# Status LED

A green LED on top of the enclosure is the status indicator of the S2 module. It indicates operations and modes as described in the table below. 

<table><thead><tr><th width="124">OFF</th><th width="102">ON</th><th>Status</th></tr></thead><tbody><tr><td>Yes</td><td>No</td><td>Power off or node faulty</td></tr><tr><td>3s</td><td>1s</td><td>Normal, no sensor connected</td></tr><tr><td>1s</td><td>3s</td><td>Normal, sensor connected</td></tr><tr><td>1s</td><td>1s</td><td>Error state, no connection over radio</td></tr><tr><td>No</td><td>Yes</td><td>Initiation (max 30s after power on).</td></tr></tbody></table>

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