For Shelly Wi-Fi devices powered by a DC power supply:
Some Shelly devices do not operate solely on 230V AC power, but also, for example, on 24V DC power. If in such cases the Wi-Fi Shelly device cannot be paired with your phone or configured to the Wi-Fi network because the device’s Wi-Fi connection is unstable or the device intermittently disappears from the Wi-Fi AP list, it’s worth checking whether connecting it to 230V AC resolves the issue.
If the issue does not occur when using 230V AC power, then the problem was likely caused by the 24V DC power supply not delivering enough power for the relay to operate. As a result, the device may have restarted intermittently due to power supply issues, which caused pairing to fail or frequent disconnections from Wi-Fi after pairing. Using a higher-power 24V DC power supply may resolve the issue.
Is the Wi-Fi Shelly device too far from the router?
Shelly Gen2 (also known as Shelly Plus) and newer (Gen3 / Gen4) devices feature an ECO mode that reduces idle power consumption and also lowers the Wi-Fi chip’s performance.
If a Shelly device is experiencing Wi-Fi signal strength issues, try disabling ECO mode in the app or through the web configuration interface.
If this doesn’t solve the problem, consider switching the device to connect to a closer Wi-Fi Access Point if you are using a mesh system.
Shelly Wi-Fi Range Extender Function Can Help!
If you only have a single Wi-Fi router and no mesh, additional Access Point, or repeater in the network, you can use another Shelly device as a Wi-Fi repeater!
Shelly Gen2 (i.e. Shelly Plus) and newer (Gen3, Gen4) devices have a built-in Wi-Fi range extender function. This feature is disabled by default, but once enabled, the device will broadcast its own Wi-Fi network, allowing other Shelly devices installed farther from the router to connect. Using this unique function, Shelly devices themselves can form a Wi-Fi mesh-like network to improve coverage.
To configure this:
Open the device’s web interface in your browser by entering its IP address, or find the device in the app.
Navigate to the Network menu, then select the Range Extender option.
Enable the repeater function using the Enable switch.
Then, set a password for the new Wi-Fi network created by the device under Network > Access Point, and click Apply.
You can now connect other Shelly devices to the newly created Wi-Fi network, improving their connection to the main network. You can connect up to 10 devices to the network created by a single Shelly device using this function.
Tip: Before enabling the repeater function, ensure that the device's firmware is up to date.
More troubleshooting tips for Wi-Fi connection issues
You can find more troubleshooting tips for Wi-Fi connection issues here.
A Shelly device becomes periodically offline in the app after successful pairing
If pairing was successful but the Shelly device later becomes periodically offline in the app, the first step is to check whether the offline status is only shown in the app. Try accessing the device from the cloud web interface or directly via its IP address in a browser. If it's accessible, then the device is actually connected to the router and online — only the app is showing it as offline.
Devices paired to Wi-Fi and placed in cloud mode can be accessed in three ways:
In the Shelly Cloud app,
On the Shelly Cloud web interface via browser at https://control.shelly.cloud, logging in with the same email + password used in the app,
On the local network by opening the device’s local IP address in a browser (e.g., https://192.168.0.55/). You can view the current IP address in the Shelly App, or find it via your Wi-Fi router’s connected devices list. If you assigned a static IP during Wi-Fi setup, this makes it even easier as the address won’t change.
If the device shows as offline in the Shelly App, check (in cloud mode) at https://control.shelly.cloud whether it is online there, and (in both cloud and local mode) if it’s accessible via its IP address in a browser.
If so, then the device is in fact online, and it’s likely a network issue on your phone or a bug in the app causing the offline display. In this case, try:
Completely closing and restarting the app. If that doesn’t help:
Clear the app cache. If that still doesn’t help:
Reinstall the app.