---
title: 高英_物聯網實務課程
tags: C,arduino,物聯網實作課程
lang: zh
---
# 工商物聯網實務課程
###### tags: C#,Arduino,IoT
## 課堂重要分享網址
1. <a href="https://www.tinkercad.com/circuits">Arduion 模擬網址</a>
## 基礎練習-2021/03/08
### 練習一:利用三用電表測試Arduino輸出電壓
1. 利用標準電位量出5V
2. 利用電位差的概念量出1.7V
### 練習二:Arduino 與 LED
1. 常見錯誤接法
:::danger
LED 必須跨接電組，否則很容易燒毀
:::
2. 正確的接法
:::info
LED 的亮度取決於通過的電流，可使用電組來進行控制
:::
### 練習三:利用三用電表量測電路上的電壓與電流
:::info
量測電壓需使用並聯，量測電流需使用串聯
:::
### 練習四:分壓電路實作
1. 利用固定電阻實作分壓電路
2. 利用可變電阻實作分壓電路
### 練習五:正式進入Arduino - Hello World
在模擬軟體上練習如何顯示出Hello World
```c=
void setup()
{
Serial.begin(9600);
}
void loop()
{
Serial.println("Hello World");
delay(5000);
}
```
:::info
注意: loop 建議加上 delay 函數，避免程式執行太快。
:::
## 基礎練習-2021/03/15
### 練習一:利用程式控制LED燈亮燈
```c=
void setup()
{
Serial.begin(9600);
pinMode(2,OUTPUT);
}
void loop()
{
digitalWrite(2, HIGH);
delay(5000);
}
```
:::info
:bulb:課堂練習:如果希望 Digital 針腳為 LOW 才會亮燈，該如何設計?
:::
:::spoiler 參考接法
:::
### 練習二:利用程式控制LED燈閃燈
```c=
void setup()
{
Serial.begin(9600);
pinMode(2,OUTPUT);
}
void loop()
{
digitalWrite(2, LOW); //LED ON
delay(1000);
digitalWrite(2, HIGH); //LED OFF
delay(1000);
}
```
:::info
:book: 嘗試變更delay的時間，看會發生什麼有趣的事情。
:::
### 練習三:利用程式實作簡易紅綠燈控制系統
```c=
void setup()
{
Serial.begin(9600);
pinMode(2,OUTPUT);
pinMode(3,OUTPUT);
pinMode(4,OUTPUT);
}
void loop()
{
//亮紅燈，關黃燈
digitalWrite(3, LOW);
digitalWrite(2, HIGH);
delay(5000);
//亮綠燈，關紅燈
digitalWrite(2, LOW);
digitalWrite(4, HIGH);
delay(5000);
//亮黃燈，關綠燈
digitalWrite(4, LOW);
digitalWrite(3, HIGH);
delay(2000);
}
```
:::info
:ice_skate: 如何利用1顆電阻來達到相同的目的呢?
:::
### 練習四:共陰與共陽線路設計
#### 共陰線路
#### 共陽線路
:::spoiler 共陽線路參考程式碼
```c=
void setup()
{
Serial.begin(9600);
pinMode(2,OUTPUT);
pinMode(3,OUTPUT);
pinMode(4,OUTPUT);
digitalWrite(2, HIGH);
digitalWrite(3, HIGH);
digitalWrite(4, HIGH);
}
void loop()
{
//亮紅燈，關黃燈
digitalWrite(3, HIGH);
digitalWrite(2, LOW);
delay(5000);
//亮綠燈，關紅燈
digitalWrite(2, HIGH);
digitalWrite(4, LOW);
delay(5000);
//亮黃燈，關綠燈
digitalWrite(4, HIGH);
digitalWrite(3, LOW);
delay(2000);
}
```
:::
### 練習五:利用共陰/共陽實作RGB-LED燈
:::info
:balloon: 利用色彩的三原色可以自由變換各式各樣的顏色
:::
```c=
void setup()
{
pinMode(2, OUTPUT);
pinMode(3, OUTPUT);
pinMode(4, OUTPUT);
}
void loop()
{
digitalWrite(2, HIGH);
digitalWrite(3, HIGH);
}
```
:::info
:baby: 除了上述的顏色之外，是否可以變化出更多的色彩呢?
