IOT learning journey - initial

and go Say goodbye for a while , Start the learning of SCM .
In the school curriculum , Learned the knowledge of SCM .
To realize computer and NodoMCU interconnection , Download... First arduino.exe, Download the corresponding development board and driver .
One did 40 Examples of simulation and real experiments . Choose a few at random to show the results .
One 、 stay arduino.exe Run some basic C The language code .( stay arduino.exe Run code , The premise must be with nodemcu Successful connection , Choose a good serial port and nodmcu Connect , To operate normally ）

void setup() {
    
 pinMode(2,output);
 pinMode(3,output);
 pinMode(4,output);
 pinMode(5,output);
 pinMode(6,output);
 pinMode(7,output);
 pinMode(8,output);
}
void loop() {
    
  // put your main code here, to run repeatedly:
  for (int i=2;i<=9;i++){
    
    digitalWrite(i,HIGH);
    delay(600);
  }
  for(int i=2;i<9;i++){
    
    digitalWrite(i,LOW);
    delay(600);
  }
  delay(1000);
}

Effect screenshots ：

Although there is no code to light up ,arduino The code on ran successfully ,nodmcu Still on .

Two 、

String myWelcomeString = "KM Shibly Reza";
String myStartString = "Let's GO GO GO";
String Combine = myWelcomeString + "\n" + myStartString;
void setup() {
    
Serial.begin(9600);
delay(4800);
Serial.println(Combine);
}
void loop() {
    
}

Run a screenshot ：

stay tinkercad Upper analog circuit ：
Code ：

const int buttonPin = 2;
const int ledPin = 13; 
int buttonState = 0; 
void setup() {
     
    pinMode(ledPin, OUTPUT);
    pinMode(buttonPin, INPUT);
}

void loop() {
     
    buttonState = digitalRead(buttonPin);
    if (buttonState == HIGH) {
    
        digitalWrite(ledPin, HIGH);
    } else {
    
        digitalWrite(ledPin, LOW);
    }
}

Screenshot ：
After program running , Click the button in the figure ,LED It will light up .
3、 ... and 、

#include<LiquidCrystal.h>
LiquidCrystal Icd=LiquidCrystal(2,3,4,5,6,7);
void setup(){
    
  Icd.begin(16,2);
}
void loop(){
    
  Icd.setCursor(2,0);
  Icd.print("Hello World");
  Icd.setCursor(2,1);
  Icd.print("Lijiaming");
}