charlesrc019 · November 8, 2024 01:57
diff --git a/iot_web_stoplight.ino b/iot_web_stoplight.ino
 /*-------------------------------------------------------------
 * 
 *   .SYNOPSIS
 *   STOPLIGHT
 *   A simple, wifi-controlled stoplight.
 *   
 *   .NOTES
 *   Author: Charles Christensen
 *   
 -------------------------------------------------------------*/

 // Import libraries.
 #include <ESP8266WiFi.h>        // WifiMgr
 #include <DNSServer.h>          // WifiMgr
 #include <WiFiManager.h>        // WifiMgr
 #include <ESP8266WebServer.h>   // Webserver

 // Set global varibles.
 WiFiServer server(80);          // Webserver
 int light_r = 2;                // Stoplight
 int light_y = 0;                // Stoplight
 int light_g = 4;                // Stoplight
 int light_state = 0;            // Stoplight
 bool auto_mode = true;          // Stoplight
 unsigned long timer = 0;        // Stoplight

 // Function. Initialization.
 void setup() {

  // Enable serial port feedback.
  Serial.begin(115200);

  // WiFiManager initialization.
  WiFiManager wifiManager;
  wifiManager.autoConnect("arduino1");

  // Webserver initialization.
  server.begin();

  // Stoplight initialization.
  pinMode(light_r, OUTPUT);
  pinMode(light_y, OUTPUT);
  pinMode(light_g, OUTPUT);
 }

 // Function. Create timer value the specified number of millis in the future.
 int addMillis(int millisecs) {
  if ( (millis() + millisecs) > 4294967294 )
    return millisecs - (4294967294-millis());
  else
    return millisecs + millis();
 }

 // Function. Set stoplight to specified state.
 void setLight(int state) {

  // Turn all lights off.
  digitalWrite(light_r, LOW);
  digitalWrite(light_y, LOW);
  digitalWrite(light_g, LOW);

  // Turn on specified light.
  if (state == 0) {
    digitalWrite(light_r, HIGH);
  }
  else if (state == 1) {
    digitalWrite(light_y, HIGH);
  }
  else if (state == 2) {
    digitalWrite(light_g, HIGH);
  }

  // Save light state information.
  light_state = state;
  
 }

 // Function. Main. Infinte loop.
 void loop(){

  // Listen for incoming web clients.
  WiFiClient client = server.available();

  // Perform actions if a webclient is currently connected.
  if (client) {
    while (client.connected()) {

      // Collect request from client.
      String request = "";
      if (client.available()) {

        // Read request header, character by character.
        while (true) {
          char c = client.read();
          request += c;
          
          // Check for a new line, which means we have GET portion of request.
          if (c == '\n') {
              break;
          }
        }
    
        // Perform state adjustments by looking for GET parameters.
        if (request.indexOf("GET /auto") >= 0) {
            auto_mode = true;
        }
        else if (request.indexOf("GET /red") >= 0) {
            auto_mode = false;
            setLight(0);
        }
        else if (request.indexOf("GET /yellow") >= 0) {
            auto_mode = false;
            setLight(1);
        }
        else if (request.indexOf("GET /green") >= 0) {
            auto_mode = false;
            setLight(2);
        }

        // Send response to client.
        client.println("HTTP/1.1 200 OK");
        client.println("Content-type:text/html");
        client.println("Connection: close");
        client.println();
        char response[] = "<!DOCTYPE html>"
                            "<html>"
                            "<head>"
                            "  <title>Stoplight</title>"
                            "  <link rel='stylesheet' href='https://cdnjs.cloudflare.com/ajax/libs/uikit/3.2.0/css/uikit.min.css' />"
                            "</head>"
                            "<body>"
                            "  <div class='uk-container uk-margin-top'>"
                            "    <img class='uk-align-center' src='http://charlesrchristensen.com/storage/blog/graphics/post4_%20stoplight.png' />"
                            "    <a class='uk-button uk-button-default uk-align-center uk-width-1-4' href='/red'>Red</button></a>"
                            "    <a class='uk-button uk-button-default uk-align-center uk-width-1-4' href='/yellow'>Yellow</button></a>"
                            "    <a class='uk-button uk-button-default uk-align-center uk-width-1-4' href='/green'>Green</button></a>"
                            "    <a class='uk-button uk-button-primary uk-align-center uk-width-1-4' href='/auto'>Auto</button></a>"
                            "  </div>"
                            "</body>"
                            "</html>";
        client.println( response );
        client.println();
        break; 
      }
    }
    client.stop();
  }

