A red indication from the Vetrax Sensor LED during normal operations means the sensor battery has depleted and needs to be charged. Simply remove the sensor from the base-plate, and charge it using the USB cable and charger provided in the box with your sensor.

In addition, once your battery reaches a charge level of 0% you will not be able to connect to the sensor with your app, nor can the sensor connect to Wi-Fi to upload data to the Vetrax Cloud.

Note: ​Once the sensor is on the charger (at least two hours of charging is recommended), all operations on the Vetrax sensor will return to normal.

For more information about various Vetrax Sensor LED indications, please reference the following article:  

Vetrax™ Sensor LED indicators