NodeMCU reading temperature values from one DS18B20 and publish on a specific web link
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276
Benni_rafvirki_5.ino
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276
Benni_rafvirki_5.ino
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//Codigo a funcionar bem. Temperatura a ser enviada para a base de dados
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//http://bennirafvirki.is/sensors/ui/readings
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//Working well for Fífusel 7
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//Bennirafvirki.is/sensors/
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//Benni +3547738039
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#ifdef ESP32 // Import required libraries
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#include <WiFi.h>
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#else
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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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#endif
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#include <OneWire.h>
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#include <DallasTemperature.h>
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#define ONE_WIRE_BUS 4 // Data wire is connected to GPIO 4 = pin D2
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OneWire oneWire(ONE_WIRE_BUS); // Setup a oneWire instance to communicate with any OneWire devices
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DallasTemperature sensors(&oneWire); // Pass our oneWire reference to Dallas Temperature sensor
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//#include <ESP8266WiFi.h>
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#include <ESP8266HTTPClient.h>
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#include <WiFiClient.h>
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//#define SERVER_IP "bennirafvirki.is"
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// Replaced parameters
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// Rikki
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const char* ssid = "Asus2"; //network credentials
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const char* password = "lukas1234";
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/* F7
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//const char* ssid = "Hringdu-2.4G-2dfM"; //network credentials F7
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const char* password = "8hs9gmmV";
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*/
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const int tmin = -3; // min temperature
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const int tmax = 3; // max temperature
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String address = "electropepper";
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int time_of_delay = 50000; //if 50000 ms, than will measure each minute interval
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// pinout D0=pin16; D1=pin5/GPIO5; D2=pin4/GPIO4; D3=0/Flash; D4=2/Tx1; D5=14; D6=12; D7=13=Rx2; D8=15=Tx2; D9=3=Rx0; D10=1=Tx0;
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//const int relay1 = 5; //pin D1 = GPIO5 , relay 1
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//const int relay2 = 14; //pin D5 = GPIO14, relay 2
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const int relay1 = 16;
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const int relay2 = 5;
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/// Serial port for debugging purposes Serial.begin(115200); Serial monitoring
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AsyncWebServer server(80); // Create AsyncWebServer object on port 80
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String readDSTemperatureC() // Call sensors.requestTemperatures() to issue a global temperature and Requests to all devices on the bus
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{
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sensors.requestTemperatures();
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float tempC = sensors.getTempCByIndex(0);
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if (tempC == -127.00 || tempC == 85.00 )
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{
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Serial.println("Failed to read from DS18B20 sensor");
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/////////////////////////////////////////////////////////////////////////////////////
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////////////////////////////////////////////////////could you created README.MD file in your project folder with those notes?
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return "--";
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}
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else
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{
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//Serial.print("Temperature Celsius: ");
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//Serial.print(tempC);
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}
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return String(tempC);
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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: 1.0rem; }
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h3 { font-size: 1.0rem; }
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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> Fifusel, Reykjavik </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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<h3 class="ds-labels">Heaters are ON between -3 and 3 celcius </h3>
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<h2> Benni 7738039 </h2>
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<h2> Bennirafvirki.is </h2>
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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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{
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var xhttp = new XMLHttpRequest();
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xhttp.onreadystatechange = function()
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{
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if (this.readyState == 4 && this.status == 200)
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{
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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) ; //time 10sec
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</script>
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</html>)rawliteral";
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String processor(const String& var) // Replaces placeholder with DHT values
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{
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//Serial.println(var);
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if (var == "TEMPERATUREC")
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{
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return readDSTemperatureC();
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}
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return String();
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}
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void setup()
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{
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pinMode(relay1, OUTPUT);
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digitalWrite(relay1, LOW);
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pinMode(relay2, OUTPUT);
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digitalWrite(relay2, LOW);
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Serial.begin(115200); // Serial port for debugging purposes ( baud)
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Serial.println();
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sensors.begin(); // Start up the DS18B20 library
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WiFi.begin(ssid, password); // Connect to Wi-Fi
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Serial.println("Connecting to WiFi");
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while (WiFi.status() != WL_CONNECTED)
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{
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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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Serial.println(WiFi.localIP()); // Print ESP Local IP Address 192.168.1.18
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server.on("/", HTTP_GET, [](AsyncWebServerRequest * request) // Route for root / web page
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{
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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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{
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request->send_P(200, "text/plain", readDSTemperatureC().c_str());
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});
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server.begin(); // Start server
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}
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void loop()
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{
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float tempC = sensors.getTempCByIndex(0);
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if (tempC > tmin && tempC < tmax)
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{
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digitalWrite(relay1, LOW);
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digitalWrite(relay2, LOW);
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Serial.print("Temperature is ");
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Serial.print(tempC);
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Serial.println(" Celcius and the heaters are ON ");
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}
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else
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{
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digitalWrite(relay1, HIGH);
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digitalWrite(relay2, HIGH);
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Serial.print("Temperature is ");
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Serial.print(tempC) ;
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Serial.println(" Celcius and the heaters are OFF ");
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}
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delay(10000);
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// wait for WiFi connection
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if ((WiFi.status() == WL_CONNECTED))
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{
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WiFiClient client;
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HTTPClient http;
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Serial.print("[HTTP] begin...\n");
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// configure traged server and url
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///////////////////////////////////////////////////////////////////////////////////////////////////////////
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//could you created README.MD file in your project folder with those notes?
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//change to: if tempC is between min and max, so it´s: 0 (OFF), 1 (ON), 2 sensor disconnected, 3 wire or resistance fail, 4
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// if tempC = -127, sensor or resistance disconnect, if tempC = 85, sensor
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int sensor_status = 0;
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String link1 = "http://bennirafvirki.is/sensors/add/temperature/";
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String link2 = String(tempC,DEC%4);
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String link3 = "/address/";
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String link4 = String(address);
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String link5 = "/state/";
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String link6 = String(sensor_status,DEC);
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String link = link1 + link2 + link3 + link4 + link5 + link6 ;
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http.begin(client,link); //Serial.print(link);
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http.addHeader("Content-Type", "application/json");
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Serial.print("[HTTP] POST...\n");
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// start connection and send HTTP header and body
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int httpCode = http.POST("{\"hello\":\"world\"}");
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// httpCode will be negative on error
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if (httpCode > 0)
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{
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// HTTP header has been send and Server response header has been handled
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Serial.printf("[HTTP] POST... code: %d\n", httpCode);
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// file found at server
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if (httpCode == HTTP_CODE_OK)
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{
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const String& payload = http.getString();
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Serial.println("received payload:\n<<");
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Serial.println(payload);
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Serial.println(">>");
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}
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}
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else
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{
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Serial.printf("[HTTP] POST... failed, error: %s\n", http.errorToString(httpCode).c_str());
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}
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http.end();
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}
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delay(time_of_delay);
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}
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