2018年7月24日 星期二

DHT11, LDR , MQTT, Node-RED, Google Chart, MongoDB





















//D1 --SSD1305 SCL
//D2 --SSD1306 SDA

// Including the ESP8266 WiFi library
#include <ESP8266WiFi.h>
#include "DHT.h"
#include  "Adafruit_Sensor.h"
#include <SPI.h>
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
//---------MQTT------------------------
#include <PubSubClient.h>
//---------SSD1306----------------------
#define OLED_RESET LED_BUILTIN  //4
Adafruit_SSD1306 display(OLED_RESET);

// Uncomment one of the lines below for whatever DHT sensor type you're using!
#define DHTTYPE DHT11   // DHT 11
//#define DHTTYPE DHT21   // DHT 21 (AM2301)
//#define DHTTYPE DHT22   // DHT 22  (AM2302), AM2321

// Replace with your network details
//const char* ssid = "YOUR_NETWORK_NAME";
//const char* password = "YOUR_NETWORK_PASSWORD";
const char* ssid = "74170287";
const char* password = "24063173";

// Web Server on port 80
WiFiServer server(80);

// DHT Sensor
const int DHTPin = D3;
// Initialize DHT sensor.
DHT dht(DHTPin, DHTTYPE);

// Temporary variables
static char celsiusTemp[7];
static char fahrenheitTemp[7];
static char humidityTemp[7];
//static char LDRTemp[7];

//--------CDS LDR---------------------
//double data;
int light;
const int lightPin = A0;
//---------MQTT------------------------
const char* mqtt_server = "broker.mqtt-dashboard.com";
//const char* mqtt_server = "iot.eclipse.org";
WiFiClient espClient;
PubSubClient client_mqtt(espClient);
long lastMsg = 0;
char msg[50];
int value = 0;
const int DHT11_PIN= D3;

String ipToString(IPAddress ip){
  String s="";
  for (int i=0; i<4; i++)
    s += i  ? "." + String(ip[i]) : String(ip[i]);
  return s;
}
//---------MQTT------------------------
void callback(char* topic, byte* payload, unsigned int length)
{
  Serial.print("Command is : [");
  Serial.print(topic);
  int p =(char)payload[0]-'0';
  float h = dht.readHumidity();
  // Read temperature as Celsius (the default)
  float t = dht.readTemperature();
  // Read temperature as Fahrenheit (isFahrenheit = true)
  float f = dht.readTemperature(true);
  // Check if any reads failed and exit early (to try again).
  if (isnan(h) || isnan(t) || isnan(f)) {
        Serial.println("Failed to read from DHT sensor!");
        strcpy(celsiusTemp,"Failed");
        strcpy(fahrenheitTemp, "Failed");
        strcpy(humidityTemp, "Failed");       
        }
   else{

  // if MQTT comes a 0 message, show humidity
  if(p==0)
  {
    Serial.println("to show humidity!]");
    Serial.print(" Humidity is: " );
    float h = dht.readHumidity();     
    Serial.print(h,2);
    Serial.println('%');
  }
  // if MQTT comes a 1 message, show temperature
  if(p==1)
  {
  // digitalWrite(BUILTIN_LED, HIGH);
   Serial.println(" is to show temperature!] ");
   float t = dht.readTemperature();     
   Serial.print(" Temp is: " );
   Serial.print(t,2);
   Serial.println(' C');
  }
   if(p==2)
  {
  // digitalWrite(BUILTIN_LED, HIGH);
   Serial.println(" is to show LDR Sensor!] ");
   light = analogRead (lightPin);
   light = map (light, 0, 1023, 0, 100); // scaled from 100 - 0 (lower is darker)
   Serial.print(" LDR is: " );
   Serial.print(light);     
   //float Analogdata = analogRead(A0);     
   //Serial.print(" LDR is: " );
   //Serial.print(Analogdata,2);
   Serial.println();
  }
  Serial.println();
 }
} //end callback

