ESP32

參考資料：

IOT with ESP32

ESP32 HTTP GET with Arduino IDE

Getting started with ESP32

ESP32 WiFi網路連線即時PM2.5顯示器

ESP32 Web Server 網路伺服器手機上網遙控兩個 LED

Arduino建立Web Server做一個HTML客製化網頁，讓Wifi用戶連入

ESP32 作為 Web Server

ESP32 Guide 2024 | Choosing and Using an ESP32 Board

『DOIT ESP32 DEVKIT V1 BOARD (WI-FI AND BLUETOOTH)』範例介紹01 (2022/01/20)

 2022-01-20  Jash.Liao Comments 0 Comment

『DOIT ESP32 DEVKIT V1 Board (Wi-Fi and Bluetooth)』範例介紹01 (2022/01/20)

資料來源: https://randomnerdtutorials.com/getting-started-with-esp32/

WiFiScan – 無線網路掃描 

    https://randomnerdtutorials.com/installing-the-esp32-board-in-arduino-ide-windows-instructions/

ESP32 Pinout – 腳位介紹

    https://randomnerdtutorials.com/esp32-pinout-reference-gpios/

ESP32 Inputs Outputs – 基本輸出入

    https://randomnerdtutorials.com/esp32-digital-inputs-outputs-arduino/

ESP32 PWM –

    https://randomnerdtutorials.com/esp32-pwm-arduino-ide/

ESP32 Analog Inputs –

    https://randomnerdtutorials.com/esp32-adc-analog-read-arduino-ide/

ESP32 Interrupts Timers –

    https://randomnerdtutorials.com/esp32-pir-motion-sensor-interrupts-timers/

ESP32 Deep Sleep –    

    https://randomnerdtutorials.com/esp32-deep-sleep-arduino-ide-wake-up-sources/

ESP32 Web Server – 連接區網WIFI後，建立網頁伺服器，提供內建簡單網頁控制燈號亮滅

    https://randomnerdtutorials.com/esp32-web-server-arduino-ide/

ESP32 LoRa

ESP32 BLE

ESP32 BLE Client-Server

ESP32 Bluetooth

ESP32 MQTT

ESP32 ESP-NOW

ESP32 Wi-Fi – 兩塊板子 一個當AP+Web Server，另一個當 Web Client 進行http 通訊

    https://randomnerdtutorials.com/esp32-client-server-wi-fi/

ESP32 WebSocket

ESP32 ESP-MESH

ESP32 Email

ESP32 Text Messages

ESP32 HTTP GET POST – 連接區網WIFI後，使用ESP32作為 Web Client 透過呼叫已知Web API 傳送對應資訊到Server上

    https://randomnerdtutorials.com/esp32-http-get-post-arduino/

HTTP GET Web APIs – 連接區網WIFI後，使用ESP32作為 Web Client 透過呼叫已知Web API 傳送對應資訊到Server上並取回對回傳值 (天氣 API)

    https://randomnerdtutorials.com/esp32-http-get-open-weather-map-thingspeak-arduino/

HTTP POST Web APIs –  連接區網WIFI後，使用ESP32作為 Web Client 透過呼叫已知Web API 傳送對應資訊到Server上並取回對回傳值 (IFTT API)

    https://randomnerdtutorials.com/esp32-http-post-ifttt-thingspeak-arduino/

Server-Sent Events –

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『WEMOS D1 R1 WIFI UNO』和『DOIT ESP32 DEVKIT V1 BOARD』(ARDUINO) 與 簡單 PHP HTTP GET通訊

 2022-01-21  Jash.Liao Comments 0 Comment

『WEMos D1 R1 WiFi UNO』和『DOIT ESP32 DEVKIT V1 BOARD』(Arduino) 與 簡單 PHP Http Get通訊

資料來源: https://randomnerdtutorials.com/esp32-http-get-post-arduino/

https://github.com/jash-git/IOT-Smart-Application-Design-Practice-Class-Project-2022

https://github.com/jash-git/Jash-good-idea-20220101-001/tree/main/Arduino_Base64_C_lib_Project/Arduino%E5%92%8CPHP%E9%80%9A%E8%A8%8A%E6%9C%83%E5%8B%95%E7%A8%8B%E5%BC%8F%E5%82%99%E4%BB%BD

