We have a bunch of photons here. With initial configuration they connect successfully, only to drop the connection moments later. After than they can’t get online anymore, keep blinking green. We have a Juniper wifi controller with 4 identically named access points, all both 2.4Ghz and 5Ghz, b/g/n. …

I think it connects to the one with the strongest signal if all are of identical SSID and security type :wink:

Nearly! :wink: It connects to them in the order they were added.

Hi @taco , Is your wifi controller trying to ‘force’ the photons to another access point, or is it rejecting devices that connect at certain connection speeds? Is there a way get more insight into what the Juniper controller might be doing? Thanks! David

Have you confirmed that they actually get connected to the cloud (breathing cyan) even for a second or two? If they can’t connect to the cloud, it could be a firewall issue with TCP port 5683 (CoAP). That’s my initial two cents. The multiple identical network thing is just showing you what your w…

Yup, they connect for 2-10 seconds and the imp dashboard shows them as online.

@mdma “in the order they were added” — wait, so it knows about the BSSID in addition to the SSID? @Dave I don’t think it forces clients to APs and it’s pretty forgiving/broad on speeds and channels. I’ll do some more digging!

Just to elaborate on the dual-band problem: Many dual-band 2.4 and 5 GHz routers try really hard to move traffic to the faster 5 GHz band (Apple routers seem to be a particular problem) so the symptom is usually that your devices can connect for some time and them suddenly they are disconnected and…

[image] taco: @mdma "in the order they were added" Not following you here. Simply the order the WiFi networks were added to the device. So If you add Network A then network B it will try them in that order. (Oh, one small detail, it's in fact the reverse order they were added, so the network…

Quick update—we fiddled with the Juniper settings, the good news is that now the photon is online. The bad news is that I haven’t been able to reproduce what setting might have done it :expressionless:

@bko ; I realize this is an old thread but it seems I have been battling this issue for awhile. My situation is exactly as described; several photons connecting to an Apple router which has both 2.4 and 5GHz enabled. Photons work well but poop out after hours or days, sometimes weeks but eventually W…

[SOLVED but hopefully not the last word] Photons lose connection to wifi—any ideas?

Troubleshooting

peekay123 September 5, 2018, 2:05pm 22

@AlexSneedMiller, Particle recommends NOT having the same SSID for both bands.

On new wifi network, Photon briefly connects then turns solid cyan (unreachable)

Particle Photons randomly disconnected from network and won't reconnect

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[SOLVED but hopefully not the last word] Photons lose connection to wifi—any ideas?

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