void reconnect() {
  // Loop until we're reconnected
  while (!client_mqtt.connected())
  {
    Serial.print("Attempting MQTT connection...");
    // Create a random client ID
    String clientId = "ESP8266Client-";
    clientId += String(random(0xffff), HEX);
    // Attempt to connect
    //if you MQTT broker has clientID,username and password
    //please change following line to    if (client.connect(clientId,userName,passWord))
    if (client_mqtt.connect(clientId.c_str()))
    {
      Serial.println("connected");
     //once connected to MQTT broker, subscribe command if any
      client_mqtt.subscribe("alex9ufoCommand");
    } else {
      Serial.print("failed, rc=");
      Serial.print(client_mqtt.state());
      Serial.println(" try again in 5 seconds");
      // Wait 6 seconds before retrying
      delay(6000);
    }
  }
} //end reconnect()

// only runs once on boot
void setup() {
  pinMode(A0, INPUT);
  // Initializing serial port for debugging purposes
  Serial.begin(115200);
  delay(10);
  dht.begin();

  display.begin(SSD1306_SWITCHCAPVCC, 0x3C);
  // Clear the buffer.
  display.clearDisplay();
  display.display();

  display.setTextSize(1);
  display.setTextColor(WHITE);
  display.setCursor(0,0);
  display.println("Hello from:");
  display.println("http://alex9ufo.blogspot.com/");
  display.display();

  // Connecting to WiFi network
  Serial.println();
  Serial.print("Connecting to ");
  Serial.println(ssid);

  WiFi.begin(ssid, password);

  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println("");
  Serial.println("WiFi connected");

  // Starting the web server
  server.begin();
  Serial.println("Web server running. Waiting for the ESP IP...");
  delay(10000);

  // Printing the ESP IP address
  Serial.println(WiFi.localIP());
  //---------MQTT------------------------
  client_mqtt.setServer(mqtt_server, 1883);
  client_mqtt.setCallback(callback);
  //---------MQTT------------------------

  String ips=ipToString(WiFi.localIP());
  display.setCursor(0,36);
  display.print("IP Add:");
  display.println(ips);
  display.display();
}


// runs over and over again
void loop() {
  // Listenning for new clients
  WiFiClient client = server.available();

  if (client) {
    Serial.println("New client");
    // bolean to locate when the http request ends
    boolean blank_line = true;
    while (client.connected()) {
      if (client.available()) {
        char c = client.read();
     
        if (c == '\n' && blank_line) {
            // Sensor readings may also be up to 2 seconds 'old' (its a very slow sensor)
            float h = dht.readHumidity();
            // Read temperature as Celsius (the default)
            float t = dht.readTemperature();
            // Read temperature as Fahrenheit (isFahrenheit = true)
            float f = dht.readTemperature(true);
            // Check if any reads failed and exit early (to try again).
            if (isnan(h) || isnan(t) || isnan(f)) {
              Serial.println("Failed to read from DHT sensor!");
              strcpy(celsiusTemp,"Failed");
              strcpy(fahrenheitTemp, "Failed");
              strcpy(humidityTemp, "Failed");       
            }
            else{
              /*
              // Compute heat index in Fahrenheit (the default)
              float hif = dht.computeHeatIndex(f, h);
              // Compute heat index in Celsius (isFahreheit = false)
              float hic = dht.computeHeatIndex(t, h, false); */
           
              // Computes temperature values in Celsius + Fahrenheit and Humidity
              float hic = dht.computeHeatIndex(t, h, false);     
              dtostrf(hic, 6, 2, celsiusTemp);           
              float hif = dht.computeHeatIndex(f, h);
           
              dtostrf(hif, 6, 2, fahrenheitTemp);       
              dtostrf(h, 6, 2, humidityTemp);
           