:::
## 基礎練習-2021/03/22
### 練習一:熟悉PWM訊號
:::success
:question: 目前熟悉的數位輸出都是5V，我該如何調整數位輸出的電壓值呢?
:::
#### 初探PWM訊號
為了改變輸出電壓值，我們嘗試的改變HIGH與LOW的時間，並在極短的時間內切換來達到模擬電壓值得效果
```c=
void setup()
{
pinMode(5, OUTPUT);
}
void loop()
{
digitalWrite(5, HIGH);
delay(4);
digitalWrite(5, LOW);
delay(1);
}
```
:::success
:couch_and_lamp: 利用delayMicroseconds()函數可以將訊號控制在微秒等級
:::
#### 利用時序來模擬PWM輸出
```c=
void setup()
{
pinMode(3, OUTPUT);
pinMode(5, OUTPUT);
Serial.begin(9600);
}
long time = micros();
void loop()
{
time = micros() % 5000;
if(time > 0 && time < 2000)
{
digitalWrite(3,HIGH);
}
if(time > 0 && time < 3000)
{
digitalWrite(5,HIGH);
}
if(time > 2000 && time < 5000)
{
digitalWrite(3,LOW);
}
if(time > 4000 && time < 5000)
{
digitalWrite(5,LOW);
}
}
```
#### 利用analogWrite來實現PWM輸出(建議使用)
```c=
void setup()
{
pinMode(3, OUTPUT);
pinMode(5, OUTPUT);
Serial.begin(9600);
}
void loop()
{
analogWrite(3,102);
analogWrite(5,205);
delay(10);
}
```
### 練習二:利用PWM訊號控制三色LED燈
```c=
void setup()
{
pinMode(3, OUTPUT); //R
pinMode(5, OUTPUT); //G
pinMode(6, OUTPUT); //B
pinMode(5, OUTPUT);
}
void loop()
{
analogWrite(3,58);
analogWrite(5,121);
analogWrite(6,166);
}
```
### 練習三:利用可變電阻控制三色LED
```c=
void setup()
{
pinMode(3, OUTPUT); //R
pinMode(5, OUTPUT); //G
pinMode(6, OUTPUT); //B
Serial.begin(9600);
}
void loop()
{
int R = analogRead(A5) / 4;
int G = analogRead(A4) / 4;
int B = analogRead(A3) / 4;
analogWrite(3,R);
analogWrite(5,G);
analogWrite(6,B);
delay(10);
}
```
## 基礎練習-2021/04/12
### 練習一:七段顯示器的應用-1
請利用接線的方式顯示數字9
### 練習二:七段顯示器的應用-2
利用程式控制七段顯示器
```c=
int A = 4;
int B = 5;
int C = 7;
int D = 8;
int E = 9;
int F = 3;
int G = 2;
int DP = 6;
void setup()
{
pinMode(2, OUTPUT);
pinMode(3, OUTPUT);
pinMode(4, OUTPUT);
pinMode(5, OUTPUT);
pinMode(6, OUTPUT);
pinMode(7, OUTPUT);
pinMode(8, OUTPUT);
pinMode(9, OUTPUT);
}
void loop()
{
digitalWrite(A, HIGH);
digitalWrite(C, HIGH);
digitalWrite(D, HIGH);
digitalWrite(E, HIGH);
digitalWrite(F, HIGH);
digitalWrite(G, HIGH);
delay(500);
}
```
## 基礎練習-2021/04/19
### 練習一:七段顯示器的應用-3
利用迴圈顯示七段顯示器
```c=
//宣告七段顯示器的角位
int a = 4;
int b = 5;
int c = 7;
int d = 8;
int e = 9;
int f = 3;
int g = 2;
int dp = 6;
//宣告七段顯示器亮燈角位
int N0[] = {a,b,c,d,e,f};
int N1[] = {b,c};
int N2[] = {a,b,g,e,d};
int N3[] = {a,b,g,c,d};
int N4[] = {f,g,b,c};
int N5[] = {a,f,g,c,d};
int N6[] = {a,f,e,d,c,g};
