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Cannot pair wifi smart switch

I just bought six Sonoff wifi switches but I can't get them to work. When I try and pair with the Sonoff I get the "incorrect password" message. I am using 12345678. Or it accepts the password and connects to the Sonoff itead wifi for a few seconds and then disconnects.

I have tried with two of the switches and get the same problem. I have looked at the itead guide and FAQs. I have raised a help ticket but am not getting a response. Can anyone help or give me advice?

14 people have this problem

I've the same problem, first time pairing worked like a charm, having another SONOFF in my network, unfortunately suddenly stop to work, so I removed the switch from the App but this time I couldn't pair anymore. I've explored all the different workarounds over here... (other phone, connecting thought the PC, assigning a static IP, everything and nothing worked). I think the firmware/memory got some corruption that's why the device can't offer any IP. Is there any way to reset to defaults / flash again this little paperweight? Thanks for the help.

SONOFF switches also works with me for approx. I tried 10 times for pairing and then accepted the password 12345678.

Much patience is needed. :)

Thanks for the previous posts.

Hi All 

I think I found a way to pair a Smart Sonoff 'touch' switch and it also works for the Sonoff TH10 switch that I had trouble unable to pair up and configure in the normal manner.

I noticed that when you power up the unit, and then hold the button to put into pairing mode, the LED flashes in its normal pairing mode for that type of device, however - continue to hold the button until the LED starts to flash fast continually (with no pauses) - this can take 10-30 seconds. Then you will notice that on your smartphone/ipad/android, that the "ITEAD....xxxxx"  SSID HAS APPEARED!.

then use the pairing function of the 'AP' or non-touch pairing mode to configure the device.

this worked in both cases with these two types of devices after I had exhausted all other options mentioned in this thread above.

I hope this helps for you!

I have downloaded iOS 11 before the native release on my iPhone. and I also having trouble of after installing iOS 11 Wi-Fi not working my iPhone. But on Google I found a solution to solve the problem and got rid of the problem easily.

- 1. Disable and Re-enable Wi-Fi Trigger

- 2. Reboot Your iDevice (iPhone)

- 3. Forget Wi-Fi Network and Rejoin

- 4. Reboot your Wired / Wireless Router/modem

- 5. Delete VPN App and test Wi-Fi again

And more information here -

Hello guys,

I Have 4 sonoff switch and 2 sonoff Th switch on my routeur and all is all right since 1 year (approximatively).

For using my Xiaomi mi robot vacuum, I need to change WEP protection to WPA protection.

I did it and the 4 sonoff switch works good but impossible to reconnect my 2 sonoff TH....

What can i do? I try lot of manipulation and nothing works...

Thanks in advance.

 having a log in onto the account would make things so much easyier 
Hi! LOL Oops, I meant router!! Log onto your router and see if it keeps a list of devices that have connected. If you see an ESP_xxxx device, remove or delete it from the list. Then try connecting/pairing the switch again. Brad
Hi Brad Where is the server? This is something that will help, can You post a link to the login page? Thanks
I was having the same problem so I logged into my server and found a ESP_153F0C device listed as a device that was connected to my network, but with errors ( I don't remember what the error said). I simply deleted/forgot the device from the server list and the password worked again and I was able to connect. I know very little about networks, so I don't have an explanation, but it seemed to work. Hope this helps someone. Brad

The problem my friends is that if your itead device only partially registers with the servers, YOU CAN NOT

simply delete and try again, which is why so many of you are having problems.

I discovered this the hard way!!!!

I have a itead 4ch switch working fine on my o2 mobile wifi device, as did my plug in adaptor and various other switches/power monitor etc, 6 in all. 

I deleted them from my account 1 by 1 and then added them 1 by 1 to my fixed line router.

All added and work except the 4ch switch.

It will add to any router, but NEVER come on line, except on the original o2 mobile wifi.

This is because it has not correctly cleared off the servers/account.

Unless I am mistaken only  support can delete off the server to put the switch back into never used condition. HOW STUPID IS THAT???? why cant we log in onto the server, view our accounts and delete ? or how about making the setting of the wifi simpler???

1.- Error de conexión con contraseña 12345678 se produce el error al no obtener la ip


1.- Presionar por 20 segundos el SonOff para reiniciar como fabrica

2.- Poner en ip fija al Android

3.- Conectar nuevamente y funciona.

This device is great. I was having trouble pairing. When both sides are connected, the device does not want to pairing. When I disconnect the wires at the output side, the device was immediately paired with the application and then I connect the wires to the output side. Now everything works great.
I had this problem too on iphone 6. Solution for me was to pair the device with laptop windows 7, password12345678 and then pair the device with iphone. That worked almost always immediately and if not only max 2 attempts were needed to get it working.


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Hi guys,

I came to this site totally frustrated with the same issues on my iPhone 6S (couldn't pair with the iOS app). The thing that worked for me was doing the following:

- Launch the app

- Click the add device button

- Put the Sonoff in pairing mode (press button down for 5 sec or so until it blinks fast)

- Use the 1st option (version 1 I think it says)

- When it tells you to go to your wi-fi settings, do everything it says, but if you are having problems connecting, click "Renew Lease" button (at the very bottom when you click on the ITD-xxxxx device

- You will, within 20 seconds or so, get an IP address from the device

- Continue in app, click continue, then connect to your router

Works like a champ! Hope this helps.

I had the same problem (password 12345678 not accepted on iPAD) on 2 different Sonoff switches.

But after repeated retrying (with ITEAD wifi selected on iPAD) it worked with both. The pairing process failed like 5 to 10 times on each device.

So I can only suggest to be patient with these things and keep trying. Good luck

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