**Abstract**

Data acquisition is a function that plays a fundamental role in the automatic supervision and system control, it combine the system (software and hardware) to the process to be controlled (real world). The field of application starts from research to automation, from industry to home automation, in practice everything that in some way must be performed without human supervision. Data acquisition systems are mainly used to measure physical phenomena such as: temperature, voltage, current, distance and pressure, shock and vibration, and displacement, RPM, angle and discrete events, weight. In order to measure it we need a DAQ, Data AcQuisition System, in this chapter we propose to use a cheap open source hardware: Arduino.

**Keywords:** Arduino, cheapest hardware, wiring code, LabView code, producer/consumer, SCADA system
