通訊

// 用 Serial 傳遞資料

int incomingByte = 0; // 用來儲存收進來的 data byte

void setup() {

    Serial.begin(9600);

    Serial.println("Hello Arduino");

}

void loop() {

    // 檢查是否有資料可供讀取

    if (Serial.available()>0){

        // 讀取進來的 byte

        incomingByte = Serial.read();

        // 印出收到的資料

        Serial.print("data received: ");

        Serial.print(incomingByte, DEC);

        Serial.print(", ");

        Serial.print(incomingByte, HEX);

        Serial.print(" (HEX)");

        Serial.println((char)incomingByte);

    }

}

#include <SoftwareSerial.h>

SoftwareSerial mySerial(10, 11); // RX, TX

void setup(){

    Serial.begin(9600);

    mySerial.begin(9600);

    mySerial.println("This is Uno 1 Speaking......");

}

void loop(){

    if (mySerial.available())

        Serial.write(mySerial.read());

    if (Serial.available()){

        mySerial.print("Uno 2 Speaking ");

        mySerial.write(Serial.read());

        mySerial.println(" to me!");

    }

}

#include <Wire.h>

void setup(){

    Wire.begin();

    Serial.begin(9600);

    Serial.println("\nI2C Scanner");

}

void loop(){

    byte error, address;

    int nDevices;

    Serial.println("Scanning...");

    nDevices = 0;

    for(address = 1; address < 127; address++ ){

        Wire.beginTransmission(address);

        error = Wire.endTransmission();

        if (error == 0){

            Serial.print("I2C device found at address 0x");

            if (address<16){

                Serial.print("0");

            }

            Serial.print(address,HEX);

            Serial.println("!");

            nDevices++;

        }else if (error==4){

            Serial.print("Unknow error at address 0x");

            if (address<16){

                Serial.print("0");

            }

            Serial.println(address,HEX);

        }

    }

    if (nDevices == 0){

        Serial.println("No I2C devices found\n");

    }else{

        Serial.println("done\n");

    }

    delay(5000);

}

#include <Wire.h>

#include <Adafruit_GFX.h>

#include <Adafruit_SSD1306.h>

#define OLED_RESET 4

Adafruit_SSD1306 display(OLED_RESET);

#define NUMFLAKES 10

#define XPOS 0

#define YPOS 1

#define DELTAY 2

#define LOGO16_GLCD_HEIGHT 16

#define LOGO16_GLCD_WIDTH  16

static const unsigned char PROGMEM logo16_glcd_bmp[] ={

    B00000000, B11000000,B00000001, B11000000,B00000001, B11000000,B00000011, B11100000,

    B11110011, B11100000,B11111110, B11111000,B01111110, B11111111,B00110011, B10011111,

    B00011111, B11111100,B00001101, B01110000,B00011011, B10100000,B00111111, B11100000,

    B00111111, B11110000,B01111100, B11110000,B01110000, B01110000,B00000000, B00110000

};

#if (SSD1306_LCDHEIGHT != 64)

#error("Height incorrect, please fix Adafruit_SSD1306.h!");

#endif

void setup(){

    display.display();

    delay(2000);

    display.clearDisplay();

    // draw a single pixel

    display.drawPixel(10, 10, WHITE);

    display.display();

    delay(2000);

    display.clearDisplay();

    // draw many lines

    testdrawline();

    display.display();

    delay(2000);

    display.clearDisplay();

    // draw rectangles

    testdrawrect();

    display.display();

    delay(2000);

    display.clearDisplay();

    // draw multiple rectangles

    testfillrect();

    display.display();

    delay(2000);

    display.clearDisplay();

    // draw mulitple circles

    testdrawcircle();

    display.display();

    delay(2000);

    display.clearDisplay();

    // draw a white circle, 10 pixel radius

    display.fillCircle(display.width()/2, display.height()/2, 10, WHITE);

    display.display();

    delay(2000);

    display.clearDisplay();

    testdrawroundrect();

    delay(2000);

    display.clearDisplay();

    testfillroundrect();

    delay(2000);

    display.clearDisplay();

    testdrawtriangle();

    delay(2000);

    display.clearDisplay();

    testfilltriangle();

    delay(2000);

    display.clearDisplay();

