my commit

7SEG/2 7SEG/2_con_7SEG/2_con_7SEG.ino

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+/*
+shiftOut ra 1 Module LED 7 đoạn đơn
+*/
+//chân ST_CP của 74HC595
+int latchPin = 8;
+//chân SH_CP của 74HC595
+int clockPin = 12;
+//Chân DS của 74HC595
+int dataPin = 11;
+
+// Ta sẽ xây dựng mảng hằng số với các giá trị cho trước
+// Các bit được đánh số thứ tự (0-7) từ phải qua trái (tương ứng với A-F,DP)
+// Vì ta dùng LED 7 đoạn chung cực dương nên với các bit 0
+// thì các đoạn của LED 7 đoạn sẽ sáng
+// với các bit 1 thì đoạn ấy sẽ tắt
+
+//mảng có 10 số (từ 0-9) và 
+const byte Seg[10] = {
+  0b11000000,//0 - các thanh từ a-f sáng
+  0b11111001,//1 - chỉ có 2 thanh b,c sáng
+  0b10100100,//2
+  0b10110000,//3
+  0b10011001,//4
+  0b10010010,//5
+  0b10000010,//6
+  0b11111000,//7
+  0b10000000,//8
+  0b10010000,//9
+};
+
+
+void setup() {
+  //Bạn BUỘC PHẢI pinMode các chân này là OUTPUT
+  pinMode(latchPin, OUTPUT);
+  pinMode(clockPin, OUTPUT);
+  pinMode(dataPin, OUTPUT);
+}
+
+void HienThiLED7doan(unsigned long Giatri, byte SoLed = 2) {
+
+  byte *array = new byte[SoLed];
+  for (byte i = 0; i < SoLed; i++) {
+    //Lấy các chữ số từ phải quá trái
+    array[i] = (byte)(Giatri % 10UL);
+    Giatri = (unsigned long)(Giatri /10UL);
+  }
+  digitalWrite(latchPin, LOW);
+  for (int i = 0; i < 2; i++)
+    shiftOut(dataPin, clockPin, MSBFIRST, Seg[array[i]]); 
+
+  digitalWrite(latchPin, HIGH);
+  free(array);
+}
+
+
+void loop() { 
+  static unsigned long point = 0;
+
+  HienThiLED7doan(point, 2);
+
+  point = (point + 1) % 100UL; // Vòng tuần hoàn từ 0--99
+  delay(500);//Đợi 0.5 s cho mỗi lần tăng số
+}

7SEG/3 7SEG/3_con_7SEG_down_count/3_con_7SEG_down_count.ino

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+//chân ST_CP của 74HC595
+int latchPin = 6;
+//chân SH_CP của 74HC595
+int clockPin = 7;
+//Chân DS của 74HC595
+int dataPin = 5;
+const byte Seg[10] = {
+  0b11000000,//0
+  0b11111001,//1
+  0b10100100,//2
+  0b10110000,//3
+  0b10011001,//4
+  0b10010010,//5
+  0b10000010,//6
+  0b11111000,//7
+  0b10000000,//8
+  0b10010000,//9
+};
+
+void setup() {
+  pinMode(latchPin, OUTPUT);
+  pinMode(clockPin, OUTPUT);
+  pinMode(dataPin, OUTPUT);
+}
+
+void SEG7display(unsigned long value, byte SEG7Count = 3) {
+
+  byte *array = new byte[SEG7Count];
+  for (byte i = 0; i < SEG7Count; i++) {
+    //Lấy các chữ số từ phải quá trái
+    array[i] = (byte)(value % 10UL);
+    value = (unsigned long)(value /10UL);
+  }
+  digitalWrite(latchPin, LOW);
+  for (int i = 0; i < SEG7Count; i++)
+    shiftOut(dataPin, clockPin, MSBFIRST, Seg[array[i]]); 
+
+  digitalWrite(latchPin, HIGH);
+  free(array);
+}
+
+
+void loop() { 
+  static unsigned long point = 999;  
+  SEG7display(point, 3);
+  point = (unsigned long)(point-1);
+  delay(50);
+}

7SEG/den giao thong/2_con_7SEG_random_so_giam_dan/2_con_7SEG_random_so_giam_dan.ino

