各位有理解loop中很長的咒語嗎?不懂得可以多看幾次，不要氣餒，文章不會跑走，所以繼續加油吧~那今天就不廢話那麼多呢，今天如標題一樣要介紹STA mode，我相信如果看過Relay AP與LED AP的程式碼，應該就不難猜到Relay STA也是相同情況，只能跟你們這群優秀得各位說，一點都猜得沒錯，但在下一篇結束後，會進入讀取數值的應用，各位可以期待一下~
和STA AP接線相同
圖片取自：使用者拍攝
#include <WiFi.h>
// Replace with your network credentials
const char* ssid = "xxxx"; //AP分享器SSID
const char* password = "xxxxxxxx"; //AP分享器密碼
WiFiServer server(80);
// Variable to store the HTTP request
String header;
// Auxiliar variables to store the current output state
String output22State = "off";
String output23State = "off";
// Assign output variables to GPIO pins
const int output22 = 22;
const int output23 = 23;
// Current time
unsigned long currentTime = millis();
// Previous time
unsigned long previousTime = 0;
// Define timeout time in milliseconds (example: 2000ms = 2s)
const long timeoutTime = 2000;
void setup() {
Serial.begin(115200);
// Initialize the output variables as outputs
pinMode(output22, OUTPUT);
pinMode(output23, OUTPUT);
// Set outputs to LOW
digitalWrite(output22, LOW);
digitalWrite(output23, LOW);
// Connect to Wi-Fi network with SSID and password
Serial.print("Connecting to ");
Serial.println(ssid);
WiFi.begin(ssid, password);
while (WiFi.status() != WL_CONNECTED) {
delay(500);
Serial.print(".");
}
// Print local IP address and start web server
Serial.println("");
Serial.println("WiFi connected.");
Serial.println("IP address: ");
Serial.println(WiFi.localIP());
server.begin();
}
void loop(){
WiFiClient client = server.available(); // Listen for incoming clients
if (client) { // If a new client connects,
Serial.println("New Client."); // print a message out in the serial port
String currentLine = ""; // make a String to hold incoming data from the client
currentTime = millis();
previousTime = currentTime;
while (client.connected() && currentTime - previousTime <= timeoutTime) { // loop while the client's connected
currentTime = millis();
if (client.available()) { // if there's bytes to read from the client,
char c = client.read(); // read a byte, then
Serial.write(c); // print it out the serial monitor
header += c;
if (c == '\n') { // if the byte is a newline character
// if the current line is blank, you got two newline characters in a row.
// that's the end of the client HTTP request, so send a response:
if (currentLine.length() == 0) {
// HTTP headers always start with a response code (e.g. HTTP/1.1 200 OK)
// and a content-type so the client knows what's coming, then a blank line:
client.println("HTTP/1.1 200 OK");
client.println("Content-type:text/html");
client.println("Connection: close");
client.println();
// turns the GPIOs on and off
if (header.indexOf("GET /22/on") >= 0) {
Serial.println("GPIO 22 on");
output22State = "on";
digitalWrite(output22, HIGH);
} else if (header.indexOf("GET /22/off") >= 0) {
Serial.println("GPIO 22 off");
output22State = "off";
digitalWrite(output22, LOW);
} else if (header.indexOf("GET /23/on") >= 0) {
Serial.println("GPIO 23 on");
output23State = "on";
digitalWrite(output23, HIGH);
} else if (header.indexOf("GET /23/off") >= 0) {
Serial.println("GPIO 23 off");
output23State = "off";
digitalWrite(output23, LOW);
}
// Display the HTML web page
client.println("<!DOCTYPE html><html>");
client.println("<head><meta name=\"viewport\" content=\"width=device-width, initial-scale=1\">");
client.println("<link rel=\"icon\" href=\"data:,\">");
// CSS to style the on/off buttons
// Feel free to change the background-color and font-size attributes to fit your preferences
client.println("<style>html { font-family: Helvetica; display: inline-block; margin: 0px auto; text-align: center;}");
client.println(".button { background-color: #195B6A; border: none; color: white; padding: 16px 40px;");
client.println("text-decoration: none; font-size: 30px; margin: 2px; cursor: pointer;}");
client.println(".button2 {background-color: #77878A;}</style></head>");
// Web Page Heading
client.println("<body><h1>ESP32 Web Server</h1>");
// Display current state, and ON/OFF buttons for GPIO 22
client.println("<p>GPIO 22 - State " + output22State + "</p>");
// If the output22State is off, it displays the ON button
if (output22State=="off") {
client.println("<p><a href=\"/22/on\"><button class=\"button\">ON</button></a></p>");
} else {
client.println("<p><a href=\"/22/off\"><button class=\"button button2\">OFF</button></a></p>");
}
// Display current state, and ON/OFF buttons for GPIO 23
client.println("<p>GPIO 23 - State " + output23State + "</p>");
// If the output23State is off, it displays the ON button
if (output23State=="off") {
client.println("<p><a href=\"/23/on\"><button class=\"button\">ON</button></a></p>");
} else {
client.println("<p><a href=\"/23/off\"><button class=\"button button2\">OFF</button></a></p>");
}
client.println("</body></html>");
// The HTTP response ends with another blank line
client.println();
// Break out of the while loop
break;
} else { // if you got a newline, then clear currentLine
currentLine = "";
}
} else if (c != '\r') { // if you got anything else but a carriage return character,
currentLine += c; // add it to the end of the currentLine
}
}
}
// Clear the header variable
header = "";
// Close the connection
client.stop();
Serial.println("Client disconnected.");
Serial.println("");
}
}
這邊一樣要記住ssid跟password要填寫正確，如果填寫錯誤Esp32s將會無法連結到AP(手機基地台或AP(WiFi)分享器)
利用手機或筆電等裝置，並打開WiFi連接至AP或手機基地台，後續打開瀏覽器並輸入Esp32s的IP(這邊需要透過Arduino中的監控視窗查看)
圖片取自：使用者拍攝
圖片取自：使用者拍攝
好了，不知不覺已經介紹完2個很常使用到的元件了，下一篇會講解html的基礎寫法，就不會有程式碼的介紹拉，因為都大概介紹完了，如果有不懂可以在下方留言區留言，如有看到就會幫你們解答疑問，那如開頭所講，下一篇結束後會開始進入感測器時代，並會透過那個感測器做出許多應用，那這邊就稍微賣點關東煮 (我就是想賣關東煮)，所以先不講是甚麼元件，那就明天見拉
iThome鐵人賽
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