Analog Input

R2026b

Measure voltage of analog input pin

• 

Analog Input Common block

To add a block to a model, double-click the canvas and start typing the block name. Then, select the block from the list.

Libraries:
Simulink Support Package for Arduino Hardware / Common

Description

Add-On Required: This feature requires the Simulink Support Package for Arduino Hardware add-on.

Use the Analog Input block to measure the voltage of an analog pin relative to the analog input reference voltage on the Arduino^® hardware. The block outputs the measurement as a value that ranges from 0 to 1023.

• If the measured voltage equals the ground voltage, the block output emits 0.

• If the measured voltage equals the analog reference voltage, the block output emits 1023.

The default value of the analog input reference voltage for most of the Arduino boards is 5 V. To change the Analog input reference voltage parameter in your model Configuration Parameters, navigate to Hardware Implementation > Target hardware resources > Analog input channel properties.

The analog input reference voltage for Arduino Due, Nano 33 IoT, MKR boards, and Nano 33 BLE Sense boards is 3.3 V. You cannot change this value.

Warning

The range of the voltage that can be applied to the analog input pin depends on the analog input reference voltage. For details, read the documentation for your Arduino hardware.

Supported Arduino Boards

• Arduino Due

• Arduino Leonardo

• Arduino Mega 2560

• Arduino Mega ADK

• Arduino Micro

• Arduino MKR Wi-Fi^® 1010

• Arduino Nano 33 IoT

• Arduino MKR1000

• Arduino MKRZero

• Arduino Nano 3.0

• Arduino Uno

• Arduino Robot Control Board

• Arduino Robot Motor Board

• Arduino Nano 33 BLE Sense

• Arduino compatible ESP32-WROOM and ESP32-WROVER

• Arduino compatible ESP32-S3 Series

• Arduino Nano ESP32

• Arduino compatible Teensy 4.0

• Arduino compatible Teensy 4.1

• Arduino Nano RP2040 Connect

• Arduino Uno R4 Wi-Fi

• Arduino Uno R4 Minima

• Arduino Nano R4

• Arduino compatible Raspberry Pi Pico

• Arduino compatible Raspberry Pi Pico W

Ports

Output

Pin 1 value — Voltage of analog input pin

scalar

The block outputs the digitally converted voltage value that is received on the analog input pin of the Arduino board.

Data Types: double

Parameters

Pin number — ADC pin number

4 (default) | Arduino board pin number

Specify the Arduino board analog input pin number. To open the Arduino pin mapping table, click View pin map. To know how to assign pins for the block, see Pin Mapping for Arduino Timer-Independent Blocks.

Sample time — Time interval at which the blocks read input pin value

–1 (default) | scalar

Specify how often the block measures voltage of the analog input pin, in seconds. Enter a value greater than zero. When you specify this parameter as –1, Simulink^® determines the best sample time for the block based on the block context within the model.

Version History

Introduced in R2014a