『PHP』

<?php

$val = $_GET['string'];

$bf = fopen("test.txt","a+");

fwrite ($bf,$val."\r\n");

fclose($bf);

echo "get data=";

if(($val%2)==0)

{

echo 0;

}

else

{

echo 1;

}

?>

『WEMos D1 R1 WiFi UNO』

/*

 *  This sketch sends data via HTTP GET requests to data.sparkfun.com service.

 *

 *  You need to get streamId and privateKey at data.sparkfun.com and paste them

 *  below. Or just customize this script to talk to other HTTP servers.

 *

 */

#include <ESP8266WiFi.h>

const char* ssid     = "jash_TStar";

const char* password = "asd700502";

const char* host = "192.168.0.191";

const char* streamId   = "....................";

const char* privateKey = "....................";

int Blue=D4;//D4 有連接WIFI指示燈

int Green=D5;//D5 命令對應燈

int Red=D6;//D6 命令對應燈

void setup() {

  //---

  //設定燈號腳位工作模式

  pinMode(Blue, OUTPUT); 

  pinMode(Green, OUTPUT); 

  pinMode(Red, OUTPUT); 

  //---設定燈號腳位工作模式

  //---

  //等待取得網路IP時，設定三燈全亮

  digitalWrite(Blue, HIGH);

  digitalWrite(Green, HIGH);

  digitalWrite(Red, HIGH);

  //---等待取得網路IP時，設定三燈全亮

  Serial.begin(9600);

  delay(50);

  // We start by connecting to a WiFi network

  Serial.println();

  Serial.println();

  Serial.print("Connecting to ");

  Serial.println(ssid);

  WiFi.begin(ssid, password);

  while (WiFi.status() != WL_CONNECTED) {

    delay(50);

    Serial.print(".");

  }

  //---

  //取得網路IP時，所有燈熄滅

  digitalWrite(Blue, LOW);//digitalWrite(Blue, HIGH);

  digitalWrite(Green, LOW);

  digitalWrite(Red, LOW);

  //---取得網路IP時，所有燈熄滅

  Serial.println("");

  Serial.println("WiFi connected");  

  Serial.println("IP address: ");

  Serial.println(WiFi.localIP());

  delay(1000);

}

int value = 0;

void loop() {

  value=random(10,50);

  Serial.print("connecting to ");

  Serial.println(host);

  // Use WiFiClient class to create TCP connections

  WiFiClient client;

  const int httpPort = 8080;

  if (!client.connect(host, httpPort)) {

    Serial.println("connection failed");

    client.stop();

    digitalWrite(Blue, HIGH);

    return;

  }

  else

  {

    digitalWrite(Blue, LOW);

  }

  // We now create a URI for the request

  //String url = "/php_code/val.php";

  String url = "/jash_web/val2DB.php";

  url += "?string=";

  url += value;

  Serial.print("Requesting URL: ");

  Serial.println(url);

  // This will send the request to the server

  client.print(String("GET ") + url + " HTTP/1.1\r\n" +

               "Host: " + host + "\r\n" + 

               "Connection: close\r\n\r\n");

  unsigned long timeout = millis();

  while (client.available() == 0) 

  {

    if (millis() - timeout > 5000)

    {

      Serial.println(">>> Client Timeout(5sec)!");

      Serial.println("");

      client.stop();

      digitalWrite(Blue, HIGH);

      return;

    }

    else

    {

      digitalWrite(Blue, LOW);

    }

  }

  // Read all the lines of the reply from server and print them to Serial

  while(client.available())

  {

    String line = client.readStringUntil('\r');

    int index=line.indexOf("get data=");//搜尋資料列

    if(index!=-1)

    {

      digitalWrite(Blue, LOW);

      //----

      //過濾不需要資料

      int value=line.length();

      char Buf[100];

      line.toCharArray(Buf, 100);

      line="";      

