Hello, I’ve a photon powered from a battery. Is is connected over wifi but not on Cloud, so it blinked green. Sketch ran for some days. But now after a battery discharge, I found photon blinking blue. I reset it and it did not changed anything, it blinks blue! How is it possible? So I reconnect it…

@lah , there are other topics on losing eeprom/flash content when power to a Photon nears the SMPS drop-out voltage threshold. This has been flagged to the Particle Team but with all hands on the Electron release, things are a bit slow on the Photon side. As for the flashing cyan with quick red bur…

This is related to this: [image] Photon + Solar Panel + SF Battery Shield - Does not wake [Solved-Untested] Troubleshooting Hi all… My setup consist of a 2000 mah battery, a sparkfun power shield and a photon mounted on a weather shield from sparkfun too. Everything wor…

@peekay123 @frlobo I will apply given solution post Photon setup flashing cyan with a “quick red burst” (now orange burst) [Solved] … it’s not convenient at all when photon has been cased in a difficult to access place… If you have more explanations about brown out / flash-eeprom erase I’m very in…

[image] lah: @peekay123 @frlobo I will apply given solution post Photon setup flashing cyan with a "quick red burst" (now orange burst) [Solved] - #35 by Ashton ... it's not convenient at all when photon has been cased in a difficult to access place...If you have more explanations about brown o…

Just to clarify: This is a behaviour that is definetly not intended and Particle is aware of this issue and investigating cause and solution for this To keep track of this there is an open GitHub issue, so it won’t get lost, but there is no ETA for a solution [image] Issue: Photon: Po…

Understood and thanks @ScruffR Can you think of a solution that can prevent under voltage operation of the battery (Protect the battery and the photon on low voltage)… like a low voltage cutoff. It needs to be efficient… And it needs to be auto revertible when the battery is sufficiently strong t…

OK, answered this question in the other thread [image] Photon setup flashing cyan with a "quick red burst" (now orange burst) [Solved] Troubleshooting This might be something for SparkFun to look into but maybe @BDub can also comment here (and more importantly in the GitHu…

Understood, but there are a lot of floating threads related to this. If I don’t get an official answer on any of them, then I will keep seeking for an answer. I need to deploy my solution soon and don’t have a clue on how to fix this issue. Sorry and I will be more diligent on this issues. But then …

We’ve seen the same problem, the EEPROM being written over with FFs at power down. A simple fix is to use something like an STM1061 Low Power Voltage Detector. Our sytem runs off many different power sources, many of which drop voltage slow enopugh for the Photon to go nuts and overwrite the EEPRO…

Have you tried @jvanier proposed solution to update the brownout voltage setting of the photon? See: Eeprom persistence issue post

Photon losts its credentials!

Troubleshooting

ScruffR November 19, 2015, 10:15am 8

OK, answered this question in the other thread

(This is the reason why double-posts are discouraged - links might work better in such cases)

Topic		Replies	Views
Blue flashing - followed by amber flashes and blue flash again Troubleshooting	24	2854	October 19, 2015
Can the photon/P1 lose Wifi credentials during a power outage? Troubleshooting	8	2074	January 27, 2016
Photon + Solar Panel + SF Battery Shield - Does not wake [Solved-Untested] Troubleshooting	1	2037	December 10, 2015
Photons flashing cyan rapidly with an intermittent red flash, previously claimed and connected Troubleshooting	22	4094	March 16, 2017
Booting with solid white, then immediately blue led flashing mode Troubleshooting	5	1740	December 10, 2015

Photon losts its credentials!

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