I bought 3 devices (two Sonoff smart switch and Sonoff TH16). After a week, Sonoff smart switches are ok, but Sonoff TH16 is not working now - my app Ewelink tells me that it is offline. TH16 blinks quickly twice every 1s.
Informations about Sonoff TH16:
ESP_40C883 - it is name in my router
I tried many times to reconnect device (readd) - but app Ewelink still tells it is offline.
I found in my application Ewelink that firmware in TH16 is unknown.
Sonoff TH16 is connected with my router (it gives me feedbacks - ping)
I found out that I should try to connect and try ping to this server - eu-disp.coolkit.cc - it works and gives me feedback.
What do you think? Can you help me?
Thank you for your reply,
I met with the same problem (TH16 is offline).
Only TH16 stopped working properly 1 day ago (blinks quickly twice every 1s). Another devices (Wifi sockets and smart switch) are still working.
I tried following all recommendation but no results.
Can you solve a problem?
Thats interesting as I just got 2 new TH16's and the EWELINK registration works but they won't connect
to my WIFI ( blue light stays on ) and are listed as offline in my EWELINK app.
All my other Sonoff devices ( I have about 25 of them ) all work without problems, just this TH16 seems
to have some issue.
I hope this is resolved soon as otherwise they are useless and I wanted to buy more of them.
I have looked at a diagnostic help
and my light blinks 2 times quickly then repeats. According to the information this means my
TH16 does connect to my local wifi but cannot connection to the ITLEAD server so this would
seem to be a Server side problem they need to fix.
Something has changed causing this problem only with the TH16 but no other sonoff devices
I have since added another sonoff device ( RF Bridge ) after my failed attempts to connect the TH16 and
this worked so clearly the issue is with the TH16 devices and nothing else.
Have the same problem with both a POW and a TH16. Managed to connect a DIY without a problem.
I'm an Android user.
Hi guys :-) Nope no solution yet. I have gotten a response from ITEAD and will try that,
but they want to know the firmware version but in ewelink this is stated as "unknown"
at the moment. I suspect because its the ITEAD server that sets this value.
I also have a POW which works. I've got almost everything from them.
I'm enjoying the DIY Smart home Project I'm doing with the sonoff products and am looking forward to
them developing even more options/devices. They don't support scenarios in Alexa yet but that will come
They only problem I have is that my wife is harassing me for turning our house into a Smart Home Laboratory, she thinks its creepy.
I'm very happy that ITEAD has create all these products at a reasonable price, it will drive the Smart Home industry and world because I wouldn't spend thousands on overpriced hardware from the
name vendors when they don't offer anything more than the ITEAD Solutions.
That was the answer from ITEAD :
Dear david rogers,
Did you ever update TH firmware before offline?
Where are you come from?
The device firmware version?
Try to Make a smart phone as hotspot connect to Internet,use another smart phone connect device to this hotspot_can it work? if can't,how the device led blinking?
Please connect device to your server,even if device is offline.
And tell me your device ID, like ITEAD-10000xxxxx,you can see on the top of relay or pairing process or in Wlan
Also please submit this issue on ewlink feedback.