What to do if the Smappee App states that the serial number of the Smappee Audio & Video Accessories gateway is invalid during installation?
- GGarrett ColemanSep 7, 2025
The serial number might be incorrect, so check if you are scanning the serial number of the gateway. Alternatively, the gateway may have already been installed at another location, in which case you should carry out a factory reset on the gateway.


