If you change the WiFi router / internet box or modify your WiFi configuration (SSID or password), you must then reset the scale's WiFi configuration.
To do this, repeat the scale's installation instructions.
- Installation of the HS5 scale from an iOS device (Apple).
- Installation of the HS5 scale from an Android device.
Note - Resetting the WiFi connection should be done only with one of the registered profiles.
*credit to Sylvain of iHealth Labs EU
https://helpcenter.ihealthlabs.eu/hc/en-gb/articles/115004001049-iHealth-HS5-How-to-reset-the-WiFi-connection