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© Guido Kramann

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1. New small examples for using the screen, touchscreen, button, IMU sensor, and real-time clock

1.1 Using the function editor(...)

#include "twatch.h"
#include "variables.h"
#include "functions.h"

void setup() 
{
    setupTWATCH();
    setFont(1, 255,255,255,  0,0,0);
    backlight(true); 
}

void loop() 
{
    cursor(0,0);     
    editor("Hello\n");
    editor("Editor\n");
    editor("01234567890123456\n");
    editor("17 Spalten\n");
    editor("9 Zeilen\n");
    editor("Zeile 6\n");
    editor("Zeile 7\n");
    editor("Zeile 8\n");
    editor("Zeile 9\n");
    delay(100);      
}

Code 0-1: 1.1 Using the function editor(...)

TWATCH_PROC023_B001.zip -- 1.1 Using the function editor(...)

Bild 0-1: View of the clock -- 1.1 Using the function editor(...)

1.2 Using the function button()

#include "twatch.h"
#include "variables.h"
#include "functions.h"

bool zeigeText = false;

void setup() 
{
    setupTWATCH();
    setFont(1, 255,255,255,  0,0,0);
    backlight(true); 
}

void loop() 
{
  
    if(button())
    {
         zeigeText=!zeigeText;
    }
    
    if(zeigeText)
    {
        cursor(50,100);     
        editor("Hello");
    }
    else
    {
        background(0,255,0);
    }
    
    delay(100);      
}

Code 0-2: 3.2 Using the function button()

TWATCH_PROC023_B002.zip -- 1.2 Using the function button()

Bild 0-2: 1.2 Using the function button() ... after pressing the button once.

1.3 Using the Radio-Controlled Clock

#include "twatch.h"
#include "variables.h"
#include "functions.h"

bool zeigeText = false;

void setup() 
{
    setupTWATCH();
    setFont(1, 255,255,255,  0,0,0);
    updateTime(); //RTC Zeit holen    
    backlight(true); 
}

void loop() 
{
    int h = getHour();
    int m = getMinute();
    int s = getSecond();
    cursor(0,0);
    if(h<10)
    {
        editor('0');
    }
    editor(h);
    editor(':');
    if(m<10)
    {
        editor('0');
    }
    editor(m);
    editor(':');
    if(s<10)
    {
        editor('0');
    }
    editor(s);

    fill(255,0,0);
    noStroke();
    rect(0,120,s*4,120);
    fill(0,0,0);
    rect(s*4,120,239-s*4,120);    
    delay(100);      
}

Code 0-3: 1.3 Using the Radio-Controlled Clock

TWATCH_PROC023_B003.zip -- 1.3 Using the Radio-Controlled Clock

Bild 0-3: 1.3 Using the Radio-Controlled Clock

1.4 Using the Accelerometer and Vibration Motor

#include "twatch.h"
#include "variables.h"
#include "functions.h"

void setup() 
{
    setupTWATCH();
    setupMotor();
    setFont(1, 255,255,255,  0,0,0);
    backlight(true); 
}

void loop() 
{
    acceleration();
    cursor(0,0);
    editor(absaccX);    
    editor('\n');
    editor(absaccY);    
    editor('\n');
    if(absaccZ<1000) editor('0');
    if(absaccZ<100) editor('0');
    if(absaccZ<10) editor('0');
    editor(absaccZ);    

    stroke(0,0,255);
    if(absaccZ<300)
    {
        motor();
        fill(255,0,0);
    }
    else
    {
        fill(0,255,0);        
    }
    circle(120,120,50);
    delay(100);      
}

Code 0-4: 3.4 Using the Accelerometer and Vibration Motor

TWATCH_PROC023_B004.zip -- 1.4 Using the Accelerometer and Vibration Motor

Bild 0-4: 1.4 Verwendung des Beschleunigungssensors und des Vibrationsmotors während Alarm.

Small projects for an application program using the internal peripherals covered so far

Exercise 1

Write a program that activates the vibration motor for one second at the start of every full minute.

Exercise 2

In 1.4, the display of absaccX and absaccY is not perfect:
If small numbers appear first, followed by large ones, the old digits remain on the display.
Fix this by following the example of how absaccZ is displayed.

The variables accX, accY, and accZ return the acceleration values with signs, rather than just the absolute values.
Analyze how the signed display is implemented here in "Code 4-4: Sample Code" under "IMU (Inertial Measurement Unit)":

06_TWATCH/04_Simplified_Commands -- siehe Code 4-4.

Exercise 3

The millis() function returns the number of milliseconds that have elapsed since the timer was started.
Based on this, try to program a timer that triggers an alarm 10 seconds after the button is pressed.
The alarm should be acknowledged and turned off by pressing the button again.
The alarm should be triggered both by displaying an appropriate graphic and by activating the vibration.

Note: Call millis() with a type cast to integer, for example: int t = (int)millis();

Exercise 4

Come up with your own small application for the smartwatch.
Think of at least two fault-tolerance patterns that could be used in your project.
Implement your idea as far as possible.