      //Serial.println(value);

      for(int i=0;i<value;i++)

      {

        if((Buf[i]>=48)&&(Buf[i]<=57))//只留數字範圍

        {

          line+=Buf[i];

        }

      }

      //----過濾不需要資料

      switch(line.toInt())

      {

        case 0:

          Serial.println("Red on & Green off");

          digitalWrite(Red, HIGH);

          digitalWrite(Green,LOW);

          break;

        case 1:

          Serial.println("Red off & Green on");

          digitalWrite(Red, LOW);

          digitalWrite(Green,HIGH);          

          break;  

      }

      break;

    }   

  }

  client.stop();

  Serial.println("closing connection");

  Serial.println("");

  delay(1000);  

}

『DOIT ESP32 DEVKIT V1 BOARD』

/*

  Rui Santos

  Complete project details at Complete project details at https://RandomNerdTutorials.com/esp32-http-get-post-arduino/

  Permission is hereby granted, free of charge, to any person obtaining a copy

  of this software and associated documentation files.

  The above copyright notice and this permission notice shall be included in all

  copies or substantial portions of the Software.

*/

#include <WiFi.h>

#include <HTTPClient.h>

int value = 0;

const char* ssid = "jash_TStar";

const char* password = "asd700502";

//Your Domain name with URL path or IP address with path

String serverName = "http://192.168.0.191:8080/jash_web/val2DB.php";

//String serverName = "http://192.168.0.191:8080/php_code/val.php";

// the following variables are unsigned longs because the time, measured in

// milliseconds, will quickly become a bigger number than can be stored in an int.

unsigned long lastTime = 0;

// Timer set to 10 minutes (600000)

//unsigned long timerDelay = 600000;

// Set timer to 5 seconds (5000)

unsigned long timerDelay = 5000;

void setup() {

  Serial.begin(115200); 

  WiFi.begin(ssid, password);

  Serial.println("Connecting");

  while(WiFi.status() != WL_CONNECTED) {

    delay(500);

    Serial.print(".");

  }

  Serial.println("");

  Serial.print("Connected to WiFi network with IP Address: ");

  Serial.println(WiFi.localIP());

  Serial.println("Timer set to 5 seconds (timerDelay variable), it will take 5 seconds before publishing the first reading.");

}

void loop() {

  //Send an HTTP POST request every 10 minutes

  if ((millis() - lastTime) > timerDelay) {

    //Check WiFi connection status

    if(WiFi.status()== WL_CONNECTED){

      HTTPClient http;

  value=random(10,50);

  String serverPath = serverName;

  serverPath += "?string=";

  serverPath += value;

      // Your Domain name with URL path or IP address with path

      http.begin(serverPath.c_str());

      // Send HTTP GET request

      int httpResponseCode = http.GET();

      if (httpResponseCode>0) {

        //Serial.print("HTTP Response code: ");

        //Serial.println(httpResponseCode);

        String line = http.getString();

        Serial.println(line);

        int index=line.indexOf("get data=");//搜尋資料列

        if(index!=-1)

        {

          //----

          //過濾不需要資料

          int value=line.length();

          char Buf[100];

          line.toCharArray(Buf, 100);

          line="";      

          //Serial.println(value);

          for(int i=0;i<value;i++)

          {

            if((Buf[i]>=48)&&(Buf[i]<=57))//只留數字範圍

            {

              line+=Buf[i];

            }

          }

          //----過濾不需要資料

          switch(line.toInt())

          {

            case 0:

              Serial.println("Red on & Green off");

              //digitalWrite(Red, HIGH);

              //digitalWrite(Green,LOW);

              break;

            case 1:

              Serial.println("Red off & Green on");

              //digitalWrite(Red, LOW);

              //digitalWrite(Green,HIGH);          

            break;  

          }//switch

        }//if(index!=-1)      

      }//if (httpResponseCode>0)

      else {

        Serial.print("Error code: ");

        Serial.println(httpResponseCode);

      }

      // Free resources

      http.end();

    }

    else {

      Serial.println("WiFi Disconnected");

    }

    lastTime = millis();

  }

}