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+//chân ST_CP của 74HC595
+int latchPin = 6;
+//chân SH_CP của 74HC595
+int clockPin = 7;
+//Chân DS của 74HC595
+int dataPin = 5;
+int RED_LED = 8, YELLOW_LED = 9, GREEN_LED =10;
+const byte Seg[10] = {
+  0b11000000,//0
+  0b11111001,//1
+  0b10100100,//2
+  0b10110000,//3
+  0b10011001,//4
+  0b10010010,//5
+  0b10000010,//6
+  0b11111000,//7
+  0b10000000,//8
+  0b10010000,//9
+};
+
+void setup() {
+  pinMode(latchPin, OUTPUT);
+  pinMode(clockPin, OUTPUT);
+  pinMode(dataPin, OUTPUT);
+  pinMode(8,OUTPUT);
+  pinMode(9,OUTPUT);
+  pinMode(10,OUTPUT);
+  randomSeed(analogRead(A0));
+  Serial.begin(9600);
+}
+
+void SEG7display(unsigned long value, byte SEG7Count = 2) {
+
+  byte *array = new byte[SEG7Count];
+  for (byte i = 0; i < SEG7Count; i++) {
+    //Lấy các chữ số từ phải quá trái
+    array[i] = (byte)(value % 10UL);
+    value = (unsigned long)(value /10UL);
+  }
+  digitalWrite(latchPin, LOW);
+  for (int i = 0; i < SEG7Count; i++)
+    shiftOut(dataPin, clockPin, MSBFIRST, Seg[array[i]]); 
+
+  digitalWrite(latchPin, HIGH);
+  free(array);
+}
+
+
+void loop() { 
+  static long point;
+
+  point = random(20,90);
+  do{
+  digitalWrite(RED_LED,HIGH);
+  SEG7display(point, 2);
+  point = (long)(point-1);
+  delay(1000);
+  } while (point >=0);
+  delay(100);
+  digitalWrite(RED_LED,LOW);
+  delay(100);
+
+  point = random(20,90);
+  do{
+  digitalWrite(GREEN_LED,HIGH);
+  SEG7display(point, 2);
+  point = (long)(point-1);
+  delay(1000);
+  } while (point >=0);
+  delay(100);
+  digitalWrite(GREEN_LED,LOW);
+  delay(100);
+
+  point = 3;
+  do{
+  digitalWrite(YELLOW_LED,HIGH);
+  SEG7display(point, 2);
+  point = (long)(point-1);
+  delay(1000);
+  } while (point >=0);
+  delay(100);
+  digitalWrite(YELLOW_LED,LOW);
+  delay(100);  
+}

7SEG/one 7SEG/one_7SEG/one_7SEG.ino

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+int dataPin = 11,latchPin = 8, clockPin = 12;
+const int SEG[10]{
+  0b11000000, //0(g->a)
+  0b11111001,
+  0b10100100,
+  0b10110000,
+  0b10011001,
+  0b10010010,
+  0b10000010,
+  0b11111000,
+  0b10000000,
+  0b10010000
+};
+
+void setup() {
+  // put your setup code here, to run once:
+  pinMode(dataPin,OUTPUT);
+  pinMode(latchPin,OUTPUT);
+  pinMode(clockPin,OUTPUT);
+}
+
+void loop() {
+  // put your main code here, to run repeatedly:
+  for(int i = 0;i<10;i++){
+  digitalWrite(latchPin,LOW);
+  shiftOut(dataPin,clockPin,MSBFIRST,SEG[i]);
+  digitalWrite(latchPin,HIGH);
+  delay(1000);
+  }
+}

CD4x_I2C/CD4X/CD4X.ino

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+#include <Wire.h>
+#include "SparkFun_SCD4x_Arduino_Library.h" //Click here to get the library: http://librarymanager/All#SparkFun_SCD4x
+SCD4x mySensor;
+void setup()
+{
+  Serial.begin(115200);
+  Serial.println(F("SCD4x Example"));
+  Wire.begin();
+
+  //mySensor.enableDebugging(); // Uncomment this line to get helpful debug messages on Serial
+
+  //.begin will start periodic measurements for us (see the later examples for details on how to override this)
+  if (mySensor.begin() == false)
+  {
+    Serial.println(F("Sensor not detected. Please check wiring. Freezing..."));
+    while (1)
+      ;
+  }
+
+  //The SCD4x has data ready every five seconds
+}
+
+void loop()
+{
+  if (mySensor.readMeasurement()) // readMeasurement will return true when fresh data is available
+  {
+    Serial.println();
+
+    Serial.print(F("CO2(ppm):"));
+    Serial.print(mySensor.getCO2());
+
+    Serial.print(F("\tTemperature(C):"));
+    Serial.print(mySensor.getTemperature(), 1);
+
+    Serial.print(F("\tHumidity(%RH):"));
+    Serial.print(mySensor.getHumidity(), 1);
+
+    Serial.println();
+  }
+  else
+    Serial.print(F("."));
+
+  delay(500);
+}

