The battery level is low. Please place the sensor under sunlight for 1-2 days and try again. If the sunlight condition is not great, it may take extra days for the battery to charge up to the proper level.

1. It is possible that your WiFi router is too far away. We recommend a signal of at least 2 bars on your phone. It is possible that your router is an old one and runs on Wireless-B (11 Mbps). Whisperer only supports the newer standards (Wireless-N and Wireless-G). 2. Double check the password. You should enter the password of your home WiFi, not the password of your Netro account. 3. Make sure your router has access to the internet and it is not blocking port 1883 which is reserved for MQTT. Try to lower the security settings on the router/firewall. 4. Create a guest network which is usually hosted at 2.4G only and try to connect Whisperer with the guest network 5. Change the WiFi channel from your WiFi router. 6. Make sure the router is not blocking the Netro device. 7. Sometimes, rebooting your router can resolve some connection issues. Rebooting the modem might also help.

You need to reset the sensor to the HOST mode. Please refer to "How do I reset the sensor to the HOST mode?" in FAQ.

Press the button to turn on the sensor. 1. If the LED light flashes in red and then turns off quickly, the battery needs to be charged. 2. If the LED lights stays on for about 30 seconds and then becomes red, the sensor is unable to connect to the WiFi. Please try to move the sensor closer to the WiFi router. 3. If you changed your WiFi name/password or the above steps do not fix the issue, you will need to reset the WiFi connection for the sensor. Please go the Netro app -> Settings -> Sensors -> Select the sensor -> Change WiFi network/password.