ARDUINO IOT EXPERIMENTS

IO Port Configuration (Embedded Software and Hardware Architecture)

• Port Direction Register sets pin to:
  • 0: an input
  • 1: an output
• rw-O: Bit is Read/Write & defaults to 0

• Port Output Register sets output to:
  • 0: Output set to LOW (GND)
  • 1: Output set to HIGH (VCC)

#include <stdint.h>
#include "msp.h"

// MSP432 microcontroller
#define LENGHT1 (100000)
#define LENGTH2 (10000)
#define P1_OUT_REG (0x40004C02)
#define P1_DIR_REG (0x40004C04)
#define BIT0 (0x01)

void main(void)
{
  uint32_t i;
  uint8_t * p1_out = (uint8_t*)0x40004c02; /* pointer to port 1 output register */
  uint8_t * p1_dir = (uint8_t*)P1_DIR_REG; /* pointer to port 1 direction register */

  /* Stop watchdog timer */
  WDTCTL = WDTPW | WDTHOLD;

  /* Sturcture overlay: Configure P1.0 as output */
  // P1 -> DIR |= 0x01;
  /* Direct Dereference: Configure P1.0 as output */
  *p1_dir |= BIT0;
  while(1)
  {
    /* Direct Dereference: Set P1.0 HIGH */
    // P1 -> OUT |= BIT0;

    /* Structure Overlay: Toggle P1.0 */
    // P1 -> OUT ^= 0x01;
    /* Direct Dereference: Toggle P1.0 */
    *p1_out ^= BIT0;

    for (i = LENGHT1; i>0; i--); /* Delay */
  }
}

Special ports

• VIN 端口：VIN 是 input voltage 的缩写，表示有外部电源时的输入端口。
• AREF:Reference voltage for the analog inputs(模拟输入的基准电压）。使用 analogReference()命令调用。
• ICSP：也有称为 ISP（In System Programmer)，就是一种线上即时烧录，目前比较新的芯片都支持这种烧录模式，包括大家常听说的 8051 系列的芯片，也都慢慢采用这种简便的烧录方式。我们都知道传统的烧录方式，都是将被烧录的芯片，从线路板上拔起，有的焊死在线路板上的芯片，还得先把芯片焊接下来才能烧录。为了解决这种问题，发明了 ICSP 线上即时烧录方式。只需要准备一条 R232 线（连接烧录器），以及一条连接烧录器与烧录芯片针脚的连接线就可以。电源的+5V，GND，两条负责传输烧录信息的针脚，再加上一个烧录电压针脚，这样就可以烧录了。

Sensor Experiments

• Analog Temperature Sensor
• Analog read serail
• Blink
• Dual-color LED
• Relay Module
• Button
• Buzzer
• Buzzer Passive
• Inclination
• Sound
• Fun with motor
• Step motor
• Infrared Receiver
• Vibration Switch
• Laser
• LCD 1602A I2C
• HC SR04
• Reliable transmission
• ESP 32
• RFID
• DS18B20 Temperature Sensor
• DHT11 Humidity
• BMP180 Barometer
• Water level
• DS1302

car experiments

• Advance
• Start
• Move
• Colorful move
• Tracking
• Tracking Ultrasonic
• Infrared Avoid
• Ultrasonic Avoid
• Infrared Remote
• Remote Control

iot experiments

• Humidity & Temperature

type

• boolean
• char
• byte
• int
• unsigned int
• long
• unsigned long
• float
• double
• string
• array
• void

constants

• HIGHT

  LOW (Digital IO Voltage)

• INPUT

  OUTPUT (Digital IO Direction)