int N7[] = {a,b,c};
int N8[] = {a,b,c,d,e,f,g};
int N9[] = {a,f,g,b,c,d};
//輸出函數
void showNumber(int num[],int arrayLength)
{
for(int i=2;i<=9;i++)
{
digitalWrite(i, LOW);
}
for(int i=0;i<arrayLength;i++)
{
digitalWrite(num[i], HIGH);
}
}
void setup()
{
for(int i=2;i<=11;i++)
{
pinMode(i, OUTPUT);
}
}
void loop()
{
digitalWrite(10, HIGH);
digitalWrite(11, LOW);
showNumber(N9,sizeof(N9)/sizeof(int));
delay(50);
digitalWrite(10, LOW);
digitalWrite(11, HIGH);
showNumber(N8,sizeof(N8)/sizeof(int));
delay(50);
}
```
### 練習二:74HC595
```c=
const int DS = 11;
const int STCP = 12;
const int SHCP = 13;
byte N0 = B01000100;//68
byte N1 = B01011111;//95
byte N2 = B01100010;//98
byte N3 = B01001010;//74
byte N4 = B01011001;//89
byte N5 = B11001000;//200
byte N6 = B11000000;//192
byte N7 = B01011110;//94
byte N8 = B01000000;//64
byte N9 = B01001000;//72
void setup()
{
pinMode(DS, OUTPUT);
pinMode(STCP, OUTPUT);
pinMode(SHCP, OUTPUT);
}
void loop()
{
digitalWrite(STCP,LOW);
shiftOut(DS,SHCP,LSBFIRST,N0);
digitalWrite(STCP,HIGH);
delay(1000);
}
```
## 基礎練習-2021/04/26
### 練習一:七段顯示器的應用-4
```c=
const int DS = 11;
const int STCP = 12;
const int SHCP = 13;
byte N0 = B01000100;//68
byte N1 = B01011111;//95
byte N2 = B01100010;//98
byte N3 = B01001010;//74
byte N4 = B01011001;//89
byte N5 = B11001000;//200
byte N6 = B11000000;//192
byte N7 = B01011110;//94
byte N8 = B01000000;//64
byte N9 = B01001000;//72
byte array[] = {N0,N1,N2,N3,N4,N5,N6,N7,N8,N9};
void setup()
{
Serial.begin(9600);
pinMode(DS, OUTPUT);
pinMode(STCP, OUTPUT);
pinMode(SHCP, OUTPUT);
}
void loop()
{
for(int i=0;i<=20000;i++)
{
digitalWrite(STCP,LOW);
Serial.println(i/10);
digitalWrite(STCP,LOW);
shiftOut(DS,SHCP,LSBFIRST,array[i%10/1]);
shiftOut(DS,SHCP,LSBFIRST,array[(i%100)/10]);
shiftOut(DS,SHCP,LSBFIRST,array[(i%1000)/100]);
shiftOut(DS,SHCP,LSBFIRST,array[(i%10000)/1000]);
digitalWrite(STCP,HIGH);
digitalWrite(STCP,HIGH);
delay(500);
}
}
```
## 基礎練習-2021/05/10
### 練習一:LCD
```c=
#include <LiquidCrystal.h>
LiquidCrystal lcd(12, 11, 2, 3, 4, 5);
void setup() {
Serial.begin(9600);
lcd.begin(16, 2);
lcd.setCursor(0, 0);
lcd.print("Hello World");
}
int t = 0;
void loop() {
lcd.setCursor(0, 1);
lcd.print("Time:");
lcd.setCursor(5, 1);
lcd.print(t);
t = t + 1;
delay(1000);
}
```
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