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Sonoff switch becomes offline

Guys, today I start facing an issue when the Sonoff switch goes offline mainly when I am outside home. The internet connection is perfect, the switch is still connected to the router (Extreme Time capsule ) , but it shows offline. When coming home on wifi network - it goes online. I restarted it several time. After the restart it is visible online remotely, but after an hour again goes offline. What could be the issue ?

8 people have this problem

 Hi all, I am having the same issue. I had the switch connected to a lounge room light, connected with the online android app, all was working fine, timers on and off also worked. Then after around 1 hour the switch was suddenly reported offline and the light was off, no indicator light either. I tried the manual button, but this appears to do nothing.

Finally I removed power from the switch and when I reconnected the power and the indicator light started flashing again and went through the cycle of reconnecting, the app on the phone still said the light was on, so to turn it back on I had to turn it off on the app and then turn it on again on the app.

The model is listed on the app as sonoff pro and the firmwarer version is 1.2.0 and it has "latest" on the far right of the screen next to the firmware version.

my switches goes very often offline, i have seen that they all connnect to china amazon server and
sometimes the network latency ist over 2000ms and then they lost connection. before some month there was a server in germany frankfurt they connect and all was ok. itead are write some month ago that they had amazon servers in europa , america and so on. please change the firmware to better servers.
I hab the latest firmware. the firmware uses ssl port 443 but the th10 use port 8081 (its older firmware but i get no information about new firmware.)


WIFI connection lost - After one day working well the WIFI has lost. This issue is repeating daily. Can you help?

Since the initial issue, I have had one instance again, it seems to be much more stable here now, so it does appear to be an issue with the connection to the servers from what I can see from my observations.

Will need to see if I can bring it in-house or at least to my local telehoused server... but that will be a job for later.

But other than the couple of hick up, a brilliant device that appears to work flawlessly.


I have the same problem. All of my Sonoff devices go offline every week (mostly after three-four days continuous operation). The problem is solved by turning off the power (with following reduction of the power).
I think ITEAD must implement Watch Dog Timer in the next firmware...


I am planning on buying a sonoff wifi switch, was just wondering with the timer programing does it remain if the power goes off and come on again or does it reset, also can it be used in 220v and 12V.

Please refer to following methods if you device never online:

0.Our device just can be used with 2.4G network. Device need time to be online when pairing successfully.

1.Please refer to following link:


2.Not connect to wifi:

 1)Please check the SSID and password, make sure they are entered correctly?

 2)try to power off the device and router for some minutes ,and power them again.

 3)Try to Make a smart phone as hotspot connect to Internet,use another smart phone connect device to this hotspot.

4)Your wifi name and password should be in English letters and numbers. No special letters allowed,and have better the length don’t beyond 20.

 5)Please try to make your router haven’t password to connect device.

 6)Change SSID channel to unique.

 7)Disable router MAC filtering

8)Try to Change the router wireless setting from mixed mode 802.11g/802.11n to 802.11n only.

 9)Or Try to Change wifi 2.4GHz network to WPA TKIP mode or no security mode.



3.Not connect to router:

 1)Try to ping our EU), US).




For device ever online,please refer to following methods:

1.Please make device close to router

2.Disable the MAC filtering.

3.Try other router.

4.Please Unplug the device for several minutes, then plug it to power up again.

5.Try pairing again.

6.Try to change the router name to pairing again_ can it work?

If still not work,please contact with for this problem.

Hivteam, i bought recently 2 gand switches, one is working fine another one goes off line after hour. I got it replaced and connected again, same problem worked fine for 4 hours, now disconnects every 20 mins. After restart works for another 20 mins. Also I was not able to pair this device again using quick method. After I clicked button waited for two short beeps, then kept lressing got another beep, I managed to connect to it as AP and add manually.. but still disconnects... I jave 4 or 5 old type swifches with out RF and they work perfectly fine. The new type with RF work only on WPA and I had to buy another router to get them work (don’t work on Huawai)
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