When you can power up the Sonoff WiFi socket/switch or other models normally but fail to control it (offline), the first thing you should do is to check the blinking status of green indicator LED blinking status. Usually, there are two kinds of blinking statuses:
1. Green LED quickly blinks one time and repeats (blinks once every 2s), which means the device has failed to connect to the router.
2. Green LED quickly blinks twice and repeats, which means the device has connected to the router but fail to connect to the server.
3. The LED blinks once every 1s, and the device is offline.
The device has successfully connected to the router but hasn’t been added to the user’s account. Please power off the device and restart, then wait for a while. If the device is still offline, please delete it and re-add.
If you have deleted it and tried to re-add for several times but still failed, please try below:
a. Prepare another phone, enable its hotspot. Use your phone to connect the hotspot WiFi and add devices to eWeLink. If it is online successfully, this means that the problem is due to WiFi. Please check your router settings.
b. If it’s still offline, please contact seller for return&exchange.
After judging the problem, you can troubleshoot the problems accordingly with below solutions.
Other Issues to Cause Offline Problem
Upgrading Firmware Causes Offline
In some conditions, upgrading firmware will cause MAC address change, then your device will become offline. Below is the firmware list that will cause MAC address change.
MAC address change when
Upgrade to versions higher than 1.5.2
Upgrade to versions higher than 1.5.2
Upgrade to versions higher than 1.3.0
Upgrade to versions higher than 2.0.2
Upgrade to versions higher than 2.0.1
When this happens, please bind your device’s MAC address to your router’s binding list, as follows:
Go to Router Settings -> Close MAC Filter -> Connect your device to the router -> Add the device MAC address to the MAC Binding list -> Enable MAC Filter
If you don’t know about your firmware well, please submit a feedback on the App eWeLink.
10 Solutions to Failed to Connect to the Router
1. Wrong WiFi Name or Password
You may have entered wrong WiFi name and password in the pairing process. Please delete the device and re-add. Please make sure you have entered them exactly and select remember password.
2. Weak WiFi Signal
Your device may be too far away from the router, which causes a weak WiFi signal. Please try again with strong WiFi signal.
Note: our devices can't connect to 5G WiFi, only 2.4G WiFi supported.
3. Phone Unable to Connect to WiFi
Your router or phone may come across some error, which causes a connection failure. Please make sure your phone can access the WiFi router and works normally. If your phone has WiFi network in the Access Point but the device still fails to connect to the router, please refer to below solutions.
4. Too many devices connect to the AP
There might be too many devices connect to the AP which connects to with the router, please turn off the devices or turn off the AP and try again
5. Too Many Connections to One Router
You may have too many devices connecting to one router. Most of the routers have connection limit. Please disconnect other devices, then power off and restart your device.
6. Change DHCP Settings
You may have too many devices connecting to one router. Please reset DHCP address pool in router settings, then power off and restart the device to connect again.
7. Router Error
Router error. Please restart your router and try again.
8. MAC Address Prohibited
For some security reason, your MAC address may be filtered and prohibited. Under such a condition, you should remove it from the prohibited address list.
9. MAC Address Conflict
Close all other connected devices to this router and try again.
10. DHCP tenancy term problem
Prohibit DHCP or extending DHCP tenancy term when DHCP is open.
Under the condition of disabled DHCP or open DHCP, you can extend the lease.
8 Solutions to Failed to Connect to Server
We are upgrading the server or there exists server error. If the server is running normally. Please check below:
1. Unable to Visit the Internet
If the extranet cannot be accessed, then use your phone or PC to visit the Internet. If successful, try to connect your device again.
If you have stopped paying Internet fee or extending your network service, your can’t visit the Internet.
You may have downloaded too many files at the same time, which occupied most of the bandwidth, thus your device did not have enough bandwidth to connect to the server. If so, please stop downloading and try to re-add your device.
If your other apps can be run normally, only eWeLink display offline, the problem should be your wireless carrier can’t resolve the address of eWeLink server. Please manually change DNS to 188.8.131.52 or 184.108.40.206, then re-connect.
3.More than one router with the same SSID (name)
You may have more than one router with the same name, and your device may have connected to the non-networked one. In this case, you should reset your router name and choose the networked one to connect. Then try to connect your device again.
4.More than one DHCP server on one network
There may be errors existing between router topology. In this case, please check the connection way between routers, then try again.
If you have checked all above and found them no problems, maybe some terminal of the local area network you are locating has affected ARP virus. We suggest you to manually bind gateway and MAC address, then try again.
You may have opened firewall or some security software. In this case, please temporarily close them and try to connect the device again.
7.DNS Server Inaccessible
After making all above checks and finding them no problems, the possible problem should be DNS error. Please manually change DNS server address and try again.
After making all above checks and find no problems but still failed, the possible problem should be DNS error. Please manually change DNS server address to 220.127.116.11. Then try to re-add your device.
8. IP address conflict
Please close all other connections that connect to the router. Then try to re-add your device.
You can also ping our server address on your computer. Please select the server address according to your location. Then send the result to our support. If you don't know how to ping, please check this post.
Please submit a feedback on eWeLink, describe your problem in details. If you have a hardware problem, please submit a new ticket in our Smart Home Forum. We will follow up on your ticket.
Our support will deal with your issue as soon as possible in working time. Our working time is Monday ~ Friday, 9:00 to 18:00 Beijing time, Time Zone:8.
You can download it from Google Play. Thank you!
Changing DNS for me did not help. My Pow device cannot connect to the Amazon IP 18.104.22.168.
sonoff 4 cnl babamın telefonuna kaydettım simdi kendi telefonuma kaydettmek ıstıyorum ama urun kayıtlıdıyor ne yapmam gerekıyor..
ne dıyosun hırr