Change_RES/Change_RES.ino

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+void setup(){
+  Serial.begin(9600);
+}
+
+void loop(){
+  int bientro = analogRead(A0);
+  Serial.println(bientro);
+  int voltage;
+  voltage = map(bientro,0,1023,0,5000);
+  Serial.println(voltage);
+  Serial.println();
+  delay(200);
+}

Change_RES/Change_RES_led/Change_RES_led/Change_RES_led.ino

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+byte ledPin[] = {8,9,10};
+void setup() {
+  // put your setup code here, to run once:
+  for(int i =0; i< sizeof(ledPin);i++){
+    pinMode(ledPin[i],OUTPUT);
+    digitalWrite(ledPin[i],LOW);
+  }
+  Serial.begin(9600);
+}
+
+void loop() {
+  // put your main code here, to run repeatedly:
+  int changeRes = analogRead(A0);
+  Serial.println(changeRes);
+  int voltage = map(changeRes,0,1023,0,5000);
+  Serial.println(voltage);
+  Serial.println();
+  if(changeRes >0 && changeRes <=341){
+    digitalWrite(8,HIGH);
+    digitalWrite(9,LOW);
+    digitalWrite(10,LOW);
+  }
+  if(changeRes >341 && changeRes <=682){
+    digitalWrite(8,LOW);
+    digitalWrite(9,HIGH);
+    digitalWrite(10,LOW);
+  }
+  if(changeRes >682 && changeRes <=1023){
+    digitalWrite(8,LOW);
+    digitalWrite(9,LOW);
+    digitalWrite(10,HIGH);
+  }
+}

ESO32_Firebase_DHT11/ESO32_Firebase_DHT11.ino

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+#include <FirebaseESP32.h>
+#include  <WiFi.h>
+#include "DHT.h"
+
+#define FIREBASE_HOST "esp32-smart-plant-default-rtdb.firebaseio.com/"
+#define WIFI_SSID "HOANG DAT" // Change the name of your WIFI
+#define WIFI_PASSWORD "24072002" // Change the password of your WIFI
+#define FIREBASE_Authorization_key "akdXuIccUekQm4AdH1c9ToAm5v25MoFahWmQh3ys"
+
+#define DHTPIN 4    
+
+#define DHTTYPE DHT11   
+DHT dht(DHTPIN, DHTTYPE);
+
+FirebaseData firebaseData;
+FirebaseJson json;
+
+void setup() {
+
+ Serial.begin(115200);
+  dht.begin();
+   WiFi.begin (WIFI_SSID, WIFI_PASSWORD);
+   Serial.print("Connecting...");
+  while (WiFi.status() != WL_CONNECTED)
+  {
+    Serial.print(".");
+    delay(300);
+  }
+  Serial.println();
+  Serial.print("IP Address: ");
+  Serial.println(WiFi.localIP());
+  Serial.println();
+  Firebase.begin(FIREBASE_HOST,FIREBASE_Authorization_key);
+
+}
+
+void loop() {
+
+  float hum = dht.readHumidity();
+  float temp = dht.readTemperature();  
+
+   if (isnan(hum) || isnan(temp)  ){
+    Serial.println(F("Failed to read from DHT sensor!"));
+    return;
+  }
+
+  Serial.print("Temperature: ");
+  Serial.print(temp);
+  Serial.print("°C");
+  Serial.print(" Humidity: ");
+  Serial.print(hum);
+  Serial.print("%");
+  Serial.println();
+
+  Firebase.setFloat(firebaseData, "/ESP32_APP/TEMPERATURE", temp);
+  Firebase.setFloat(firebaseData, "/ESP32_APP/HUMIDITY", hum);
+   delay(200);
+}