If you are trying to connect a Shelly Wi-Fi device to your Wi-Fi network and your Shelly cloud account using the Shelly Smart Control app, but the pairing fails with an error message stating that the device is already registered to another account, then one of the following two cases applies:
(1) The device was previously paired (by you) with another Shelly account, and this prevents it from being registered to a new account.
The solution is simple: connect the device to any Wi-Fi network using the original account, and in the Shelly app use the FACTORY RESET function to remove it from the cloud account. After this, you will be able to pair it with a different Shelly account registered under another email address.
(Note: simply deleting the device from the app does not remove its cloud registration; only the Factory reset function does that.)
If you received or purchased the device from someone else and it is still linked to their original Shelly cloud account, only Shelly support can help remove it. In that case, email them at [email protected].
(2) The issue is caused by the fact that the first-generation Shelly device has a non-unique identifier, and another device with the same ID is already active in a user account.
This error mostly occurred between 2022 and 2023, affected relatively few devices, and both the cause and solution are known.
The cause: So many Shelly devices have been manufactured that unique identifiers for some models were exhausted. You're likely trying to register a device that has the same unique ID as one already registered in another account.
So the problem is not your device per se, but that the same identifier is already in use.
The solution: Shelly has extended the format of the device identifiers so that each device can again have a truly unique ID. A short command can be used to "extend" the identifier of devices affected by this issue, allowing them to be paired.
How to do this:
Connect to the device’s Wi-Fi network using your phone or PC.
Open a browser and go to http://192.168.33.1 – this is the device’s local admin interface.
Under Internet Settings, in the Wi-Fi Client section, enter your Wi-Fi network name (SSID) and password.
Once the device connects to your Wi-Fi, check the IP address assigned to it via your router’s admin interface.
Open a browser again and enter the IP address of your Shelly device (e.g.,
http://192.168.1.55/) to access the device’s web admin interface.Go to Settings > Firmware Update and check if there is a firmware update available. If yes, install it.
After updating, enter the following in your browser's address bar (based on the IP example above):
http://192.168.1.55/longifyidand press Enter.The device will change its unique identifier to a longer version and reboot automatically. You can now close the browser window.
Perform a factory reset on the device as described in the user manual.
Start the pairing process again from the beginning – now the device should successfully connect to your Shelly cloud account.