now. I would guess that about 100 of them have NEVER been touched and have gone through about 10 OTA firmware updates, power outages, internet service outages etc. and always have recovered. A few have been replaced due to OTA firmware update failures (about 4). There are about 15 devices that occasionally need to be reset (like once every 3 months). There are currently two locations where we are having to reboot the wifi router about every 3 days. Our stats would suggest this is some sort of environmental issue. These two locations that are having issues use have the same wifi routers as 60 of the other locations. The 60 locations have a standardized networking stack. The other locations we deal with many different routers and networking stacks which seem to be no problem.

An odd thing is that all of our connectivity issues have always been in New Mexico, and Nevada. I’m not sure if generally they have bad service down there which trickles down to re-connectivity issues to the wifi router? The devices in Idaho, Wyoming, Utah, Montana, just never go down.

I know thats a lot of different numbers there but the gist of it is we are pretty successful and happy with the photons. Honestly we haven’t done a major update to the app for a long long time and we are very rarely in the code. We use semi-automatic mode and declare the use of an external antenna. I’m sure there are other good experiences out there.

// This #include statement was automatically added by the Spark IDE.
#include "HttpClient.h"

// This #include statement was automatically added by the Spark IDE.
#include "application.h"



// we will handle wifi manually

Thanks particle team!



@chipmonk, I think it’s possible that we may have seen this before. I do think there was one time (out of 120 devices over 2 years) where I had to have the customer re-enter the wifi credentials. The customer swore that credentials never changed but who knows?

Did you ever find the cause of that? Did you experience it again?


Hi jasonp,

Never did have a photon lose it wifi setup again. Never was able to figure out the root cause.



I didn’t find this thread until recently, but I too am now having the blinking cyan problem. Below, you will find my original post from about a week ago:

I have a Photon that is several years old. I recently deployed it on a newer wifi network where it seems to run flawlessly for several hours…before it loses wifi connectivity and begins blinking cyan. Hitting the reset button always seems to correct the issue - it blinks green and then re-connects to the wifi and breathes cyan. Several hours later - the problem reoccurs.

I have searched the forums but wasn’t able to locate a post that dealt with the specific problem I was having (there were several posts that discussed DFU mode, and occasional red bursts, but that’s not what I am seeing).

The problem unit has firmware 0.8.0 rc10. I have other photons working great with firmware 0.7.0 rc2.

Any thoughts? Thanks."


You already have a long discussion in that other thread, reposting the original without the link would mean same replies may be made resulting in little new information but “waste” of time for respondents

So if you want to refere to another thread always add a link.


You are right - sorry about that and thanks for including the link.

UPDATE (October 19, 2018)
After running several test scenario’s I have come to the conclusion that the issue I was having was related to the system firmware that I had installed on my photons. I was using 0.8.0-RC.10 and the units would invariably go into the “flashing cyan” mode after several hours; it would only reconnect to the cloud after I reset my photon.

Earlier this week I “downgraded” the firmware to version 0.7.0 and my photons have been working fine ever since. It’s been 5 days and counting. My photons do lose connection from time to time, but they always recover on their own.