The Dragino LWL02 is a LoRaWAN Water Sensor. When there is water between the two metal probes, LWL02 indicates a water leak event and uplinks to IoT server via LoRaWAN network. The LWL02 will send periodically data every day as well as for each water leak event. It also counts the water leak times and calculates the last water leak duration. This device is powered by 2 x AAA replaceable batteries.