• true

  false

functions

• Digital IO

  • pinMode(pin, mode) Digital INPUT/OUTPUT, pin = 0~13, mode = INPUT

    OUTPUT

  • digitalWrite(pin, value) pin = 0~13, value = HIGH

    LOW

  • int digitalRead(pin) pin = 0~13
• Analog IO
  • int analogRead(pin) Analog IO, pin = 0~5
  • analogWrite(pin, value) - PWM IO, pin = 3,6,9,10,11 value=0~255 改变 PWM 脚位的输出电压值, analogWrite(9,128); // 输出电压约 2.5 伏特
• Extended IO
  • shiftOut(dataPin, clockPin, bitOrder, value) SPI 外部 IO 扩展函数，通常使用带 SPI 接口的 74HC595 做 8 个 IO 扩展，dataPin 为数据口，clockPin 为时钟口，bitOrder 为数据传输方向（MSBFIRST 高位在前，LSBFIRST 低位在前），value 表示所要传送的数据（0 ～ 255），另外还需要一个 IO 口做 74HC595 的使能控制。
  • unsigned long pulseIn(pin, value)    脉冲长度记录函数，返回时间参数（us），pin 表示为 0 ～ 13，value 为 HIGH 或 LOW。比如 value 为 HIGH，那么当 pin 输入为高电平时，开始计时，当 pin 输入为低电平时，停止计时，然后返回该时间。
• Time
  • unsigned long millis()   返回时间函数（单位 ms），该函数是指，当程序运行就开始计时并返回记录的参数，该参数溢出大概需要 50 天时间。
  • delay(ms)
  • delayMicroseconds(us)
• Math
  • min(x,y)
  • max(x,y)
  • abs(x)
  • constrain(x, a, b)
  • map(value, fromLow, fromHigh, toLow, toHigh)
  • pow(base, exponent)
  • sq(x)
  • sqrt(x)
  • sin(rad)
  • cos(rad)
  • tan(rad)
• Random
  • randomSeed(seed)   随机数端口定义函数，seed 表示读模拟口analogRead(pin)函数
  • long random(max)   随机数函数，返回数据大于等于 0，小于 max
  • long random(min, max)   随机数函数，返回数据大于等于 min，小于 max
• Interrupts
  • attachInterrupt(interrupt, , mode)     外部中断只能用到数字 IO 口 2 和 3，interrupt 表示中断口初始 0 或 1，表示一个功能函数，mode：LOW 低电平中断，CHANGE 有变化就中断，RISING 上升沿中断，FALLING  下降沿中断。
  • detachInterrupt(interrupt)    中断开关，interrupt=1 开，interrupt=0 关。
  • interrupts() 使能中断
  • noInterrupts() 禁止中断
• Serial
  • Serial.begin(speed) 串口定义波特率函数，speed 表示波特率，如 9600，19200 等。
  • int Serial.available() 判断缓冲器状态。
  • int Serial.read()   读串口并返回收到参数。
  • Serial.flush()    清空缓冲器。
  • Serial.print(data) 串口输出数据。
  • Serial.println(data)   串口输出数据并带回车符。

main

/**
put your setup code here, to run once, to init
 */
void setup() {}

/**
put your main code here, to run repeatedly:
 */
void loop() {}

macos arduino IDE library path

/Users/<username>/Library/Arduino15/libraries

Platform arduino:avr@1.8.6 already installed
Already installed LiquidCrystal@1.0.7
Already installed Mouse@1.0.1
Already installed Arduino_BuiltIn@1.0.0
Already installed Ethernet@2.0.1
Already installed Stepper@1.1.3
Already installed Firmata@2.5.9
Already installed Keyboard@1.0.4
Downloading Servo@1.1.8
Servo@1.1.8
Installing Servo@1.1.8
Installed Servo@1.1.8
Downloading SD@1.2.4
SD@1.2.4
Installing SD@1.2.4
Installed SD@1.2.4
Downloading TFT@1.0.6
TFT@1.0.6
Installing TFT@1.0.6
Installed TFT@1.0.6

linux connection

ls -l /dev/ttyACM*
crw-rw---- 1 root dialout 188, 0 5 apr 23.01 ttyACM0
sudo usermod -a -G dialout <username>