              //data = analogRead(A0);
              //dtostrf(data, 6, 2, LDRTemp);
               // Read light sensor
              light = analogRead (lightPin);
              light = map (light, 0, 1023, 0, 100); // scaled from 100 - 0 (lower is darker)
              // You can delete the following Serial.print's, it's just for debugging purposes
              Serial.print("Humidity: ");
              Serial.print(h);
              /*
              Serial.print(" %\t Temperature: ");
              Serial.print(t);
              Serial.print(" *C ");
              Serial.print(f);
              Serial.print(" *F\t Heat index: ");
              Serial.print(hic);
              Serial.print(" *C ");
              Serial.print(hif);
              Serial.print(" *F");
              Serial.print("Humidity: ");
              Serial.print(h);
              Serial.print(" %\t Temperature: ");
              Serial.print(t);
              Serial.print(" *C ");
              Serial.print(f);
              Serial.print(" *F\t Heat index: ");
              Serial.print(hic);
              Serial.print(" *C ");
              Serial.print(hif);
              Serial.println(" *F");
              Serial.print(" LDR Sensor:");
              Serial.print(data);  */
              //-------------SSD 1306 Display-------------------//
                // Clear the buffer.
              display.clearDisplay();
              display.display();

              display.setTextSize(1);
              display.setTextColor(WHITE);
              display.setCursor(0,0);
              display.print("TemCel:");
              display.print(celsiusTemp);
              display.println(" *C ");
           
              display.setCursor(0,8);           
              display.print("TemFah:");
              display.print(fahrenheitTemp);
              display.println(" *F ");
           
              display.setCursor(0,16);           
              display.print("Humidity:");
              display.print(humidityTemp);
              display.println(" %");           
              //-------------SSD 1306 Display-------------------//
              display.setCursor(0,24);
              display.print("LDR Sensor:");
              //light = analogRead (lightPin);
              //light = map (l, 0, 1023, 0, 100); // scaled from 100 - 0 (lower is darker)
              display.print(light);
           
              display.setCursor(0,36);
              display.println("http://alex9ufo.blogspot.com/");
              display.display();
              //-------------SSD 1306 Display-------------------//

            }
            client.println("HTTP/1.1 200 OK");
            client.println("Content-Type: text/html");
            client.println("Connection: close");
            client.println();
            // your actual web page that displays temperature and humidity
            client.println("<!DOCTYPE HTML>");
            client.println("<html>");
            client.println("<head></head><body><h1>WeMos D1-Temperature and Humidity , LDR Sensor</h1><h3>Temperature in Celsius: ");
            client.println(celsiusTemp);
            client.println("*C</h3><h3>Temperature in Fahrenheit: ");
            client.println(fahrenheitTemp);
            client.println("*F</h3><h3>Humidity: ");
            client.println(humidityTemp);
            client.println("%</h3><h3>");
         
            client.println("</h3><h3>LDR Sensor: ");
            client.println(light);
            client.println("</h3><h3>");
         
            client.println("</body></html>");   
            break;
        }
        if (c == '\n') {
          // when starts reading a new line
          blank_line = true;
        }
        else if (c != '\r') {
          // when finds a character on the current line
          blank_line = false;
        }
      }
    }
    // closing the client connection
    delay(1);
    client.stop();
    Serial.println("Client disconnected.");
 
  }

if (!client_mqtt.connected()) {
    reconnect();
  }
  client_mqtt.loop();
  long now = millis();
  // read DHT11 sensor every 6 seconds
  if (now - lastMsg > 6000) {
     lastMsg = now;
     // Sensor readings may also be up to 2 seconds 'old' (its a very slow sensor)
     float h = dht.readHumidity();
     // Read temperature as Celsius (the default)
     float t = dht.readTemperature();
 
     // Read temperature as Fahrenheit (isFahrenheit = true)
     float f = dht.readTemperature(true);
     // Computes temperature values in Celsius + Fahrenheit and Humidity
     float hic = dht.computeHeatIndex(t, h, false);     
     light = analogRead (lightPin);
     light = map (light, 0, 1023, 0, 100); // scaled from 100 - 0 (lower is darker)
     if (isnan(h) || isnan(t) || isnan(f)) {
        Serial.println("Failed to read from DHT sensor!");
        strcpy(celsiusTemp,"Failed");
        strcpy(fahrenheitTemp, "Failed");
        strcpy(humidityTemp, "Failed");       
         }
      else{

