Temperature, Humidity and Soil Moisture Sensor with Nodemcu

1#include <WiFi.h>
2#include <WiFiMulti.h>
3#include <HTTPClient.h>
4#include   <Adafruit_Sensor.h>
5#include <DHT.h>
6#include <DHT_U.h>
7
8WiFiMulti WiFiMulti;
9HTTPClient   ask;
10
11// user config: TODO
12#define  MOISTURE_THRESHOLD     55   // moisture   alert threshold
13
14const char* ssid = "***";             // enter wifi user   name 
15const char* password = "***";         // enter wifi password
16const   char* apiKeyIn = "E5IiZ2835YBOgiiQwKjEErx7gaiaVIbw";      // Write your api key   given from ask sensor
17const unsigned int writeInterval = 25000; // write interval   (in ms)
18
19// ASKSENSORS config.
20const char* host = "api.asksensors.com";   // ASKSENSORS API host name
21const int httpPort = 80;      // port
22
23//   DHT config.
24#define DHTPIN            4         ////d4 Pin which is connected   to the DHT sensor.
25// Uncomment the type of sensor in use:
26#define DHTTYPE            DHT11     // DHT 11 
27//#define DHTTYPE           DHT22     // DHT   22 (AM2302)
28//#define DHTTYPE           DHT21     // DHT 21 (AM2301)
29DHT_Unified   dht(DHTPIN, DHTTYPE);
30uint32_t delayMS;
31int status = WL_IDLE_STATUS;
32float   myTemperature = 0, myHumidity = 0; 
33int moisture_Pin= A0; // Soil Moisture Sensor   input at Analog PIN vp
34int moisture_value= 0, moisture_state = 0xFF;
35
36//   create ASKSENSORS client
37// 
38void setup() {
39 // open serial
40  Serial.begin(115200);
41
42   Serial.println("Wait for WiFi... ");
43
44  // connecting to the WiFi network
45   WiFiMulti.addAP(ssid, password);
46  while (WiFiMulti.run() != WL_CONNECTED)   {
47    Serial.print(".");
48    delay(500);
49  }
50  // connected
51  Serial.println("WiFi   connected");
52  Serial.println("IP address: ");
53  Serial.println(WiFi.localIP());
54   
55  // Initialize device.
56  dht.begin();
57  Serial.println("DHTxx Unified   Sensor Example");
58  // Print temperature sensor details.
59  sensor_t sensor;
60   dht.temperature().getSensor(&sensor);
61  Serial.println("------------------------------------");
62   Serial.println("Temperature");
63  Serial.print  ("Sensor:       "); Serial.println(sensor.name);
64   Serial.print  ("Driver Ver:   "); Serial.println(sensor.version);
65  Serial.print   ("Unique ID:    "); Serial.println(sensor.sensor_id);
66  Serial.print  ("Max   Value:    "); Serial.print(sensor.max_value); Serial.println(" C");
67  Serial.print   ("Min Value:    "); Serial.print(sensor.min_value); Serial.println(" C");
68   Serial.print  ("Resolution:   "); Serial.print(sensor.resolution); Serial.println("   C");  
69  Serial.println("------------------------------------");
70  // Print   humidity sensor details.
71  dht.humidity().getSensor(&sensor);
72  Serial.println("------------------------------------");
73   Serial.println("Humidity");
74  Serial.print  ("Sensor:       "); Serial.println(sensor.name);
75   Serial.print  ("Driver Ver:   "); Serial.println(sensor.version);
76  Serial.print   ("Unique ID:    "); Serial.println(sensor.sensor_id);
77  Serial.print  ("Max   Value:    "); Serial.print(sensor.max_value); Serial.println("%");
78  Serial.print   ("Min Value:    "); Serial.print(sensor.min_value); Serial.println("%");
79   Serial.print  ("Resolution:   "); Serial.print(sensor.resolution); Serial.println("%");   
80  Serial.println("------------------------------------");
81  // Set delay   between sensor readings based on sensor details.
82  delayMS = sensor.min_delay   / 1000;
83}
84
85void loop() {
86   
87   Serial.println("            Temperature,   Humidity and Soil Moisture sensors ");
88        Serial.print("Moisture level   : ");
89    moisture_value= analogRead(moisture_Pin);
90    moisture_value= moisture_value/10;
91     Serial.println(moisture_value);
92   if(moisture_value > MOISTURE_THRESHOLD)   moisture_state = 0;
93   else moisture_state = 1;
94// Read data from DHT
95//   Delay between measurements.
96  delay(delayMS);
97  // Get temperature event and   print its value.
98  sensors_event_t event;  
99  dht.temperature().getEvent(&event);
100   if (isnan(event.temperature)) {
101    Serial.println("Error reading temperature!");
102   }
103  else {
104    // Update temperature and humidity
105    myTemperature =   (float)event.temperature;
106    Serial.print("Temperature: ");
107    Serial.print(myTemperature);
108     Serial.println(" C");
109  }
110  // Get humidity event and print its value.
111   dht.humidity().getEvent(&event);
112  if (isnan(event.relative_humidity)) {
113     Serial.println("Error reading humidity!");
114  }
115  else {
116     myHumidity   = (float)event.relative_humidity;
117    Serial.print("Humidity: ");
118    Serial.print(myHumidity);
119     Serial.println("%");
120  }
121  
122// Use WiFiClient class to create TCP   connections
123  WiFiClient client;
124
125
126  if (!client.connect(host, httpPort))   {
127    Serial.println("connection failed");
128    return;
129  }else {
130     
131    // Create a URL for the request
132  String url = "https://api.asksensors.com/write/";
133   url += apiKeyIn;
134  url += "?module1=";
135  url += myTemperature;
136  url   += "&module2=";
137  url += myHumidity;
138  url += "&module3=";
139  url +=   moisture_value;
140  url += "&module4=";
141  url += moisture_state;
142  
143   Serial.print(" requesting URL: ");
144  Serial.println(url);
145  
146   ask.begin(url);   //Specify the URL
147          Serial.println("Temperature, Humidity and Soil moisture   data sent to Asksensors");
148
149    //Check for the returning code
150    int   httpCode = ask.GET();          
151 
152    if (httpCode > 0) { 
153 
154        String   payload = ask.getString();
155        Serial.println(httpCode);
156        Serial.println(payload);
157       } else {
158      Serial.println("Error on HTTP request");
159    }
160   
161    ask.end(); //End 
162    Serial.println(" End ");
163
164  }
165
166  client.stop();   // stop client
167  
168  delay(writeInterval);    // delay
169}
170