    // draw the first ~12 characters in the font

    testdrawchar();

    display.display();

    delay(2000);

    display.clearDisplay();

    // draw scrolling text

    testscrolltext();

    delay(2000);

    display.clearDisplay();

    // text display tests

    display.setTextSize(1);

    display.setTextColor(WHITE);

    display.setCursor(0,0);

    display.println("Hello, world!");

    display.setTextColor(BLACK, WHITE); // 'inverted' text

    display.println(3.141592);

    display.setTextSize(2);

    display.setTextColor(WHITE);

    display.print("0x"); display.println(0xDEADBEEF, HEX);

    display.display();

    delay(2000);

    // miniature bitmap display

    display.clearDisplay();

    display.drawBitmap(30, 16,  logo16_glcd_bmp, 16, 16, 1);

    display.display();

    // invert the display

    display.invertDisplay(true);

    delay(1000);

    display.invertDisplay(false);

    delay(1000);

    // draw a bitmap icon and 'animate' movement

    testdrawbitmap(logo16_glcd_bmp, LOGO16_GLCD_HEIGHT, LOGO16_GLCD_WIDTH);

}

void loop() {

}

void testdrawbitmap(const uint8_t *bitmap, uint8_t w, uint8_t h) {

    uint8_t icons[NUMFLAKES][3];

    srandom(666);     // whatever seed

    // initialize

    for (uint8_t f=0; f< NUMFLAKES; f++) {

        icons[f][XPOS] = random() % display.width();

        icons[f][YPOS] = 0;

        icons[f][DELTAY] = random() % 5 + 1;

    }

    while (1) {

    // draw each icon

        for (uint8_t f=0; f< NUMFLAKES; f++) {

            display.drawBitmap(icons[f][XPOS], icons[f][YPOS], logo16_glcd_bmp, w, h, WHITE);

        }

        display.display();

        delay(200);

        // then erase it + move it

        for (uint8_t f=0; f< NUMFLAKES; f++) {

            display.drawBitmap(icons[f][XPOS], icons[f][YPOS],  logo16_glcd_bmp, w, h, BLACK);

            // move it

            icons[f][YPOS] += icons[f][DELTAY];

            // if its gone, reinit

            if (icons[f][YPOS] > display.height()) {

                icons[f][XPOS] = random() % display.width();

                icons[f][YPOS] = 0;

                icons[f][DELTAY] = random() % 5 + 1;

            }

        }

    }

}

void testdrawchar(void) {

    display.setTextSize(1);

    display.setTextColor(WHITE);

    display.setCursor(0,0);

    for (uint8_t i=0; i < 168; i++) {

        if (i == '\n'){

            continue;

        }

        display.write(i);

        if ((i > 0) && (i % 21 == 0)){

            display.println();

        }

    }  

    display.display();

}

void testdrawcircle(void) {

    for (int16_t i=0; i<display.height(); i+=2) {

        display.drawCircle(display.width()/2, display.height()/2, i, WHITE);

        display.display();

    }

}

void testfillrect(void) {

    uint8_t color = 1;

    for (int16_t i=0; i<display.height()/2; i+=3) {

        // alternate colors

        display.fillRect(i, i, display.width()-i*2, display.height()-i*2, color%2);

        display.display();

        color++;

    }

}

void testdrawtriangle(void) {

    for (int16_t i=0; i<min(display.width(),display.height())/2; i+=5) {

        display.drawTriangle(display.width()/2, display.height()/2-i,

        display.width()/2-i, display.height()/2+i,

        display.width()/2+i, display.height()/2+i, WHITE);

        display.display();

    }

}

void testfilltriangle(void) {

    uint8_t color = WHITE;

    for (int16_t i=min(display.width(),display.height())/2; i>0; i-=5) {

        display.fillTriangle(display.width()/2, display.height()/2-i,

        display.width()/2-i, display.height()/2+i,

        display.width()/2+i, display.height()/2+i, WHITE);

        if (color == WHITE){

            color = BLACK;

        }else{

            color = WHITE;

        }

        display.display();

    }

}

void testdrawroundrect(void) {

    for (int16_t i=0; i<display.height()/2-2; i+=2) {

        display.drawRoundRect(i, i, display.width()-2*i, display.height()-2*i, display.height()/4, WHITE);

        display.display();

