161 lines
4.5 KiB
C++
Executable File
161 lines
4.5 KiB
C++
Executable File
/*
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* Distance measurement with HC-SR04 ultrasonic sensor and Wemos D1 Mini, based a web server and Javasricpt
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* by author Irwan
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* published on www.likecircuit.com
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* version 2.0
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*/
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/*===================================================================================*/
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#include <ESP8266WiFi.h>
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#include <ESP8266WebServer.h>
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ESP8266WebServer server(80);
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const char* ssid="Livebox-37cc";
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const char* password= "8A6060920A8A86896F770F2C47";
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String webSite,javaScript,XML;
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// defines pins numbers trigger and echo
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const int trigPin = D2;
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const int echoPin = D3;
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// defines variables
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long duration;
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float distance;
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float Mdistance;
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void setup() {
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Serial.begin(9600);
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pinMode(trigPin, OUTPUT); // Sets the trigPin as an Output
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pinMode(echoPin, INPUT); // Sets the echoPin as an Input
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WiFi.begin(ssid,password);
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while(WiFi.status()!=WL_CONNECTED)delay(500);
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WiFi.mode(WIFI_STA);
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Serial.println("\n\nBOOTING ESP8266 ...");
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Serial.print("Connected to ");
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Serial.println(ssid);
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Serial.print("Station IP address: ");
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Serial.println(WiFi.localIP());
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server.on("/",handleWebsite);
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server.on("/xml",handleXML);
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server.begin();
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}
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void loop() {
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distanceData();
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delay(100);
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server.handleClient();
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}
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void distanceData(){
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digitalWrite(trigPin, LOW);
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delayMicroseconds(2);
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// Sets the trigPin on HIGH state for 10 micro seconds
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digitalWrite(trigPin, HIGH);
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delayMicroseconds(10);
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digitalWrite(trigPin, LOW);
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// Reads the echoPin, returns the sound wave travel time in microseconds
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duration = pulseIn(echoPin, HIGH);
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// Calculating the distance
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distance= (duration*0.034)/2;
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}
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void buildWebsite(){
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buildJavascript();
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webSite="<!DOCTYPE HTML>\n";
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webSite+=javaScript;
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webSite+="<BODY onload='process()'>\n";
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webSite+="<table style='width:70%'>\n";
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webSite+="<tr>\n";
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webSite+=" <th><h2>IOT Web Server Real-Time Measure Distance Sensor HC-SR04 and Wemos D1 Mini With Java Script</h2></th>\n";
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webSite+="</tr>\n";
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webSite+="<tr>\n";
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webSite+=" <td><center><h3>Distance Sensor = <A id='DistanceSensor'></A> Cm</h3></center></td>\n";
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webSite+="</tr>\n";
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webSite+="<tr>\n";
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webSite+=" <td>Routine : <A id='routineTime'></A></td>\n";
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webSite+="</tr>\n";
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webSite+="</table>\n";
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webSite+="</BODY>\n";
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webSite+="</HTML>\n";
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}
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void buildJavascript(){
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javaScript="<SCRIPT>\n";
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javaScript+="var xmlHttp=createXmlHttpObject();\n";
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javaScript+="function createXmlHttpObject(){\n";
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javaScript+=" if(window.XMLHttpRequest){\n";
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javaScript+=" xmlHttp=new XMLHttpRequest();\n";
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javaScript+=" }else{\n";
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javaScript+=" xmlHttp=new ActiveXObject('Microsoft.XMLHTTP');\n";
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javaScript+=" }\n";
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javaScript+=" return xmlHttp;\n";
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javaScript+="}\n";
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javaScript+="function process(){\n";
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javaScript+=" if(xmlHttp.readyState==0 || xmlHttp.readyState==4){\n";
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javaScript+=" xmlHttp.open('PUT','xml',true);\n";
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javaScript+=" xmlHttp.onreadystatechange=handleServerResponse;\n"; // no brackets?????
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javaScript+=" xmlHttp.send(null);\n";
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javaScript+=" }\n";
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javaScript+=" setTimeout('process()',500);\n";
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javaScript+="}\n";
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javaScript+="function handleServerResponse(){\n";
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javaScript+=" if(xmlHttp.readyState==4 && xmlHttp.status==200){\n";
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javaScript+=" xmlResponse=xmlHttp.responseXML;\n";
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javaScript+=" xmldoc = xmlResponse.getElementsByTagName('response');\n";
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javaScript+=" message = xmldoc[0].firstChild.nodeValue;\n";
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javaScript+=" document.getElementById('routineTime').innerHTML=message;\n";
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javaScript+=" xmldoc = xmlResponse.getElementsByTagName('responseDistanceSensor');\n";
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javaScript+=" message = xmldoc[0].firstChild.nodeValue;\n";
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javaScript+=" document.getElementById('DistanceSensor').innerHTML=message;\n";
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javaScript+=" }\n";
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javaScript+="}\n";
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javaScript+="</SCRIPT>\n";
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}
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void buildXML(){
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XML="<?xml version='1.0'?>";
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XML+="<Donnees>";
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XML+="<response>";
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XML+=millis2time();
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XML+="</response>";
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XML+="<responseDistanceSensor>";
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XML+=distance;
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XML+="</responseDistanceSensor>";
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XML+="</Donnees>";
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}
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String millis2time(){
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String Time="";
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unsigned long ss;
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byte mm,hh;
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ss=millis()/1000;
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hh=ss/3600;
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mm=(ss-hh*3600)/60;
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ss=(ss-hh*3600)-mm*60;
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if(hh<10)Time+="0";
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Time+=(String)hh+":";
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if(mm<10)Time+="0";
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Time+=(String)mm+":";
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if(ss<10)Time+="0";
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Time+=(String)ss;
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return Time;
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}
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void handleWebsite(){
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buildWebsite();
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server.send(200,"text/html",webSite);
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}
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void handleXML(){
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buildXML();
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server.send(200,"text/xml",XML);
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}
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