  // Perform automatic state changes.
  if ( (auto_mode) && (millis() > timer) ) {
    if (light_state == 0) {
      setLight(2);
      timer = addMillis(2000);
    }
    else if (light_state == 1) {
      setLight(0);
      timer = addMillis(3000);
    }
    else if (light_state == 2) {
      setLight(1);
      timer = addMillis(1000);
    }
  }
 }
	/*-------------------------------------------------------------
	*
	* .SYNOPSIS
	* STOPLIGHT
	* A simple, wifi-controlled stoplight.
	*
	* .NOTES
	* Author: Charles Christensen
	*
	-------------------------------------------------------------*/

	// Import libraries.
	#include <ESP8266WiFi.h> // WifiMgr
	#include <DNSServer.h> // WifiMgr
	#include <WiFiManager.h> // WifiMgr
	#include <ESP8266WebServer.h> // Webserver

	// Set global varibles.
	WiFiServer server(80); // Webserver
	int light_r = 2; // Stoplight
	int light_y = 0; // Stoplight
	int light_g = 4; // Stoplight
	int light_state = 0; // Stoplight
	bool auto_mode = true; // Stoplight
	unsigned long timer = 0; // Stoplight

	// Function. Initialization.
	void setup() {

	// Enable serial port feedback.
	Serial.begin(115200);

	// WiFiManager initialization.
	WiFiManager wifiManager;
	wifiManager.autoConnect("arduino1");

	// Webserver initialization.
	server.begin();

	// Stoplight initialization.
	pinMode(light_r, OUTPUT);
	pinMode(light_y, OUTPUT);
	pinMode(light_g, OUTPUT);
	}

	// Function. Create timer value the specified number of millis in the future.
	int addMillis(int millisecs) {
	if ( (millis() + millisecs) > 4294967294 )
	return millisecs - (4294967294-millis());
	else
	return millisecs + millis();
	}

	// Function. Set stoplight to specified state.
	void setLight(int state) {

	// Turn all lights off.
	digitalWrite(light_r, LOW);
	digitalWrite(light_y, LOW);
	digitalWrite(light_g, LOW);

	// Turn on specified light.
	if (state == 0) {
	digitalWrite(light_r, HIGH);
	}
	else if (state == 1) {
	digitalWrite(light_y, HIGH);
	}
	else if (state == 2) {
	digitalWrite(light_g, HIGH);
	}

	// Save light state information.
	light_state = state;

	}

	// Function. Main. Infinte loop.
	void loop(){

	// Listen for incoming web clients.
	WiFiClient client = server.available();

	// Perform actions if a webclient is currently connected.
	if (client) {
	while (client.connected()) {

	// Collect request from client.
	String request = "";
	if (client.available()) {

	// Read request header, character by character.
	while (true) {
	char c = client.read();
	request += c;

	// Check for a new line, which means we have GET portion of request.
	if (c == '\n') {
	break;
	}
	}

	// Perform state adjustments by looking for GET parameters.
	if (request.indexOf("GET /auto") >= 0) {
	auto_mode = true;
	}
	else if (request.indexOf("GET /red") >= 0) {
	auto_mode = false;
	setLight(0);
	}
	else if (request.indexOf("GET /yellow") >= 0) {
	auto_mode = false;
	setLight(1);
	}
	else if (request.indexOf("GET /green") >= 0) {
	auto_mode = false;
	setLight(2);
	}

	// Send response to client.
	client.println("HTTP/1.1 200 OK");
	client.println("Content-type:text/html");
	client.println("Connection: close");
	client.println();
	char response[] = "<!DOCTYPE html>"
	"<html>"
	"<head>"
	" <title>Stoplight</title>"
	" <link rel='stylesheet' href='https://cdnjs.cloudflare.com/ajax/libs/uikit/3.2.0/css/uikit.min.css' />"
	"</head>"
	"<body>"
	" <div class='uk-container uk-margin-top'>"
	" <img class='uk-align-center' src='http://charlesrchristensen.com/storage/blog/graphics/post4_%20stoplight.png' />"
	" <a class='uk-button uk-button-default uk-align-center uk-width-1-4' href='/red'>Red</button></a>"
	" <a class='uk-button uk-button-default uk-align-center uk-width-1-4' href='/yellow'>Yellow</button></a>"
	" <a class='uk-button uk-button-default uk-align-center uk-width-1-4' href='/green'>Green</button></a>"
	" <a class='uk-button uk-button-primary uk-align-center uk-width-1-4' href='/auto'>Auto</button></a>"
	" </div>"
	"</body>"
	"</html>";
	client.println( response );
	client.println();
	break;
	}
	}
	client.stop();
	}

	// Perform automatic state changes.
	if ( (auto_mode) && (millis() > timer) ) {
	if (light_state == 0) {
	setLight(2);
	timer = addMillis(2000);
	}
	else if (light_state == 1) {
	setLight(0);
	timer = addMillis(3000);
	}
	else if (light_state == 2) {
	setLight(1);
	timer = addMillis(1000);
	}
	}
	}
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