    }

}

void testfillroundrect(void) {

    uint8_t color = WHITE;

    for (int16_t i=0; i<display.height()/2-2; i+=2) {

        display.fillRoundRect(i, i, display.width()-2*i, display.height()-2*i, display.height()/4, color);

        if (color == WHITE){

            color = BLACK;

        }else{

            color = WHITE;

        }

        display.display();

    }

}

void testdrawrect(void) {

    for (int16_t i=0; i<display.height()/2; i+=2) {

        display.drawRect(i, i, display.width()-2*i, display.height()-2*i, WHITE);

        display.display();

    }

}

void testdrawline() {

    for (int16_t i=0; i<display.width(); i+=4) {

        display.drawLine(0, 0, i, display.height()-1, WHITE);

        display.display();

    }

    for (int16_t i=0; i<display.height(); i+=4) {

        display.drawLine(0, 0, display.width()-1, i, WHITE);

        display.display();

    }

    delay(250);

    display.clearDisplay();

    for (int16_t i=0; i<display.width(); i+=4) {

        display.drawLine(0, display.height()-1, i, 0, WHITE);

        display.display();

    }

    for (int16_t i=display.height()-1; i>=0; i-=4) {

        display.drawLine(0, display.height()-1, display.width()-1, i, WHITE);

        display.display();

    }

    delay(250);

    display.clearDisplay();

    for (int16_t i=display.width()-1; i>=0; i-=4) {

        display.drawLine(display.width()-1, display.height()-1, i, 0, WHITE);

        display.display();

    }

    for (int16_t i=display.height()-1; i>=0; i-=4) {

        display.drawLine(display.width()-1, display.height()-1, 0, i, WHITE);

        display.display();

    }

    delay(250);

    display.clearDisplay();

    for (int16_t i=0; i<display.height(); i+=4) {

        display.drawLine(display.width()-1, 0, 0, i, WHITE);

        display.display();

    }

    for (int16_t i=0; i<display.width(); i+=4) {

        display.drawLine(display.width()-1, 0, i, display.height()-1, WHITE);

        display.display();

    }

    delay(250);

}

void testscrolltext(void) {

    display.setTextSize(2);

    display.setTextColor(WHITE);

    display.setCursor(10,0);

    display.clearDisplay();

    display.println("scroll");

    display.display();

    display.startscrollright(0x00, 0x0F);

    delay(2000);

    display.stopscroll();

    delay(1000);

    display.startscrollleft(0x00, 0x0F);

    delay(2000);

    display.stopscroll();

    delay(1000);  

    display.startscrolldiagright(0x00, 0x07);

    delay(2000);

    display.startscrolldiagleft(0x00, 0x07);

    delay(2000);

    display.stopscroll();

}

#include <SoftwareSerial.h>

SoftwareSerial mySerial(10, 11); // RX, TX

void setup(){

    Serial.begin(9600);

    mySerial.begin(9600);

}

void loop(){

    if (Serial.available()){

        mySerial.write(Serial.read());

    }

}

#include <SoftwareSerial.h>

SoftwareSerial mySerial(10, 11); // RX, TX

#include <Wire.h>

#include <SPI.h>

#include <Adafruit_GFX.h>

#include <Adafruit_SSD1306.h>

#define OLED_RESET 4

Adafruit_SSD1306 display(OLED_RESET);

#if (SSD1306_LCDHEIGHT != 64)

#error("Height incorrect, please fix Adafruit_SSD1306.h!");

#endif

int incomingByte = 0;

void setup(){

    //改成自己的 I²C 位址

    display.begin(SSD1306_SWITCHCAPVCC, 0x3C);

    display.clearDisplay();

    display.setTextSize(2);

    display.setTextColor(WHITE);

    display.setCursor(0,0);

    display.println("Waiting Uno Speaking... ");

    display.display();

    Serial.begin(9600);

    mySerial.begin(9600);

}

void loop() {

    if (mySerial.available()){

        display.clearDisplay();

        display.setCursor(0,0);

        display.setTextSize(2);

        display.setTextColor(WHITE);

        display.println("Uno speak");

        display.println(readLine());

        display.display();

    }

}

String readLine(){

    String s =  "";

    char c;

    while((c = mySerial.read()) !='\n'){

        s += c;

    }

    return s;

}