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#DonLucElectronics #DonLuc #Time #DS3231PrecisionRTC #SHARPMemoryDisplay #Arduino #ESP32 #SparkFunThingPlusESP32WROOM #Project #Programming #Electronics #Microcontrollers #Consultant #VideoBlog
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Adafruit SHARP Memory Display Breakout – 1.3 Inches – 168 Pixels x 144 Pixels Monochrome
The 1.3 inches 168 pixels x 144 pixels SHARP Memory LCD display is a cross between an eInk 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.
The display is write only which means that it only needs 3 pins to send data. However, the downside of a write-only display is that the entire 168×144 bits must be buffered by the microcontroller driver. That means you cannot use this with an ATmega328 or ATmega32u4. You must use a high-RAM chip such as ATSAMD21, Teensy 3, ESP8266, ESP32, etc. On those chips, this display works great and looks wonderful.
DL2108Mk02
1 x SparkFun Thing Plus – ESP32 WROOM
1 x Adafruit SHARP Memory Display
1 x DS3231 Precision RTC FeatherWing
1 x CR1220 3V Lithium Coin Cell Battery
1 x Terminal Block Breakout FeatherWing
1 x Lithium Ion Battery – 850mAh
1 x Half-Size Breadboard
1 x SparkFun Cerberus USB Cable
SparkFun Thing Plus – ESP32 WROOM
SCK – Digital 13
MSI – Digital 12
SS0 – Digital 27
SDA – Digital 23
SDL – Digital 22
VIN – +3.3V
GND – GND
DL2108Mk02p.ino
/* ***** Don Luc Electronics © *****
Software Version Information
Project #19: Time -SHARP Memory Display - Mk02
08-02
DL2108Mk02p.ino
1 x SparkFun Thing Plus - ESP32 WROOM
1 x Adafruit SHARP Memory Display
1 x DS3231 Precision RTC FeatherWing
1 x CR1220 3V Lithium Coin Cell Battery
1 x Terminal Block Breakout FeatherWing
1 x Qwiic Cable - 50mm
1 x Lithium Ion Battery - 850mAh
1 x Half-Size Breadboard
1 x SparkFun Cerberus USB Cable
*/
// Include the Library Code
#include <Wire.h>
// SHARP Memory Display
#include <Adafruit_SharpMem.h>
#include <Adafruit_GFX.h>
// Date and time DS3231 RTC
#include <RTClib.h>
// SHARP Memory Display
#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
// Set this to 1000 to get _about_ 1 second timing
const int CLOCK_SPEED = 1000;
// Last Draw
unsigned long lastDraw = 0;
// Date and time functions using a DS3231 RTC
RTC_DS3231 RTC;
String sDate;
String sTime;
// Software Version Information
// Version
String sver = "19-02";
void loop()
{
// Check if we need to update date, time
if (lastDraw + CLOCK_SPEED < millis())
{
// Last Draw
lastDraw = millis();
// Dates and Time
timeRTC();
// is OLED
//isOLED();
isDisplayDate();
}
}
getDisplay.ino
// SHARP Memory Display
// SHARP Memory Display - UID
void isDisplayUID() {
// Text Display
// Clear Display
display.clearDisplay();
display.setRotation(4);
display.setTextSize(3);
display.setTextColor(BLACK);
// Don Luc Electronics
display.setCursor(0,10);
display.println( "Don Luc" );
display.setTextSize(2);
display.setCursor(0,40);
display.println( "Electronics" );
// Version
display.setTextSize(3);
display.setCursor(0,70);
display.println( "Version" );
display.setTextSize(2);
display.setCursor(0,100);
display.println( sver );
// Refresh
display.refresh();
delay( 100 );
}
// Display Date
void isDisplayDate() {
// Text Display Date
// Clear Display
display.clearDisplay();
display.setRotation(4);
display.setTextSize(2);
display.setTextColor(BLACK);
// Date
display.setCursor(0,5);
display.println( sDate );
// Time
display.setCursor(0,30);
display.println( sTime );
// Refresh
display.refresh();
delay( 100 );
}
getRTCDS3231.ino
// DS3231 Precision RTC
// Setup RTC
void setupRTC() {
// DS3231 Precision RTC
RTC.begin();
if (! RTC.begin()) {
while (1);
}
DateTime now = RTC.now();
if (RTC.lostPower()) {
// Following line sets the RTC to the date & time this sketch was compiled
RTC.adjust(DateTime(F(__DATE__), F(__TIME__)));
// This line sets the RTC with an explicit date & time, for example to set
// August 2, 2021 at 13:53:0 you would call:
// RTC.adjust(DateTime(2021, 8, 2, 14, 11, 0));
}
}
// timeRTC
void timeRTC() {
// DS3231 Precision RTC
sDate = "";
sTime = "";
// Date Time
DateTime now = RTC.now();
// sData
sDate += String(now.year(), DEC);
sDate += "/";
sDate += String(now.month(), DEC);
sDate += "/";
sDate += String(now.day(), DEC);
// sTime
sTime += String(now.hour(), DEC);
sTime += ":";
sTime += String(now.minute(), DEC);
sTime += ":";
sTime += String(now.second(), DEC);
}
setup.ino
// Setup
void setup()
{
// Give display time to power on
delay(100);
// Set up I2C bus
Wire.begin();
// SHARP Display Start & Clear the Display
display.begin();
// Clear Display
display.clearDisplay();
// Display UID
isDisplayUID();
// Setup RTC
setupRTC();
delay( 5000 );
}
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