     // Convert data to character array
     char tChar[10];
     char hChar[10];
     char hicChar[10];
     char lChar[10];
     dtostrf(t, 4, 2, tChar);
     dtostrf(h, 4, 2, hChar);
     dtostrf(hic, 4, 2, hicChar);
     dtostrf(light, 4, 2, lChar);

    // Publish data character array to MQTT topics
    client_mqtt.publish("alex9ufo/weather/humidity", hChar);
    client_mqtt.publish("alex9ufo/weather/temperature", tChar);
    client_mqtt.publish("alex9ufo/weather/heatindex", hicChar);
    client_mqtt.publish("alex9ufo/weather/light", lChar);

   
    // Convert data to JSON string
 
     String json =
    "{\"data\":{"
    "\"humidity\": \"" + String(h) + "\","
    "\"temperature\": \"" + String(t) + "\","
    "\"heatindex\": \"" + String(hic) + "\","
    "\"light\": \"" + String(light) + "\"}"
    "}";
   // Convert JSON string to character array
   char jsonChar[100];
   json.toCharArray(jsonChar, json.length()+1);

   // Publish JSON character array to MQTT topic
   client_mqtt.publish("alex9ufo/weather/json", jsonChar);
   /*******************
   // Print to Console
   ********************/

   Serial.println(" ");
   Serial.println("Data");
   Serial.println(json); 
   }  //esle
   
 }


=================================================
node-red jason file

[{"id":"71b52fdc.d6182","type":"mongodb out","z":"59798b21.806fc4","mongodb":"da868d72.ad9c7","name":"mongodb save","collection":"weatherstation1","payonly":true,"upsert":true,"multi":false,"operation":"insert","x":700,"y":80,"wires":[]},{"id":"da13477b.a05df8","type":"mqtt in","z":"59798b21.806fc4","name":"alex9ufo/weather/#","topic":"alex9ufo/weather/#","qos":"2","broker":"57be2704.cd8468","x":127,"y":104,"wires":[["d5396705.c057b8","61b3ba26.16da44"]]},{"id":"61b3ba26.16da44","type":"debug","z":"59798b21.806fc4","name":"alex9ufo/weather/#","active":false,"tosidebar":false,"console":false,"tostatus":false,"complete":"payload","x":390,"y":100,"wires":[]},{"id":"d52320ec.ffc56","type":"mongodb in","z":"59798b21.806fc4","mongodb":"da868d72.ad9c7","name":"weatherstation","collection":"weatherstation1","operation":"find","x":300,"y":640,"wires":[["de2c61c1.dd6de","8484b45c.3c2848"]]},{"id":"da57953.16abe68","type":"mongodb in","z":"59798b21.806fc4","mongodb":"da868d72.ad9c7","name":"weatherstation","collection":"weatherstation1","operation":"find","x":320,"y":520,"wires":[["aca4e2e3.db875"]]},{"id":"aca4e2e3.db875","type":"http response","z":"59798b21.806fc4","name":"weather response","x":550,"y":520,"wires":[]},{"id":"4fe1e569.ca654c","type":"http in","z":"59798b21.806fc4","name":"[get] /showweather","url":"/showweather","method":"get","upload":false,"swaggerDoc":"","x":110,"y":520,"wires":[["da57953.16abe68"]]},{"id":"2cc35f3e.60356","type":"comment","z":"59798b21.806fc4","name":"Weather Station Data in HTML/JSON View","info":"","x":180,"y":480,"wires":[]},{"id":"4297471.8885eb8","type":"chart request","z":"59798b21.806fc4","charttype":"AnnotationChart","path":"/mqttchart2","refresh":"","formatx":"","formaty":"","attribs":[{"name":"date","type":"date"},{"name":"temperature","type":"number"},{"name":"humidity","type":"number"},{"name":"light","type":"number"}],"x":90,"y":640,"wires":[["d52320ec.ffc56"]]},{"id":"8484b45c.3c2848","type":"debug","z":"59798b21.806fc4","name":"chart debug","active":true,"tosidebar":false,"console":false,"tostatus":false,"complete":"payload","x":550,"y":660,"wires":[]},{"id":"de2c61c1.dd6de","type":"chart 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