RobotDyn library for Arduino

This is a RobotDyn Keypad 3x4 with analog output library for Arduino.

Hardware

Any Arduino / ESP8266 / ESP32 board with an ADC (Analog Digital Converter).

Pins

Keypad	Any Arduino board	WeMos D1 & R2 / Node MCU	WeMos LOLIN32
VCC	5V (or 3.3V)	3V3	3V3
GND	GND	GND	GND
OUT	A0 (ANALOG pin)	A0 (ADC0)	A0 = SVP (GPIO36)

Example

Arduino IDE | Examples | Erriez RobotDyn Keypad 3x4 Analog:

• ErriezPrintADC
• ErriezRobotDynKeypad3x4Analog

Documentation

• Online HTML
• Download PDF

Usage

Initialization

#include <ErriezRobotDynKeypad3x4Analog.h>

// Connect the keypad OUT pin to the ANALOG pin of an Arduino / ESP8266 / ESP32 board
#define KEYPAD_ANALOG_PIN   A0

// Create keypad object
RobotDynKeypad3x4Analog keypad(KEYPAD_ANALOG_PIN);

Get buttons

// Read buttons:
// -1:    Buttons up
// 0..11: Button down
int keypadState = keypad.getButtons();

Library dependencies

• None.

Library installation

Please refer to the Wiki page.

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