Project #11: ESP32 Feather – SHARP Display – Mk01

ESP32 Feather – SHARP Display

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Adafruit HUZZAH32 ESP32 Feather Board

The HUZZAH32 is our ESP32-based Feather, made with the official WROOM32 module. We packed everything you love about Feathers: built in USB-to-Serial converter, automatic bootloader reset, Lithium Ion/Polymer charger, and just about all of the GPIOs brought out so you can use it with any of our Feather Wings.

That module nestled in at the end of this Feather contains a dual-core ESP32 chip, 4 MB of SPI Flash, tuned antenna, and all the passives you need to take advantage of this powerful new processor. The ESP32 has both WiFi and Bluetooth Classic/LE support. That means it’s perfect for just about any wireless or Internet-connected project.

Adafruit SHARP Memory Display Breakout – 1.3″ 168×144 Monochrome

The 1.3″ 168×144 SHARP Memory LCD display is a cross between an eInk (e-paper) display and an LCD. It has the ultra-low power usage of eInk and the fast-refresh rates of an LCD. This model has a gray background, and pixels show up as black-on-gray for a nice e-reader type display. It does not have a backlight, but it is daylight readable. For dark/night reading you may need to illuminate the LCD area with external LEDs.

DonLuc1908Mk01

1 x Adafruit HUZZAH32 ESP32 Feather
1 x Adafruit SHARP Memory Display
1 x LED Green
1 x 100 Ohm
9 x Jumper Wires 3″ M/M
1 x Full-Size Breadboard
1 x SparkFun Cerberus USB Cable

Adafruit HUZZAH32 ESP32 Feather

LG1 – Digital 21
SCK – Digital 13
MOS – Digital 12
SSD – Digital 27
GND – GND
VIN – +3.3V

DL1908Mk01p.ino

// ***** Don Luc Electronics *****
// Software Version Information
// Project #11: HUZZAH32 ESP32 Feather - SHARP Display - Mk01
// 08-01
// DonLuc1908Mk01p.ino 08-01
// Adafruit HUZZAH32 ESP32 Feather Board
// SHARP Display
// LED Green

// include Library Code
#include <Adafruit_SharpMem.h>
#include <Adafruit_GFX.h>

// SHARP Memory Display
// any pins can be used
#define SHARP_SCK  13
#define SHARP_MOSI 12
#define SHARP_SS   27
// Set the size of the display here, e.g. 144x168!
Adafruit_SharpMem display(SHARP_SCK, SHARP_MOSI, SHARP_SS, 144, 168);
// The currently-available SHARP Memory Display (144x168 pixels)
// requires > 4K of microcontroller RAM; it WILL NOT WORK on Arduino Uno
// or other <4K "classic" devices!
#define BLACK 0
#define WHITE 1
int minorHalfSize; // 1/2 of lesser of display width or height

// LED Green
int iLEDGreen =  21;          // LED Green

void loop() {

  // iLEDGreen Off
  digitalWrite(iLEDGreen, LOW);
  // SHARP Memory Display Off
  isDisplayOff();
  delay(2000);
  // iLEDGreen On
  digitalWrite(iLEDGreen, HIGH);
  // SHARP Memory Display On
  isDisplayOn();
  delay(2000);
  
}

getDisplay.ino

// SHARP Memory Display On
void isDisplayOn() {

    // Clear Display
    display.clearDisplay();
    // text display tests
    display.setRotation(4);
    //display.clearDisplay();
    display.setTextSize(5);
    display.setTextColor(BLACK);
    display.setCursor(10,25);
    display.println("LED");
    display.setCursor(10,75);
    display.println("On");
    display.refresh();

}
// SHARP Memory Display Off
void isDisplayOff() {

    // Clear Display
    display.clearDisplay();
    // text display tests
    display.setRotation(4);
    //display.clearDisplay();
    display.setTextSize(5);
    display.setTextColor(BLACK);
    display.setCursor(10,25);
    display.println("LED");
    display.setCursor(10,75);
    display.println("Off");
    display.refresh();

}

setup.ino

// Setup
void setup() {

  // SHARP Display start & clear the display
  display.begin();
  display.clearDisplay();
  
  // Initialize the LED Green
  pinMode(iLEDGreen, OUTPUT);
    
}

Don Luc