Downloading packages
arduino:avr-gcc@7.3.0-atmel3.6.1-arduino7
arduino:avrdude@6.3.0-arduino17
arduino:arduinoOTA@1.3.0
arduino:avr@1.8.6
Installing arduino:avr-gcc@7.3.0-atmel3.6.1-arduino7
arduino:avr-gcc@7.3.0-atmel3.6.1-arduino7 installed
Installing arduino:avrdude@6.3.0-arduino17
arduino:avrdude@6.3.0-arduino17 installed
Installing arduino:arduinoOTA@1.3.0
arduino:arduinoOTA@1.3.0 installed
Installing platform arduino:avr@1.8.6
Configuring platform.
Platform arduino:avr@1.8.6 installed
Downloading Ethernet@2.0.1
Ethernet@2.0.1
Installing Ethernet@2.0.1
Installed Ethernet@2.0.1
Downloading Firmata@2.5.9
Firmata@2.5.9
Installing Firmata@2.5.9
Installed Firmata@2.5.9
Downloading Keyboard@1.0.4
Keyboard@1.0.4
Installing Keyboard@1.0.4
Installed Keyboard@1.0.4
Downloading LiquidCrystal@1.0.7
LiquidCrystal@1.0.7
Installing LiquidCrystal@1.0.7
Installed LiquidCrystal@1.0.7
Downloading Mouse@1.0.1
Mouse@1.0.1
Installing Mouse@1.0.1
Installed Mouse@1.0.1
Downloading Servo@1.1.8
Servo@1.1.8
Installing Servo@1.1.8
Installed Servo@1.1.8
Downloading Stepper@1.1.3
Stepper@1.1.3
Installing Stepper@1.1.3
Installed Stepper@1.1.3
Downloading Arduino_BuiltIn@1.0.0
Arduino_BuiltIn@1.0.0
Installing Arduino_BuiltIn@1.0.0
Installed Arduino_BuiltIn@1.0.0
Downloading SD@1.2.4
SD@1.2.4
Installing SD@1.2.4
Installed SD@1.2.4
Downloading TFT@1.0.6
TFT@1.0.6
Installing TFT@1.0.6
Installed TFT@1.0.6

Windows 11 connection

Downloading packages
arduino:avr-gcc@7.3.0-atmel3.6.1-arduino7
arduino:avrdude@6.3.0-arduino17
arduino:arduinoOTA@1.3.0
arduino:avr@1.8.6
Installing arduino:avr-gcc@7.3.0-atmel3.6.1-arduino7
Configuring tool.
arduino:avr-gcc@7.3.0-atmel3.6.1-arduino7 installed
Installing arduino:avrdude@6.3.0-arduino17
Configuring tool.
arduino:avrdude@6.3.0-arduino17 installed
Installing arduino:arduinoOTA@1.3.0
Configuring tool.
arduino:arduinoOTA@1.3.0 installed
Installing platform arduino:avr@1.8.6
Configuring platform.
Platform arduino:avr@1.8.6 installed
Downloading Arduino_BuiltIn@1.0.0
Arduino_BuiltIn@1.0.0
Installing Arduino_BuiltIn@1.0.0
Installed Arduino_BuiltIn@1.0.0
Downloading Ethernet@2.0.2
Ethernet@2.0.2
Installing Ethernet@2.0.2
Installed Ethernet@2.0.2
Downloading Mouse@1.0.1
Mouse@1.0.1
Installing Mouse@1.0.1
Installed Mouse@1.0.1
Downloading TFT@1.0.6
TFT@1.0.6
Installing TFT@1.0.6
Installed TFT@1.0.6
Downloading Keyboard@1.0.4
Keyboard@1.0.4
Installing Keyboard@1.0.4
Installed Keyboard@1.0.4
Downloading LiquidCrystal@1.0.7
LiquidCrystal@1.0.7
Installing LiquidCrystal@1.0.7
Installed LiquidCrystal@1.0.7
Downloading Stepper@1.1.3
Stepper@1.1.3
Installing Stepper@1.1.3
Installed Stepper@1.1.3
Downloading Firmata@2.5.9
Firmata@2.5.9
Installing Firmata@2.5.9
Installed Firmata@2.5.9
Downloading SD@1.2.4
SD@1.2.4
Installing SD@1.2.4
Installed SD@1.2.4
Downloading Servo@1.1.8
Servo@1.1.8
Installing Servo@1.1.8
Installed Servo@1.1.8