Check whether the gateway's LED is lit orange. The lamp lights up orange when the gateway is in access mode and transmits its own WLAN. Only then can you pair your terminal device with the gateway via WLAN. To activate the access mode, press the reset button on the back of the device until the following color sequence is displayed by the LED green → orange → red → release the button.
ATTENTION: All data, taught-in devices and settings of the gateway will be deleted during this process.