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165 lines
4.4 KiB
165 lines
4.4 KiB
3 years ago
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#include <Arduino.h>
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#include <ESP8266WiFi.h>
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#include <Hash.h>
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#include <ESPAsyncTCP.h>
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#include <ESPAsyncWebServer.h>
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#include <OneWire.h>
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#include <DallasTemperature.h>
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// Data wire is connected to GPIO 4
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#define ONE_WIRE_BUS 12
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// Setup a oneWire instance to communicate with any OneWire devices
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OneWire oneWire(ONE_WIRE_BUS);
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// Pass our oneWire reference to Dallas Temperature sensor
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DallasTemperature sensors(&oneWire);
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// Replace with your network credentials
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const char* ssid = "YOUR_SSID";
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const char* password = "YOUR_PASSWORD";
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// Create AsyncWebServer object on port 80
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AsyncWebServer server(80);
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String readDSTemperatureC() {
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// Call sensors.requestTemperatures() to issue a global temperature and Requests to all devices on the bus
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sensors.requestTemperatures();
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float tempC = sensors.getTempCByIndex(0);
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if(tempC == -127.00) {
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Serial.println("Failed to read from DS18B20 sensor");
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return "--";
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} else {
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Serial.print("Temperature Celsius: ");
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Serial.println(tempC);
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}
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return String(tempC);
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}
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String readDSTemperatureF() {
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// Call sensors.requestTemperatures() to issue a global temperature and Requests to all devices on the bus
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sensors.requestTemperatures();
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float tempF = sensors.getTempFByIndex(0);
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if(int(tempF) == -196){
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Serial.println("Failed to read from DS18B20 sensor");
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return "--";
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} else {
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Serial.print("Temperature Fahrenheit: ");
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Serial.println(tempF);
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}
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return String(tempF);
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}
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const char index_html[] PROGMEM = R"rawliteral(
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<!DOCTYPE HTML><html>
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<head>
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<meta name="viewport" content="width=device-width, initial-scale=1">
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<link rel="stylesheet" href="https://use.fontawesome.com/releases/v5.7.2/css/all.css" integrity="sha384-fnmOCqbTlWIlj8LyTjo7mOUStjsKC4pOpQbqyi7RrhN7udi9RwhKkMHpvLbHG9Sr" crossorigin="anonymous">
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<style>
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html {
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font-family: Arial;
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display: inline-block;
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margin: 0px auto;
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text-align: center;
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}
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h2 { font-size: 3.0rem; }
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p { font-size: 3.0rem; }
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.units { font-size: 1.2rem; }
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.ds-labels{
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font-size: 1.5rem;
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vertical-align:middle;
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padding-bottom: 15px;
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}
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</style>
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</head>
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<body>
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<h2>ESP DS18B20 Server</h2>
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<p>
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<i class="fas fa-thermometer-half" style="color:#059e8a;"></i>
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<span class="ds-labels">Temperature Celsius</span>
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<span id="temperaturec">%TEMPERATUREC%</span>
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<sup class="units">°C</sup>
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</p>
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<p>
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<i class="fas fa-thermometer-half" style="color:#059e8a;"></i>
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<span class="ds-labels">Temperature Fahrenheit</span>
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<span id="temperaturef">%TEMPERATUREF%</span>
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<sup class="units">°F</sup>
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</p>
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</body>
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<script>
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setInterval(function ( ) {
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var xhttp = new XMLHttpRequest();
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xhttp.onreadystatechange = function() {
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if (this.readyState == 4 && this.status == 200) {
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document.getElementById("temperaturec").innerHTML = this.responseText;
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}
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};
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xhttp.open("GET", "/temperaturec", true);
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xhttp.send();
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}, 10000) ;
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setInterval(function ( ) {
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var xhttp = new XMLHttpRequest();
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xhttp.onreadystatechange = function() {
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if (this.readyState == 4 && this.status == 200) {
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document.getElementById("temperaturef").innerHTML = this.responseText;
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}
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};
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xhttp.open("GET", "/temperaturef", true);
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xhttp.send();
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}, 10000) ;
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</script>
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</html>)rawliteral";
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// Replaces placeholder with DHT values
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String processor(const String& var){
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//Serial.println(var);
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if(var == "TEMPERATUREC"){
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return readDSTemperatureC();
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}
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else if(var == "TEMPERATUREF"){
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return readDSTemperatureF();
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}
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return String();
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}
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void setup(){
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// Serial port for debugging purposes
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Serial.begin(115200);
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Serial.println();
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// Start up the DS18B20 library
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sensors.begin();
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// Connect to Wi-Fi
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WiFi.begin(ssid, password);
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Serial.println("Connecting to WiFi");
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while (WiFi.status() != WL_CONNECTED) {
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delay(500);
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Serial.print(".");
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}
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Serial.println();
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// Print ESP Local IP Address
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Serial.println(WiFi.localIP());
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// Route for root / web page
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server.on("/", HTTP_GET, [](AsyncWebServerRequest *request){
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request->send_P(200, "text/html", index_html, processor);
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});
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server.on("/temperaturec", HTTP_GET, [](AsyncWebServerRequest *request){
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request->send_P(200, "text/plain", readDSTemperatureC().c_str());
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});
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server.on("/temperaturef", HTTP_GET, [](AsyncWebServerRequest *request){
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request->send_P(200, "text/plain", readDSTemperatureF().c_str());
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});
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// Start server
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server.begin();
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}
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void loop(){
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}
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