If you changed wifi network, you will see the orange light blink few times, and should turn solid on.
If you changed from dhcp to static or vice versa, please repower your sensor once.
If you changed the wifi network, remember to connect your laptop or phone to that wifi network in order to access the sensor locally.
If sensor is unable to bootup with the updated SSID/ and or network parameters, or If you are unable to access the sensor, you can always reset the sensor and start over by connecting to Sensor-Setup WiFi network, and accessing the sensor at 192.168.4.1.