# Example E: Check all Addresses for Active Sensors and Start Continuous Measurements<!--! {#example_e_page} -->

This is a simple demonstration of the SDI-12 library for Arduino.

It discovers the address of all sensors active on a single bus and takes continuous measurements from them.

Every SDI-12 device is different in the time it takes to take a measurement, and the amount of data it returns.  This sketch will not serve every sensor type, but it will likely be helpful in getting you started.

Each sensor should have a unique address already - if not, multiple sensors may respond simultaneously to the same request and the output will not be readable by the Arduino.

To address a sensor, please see Example B: b_address_change.ino

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