GsrESxFr

1#include <OneWire.h>
2#include <DallasTemperature.h>
3#include <WiFi.h>                  //already included in esp32 package
4#include "DHT.h"
5
6#define DHTPIN 32
7#define oneWireBus  33
8#define DHTTYPE DHT22
9#define moistPin  35
10#define LDRPin  34
11DHT dht(DHTPIN, DHTTYPE);
12OneWire oneWire(oneWireBus);
13DallasTemperature sensors(&oneWire);
14String apiKey = "BE7U15RJYY57AV91";                  //  Enter your Write API key from ThingSpeak
15const char *ssid =  "SSID";                                    // replace with your wifi ssid and wpa2 key
16const char *pass =  "PASSWORD";
17const char* server = "api.thingspeak.com";           //don't change
18float soilTemperature, h, t, lightIntensity, soilMoisture;
19WiFiClient client;
20void setup()
21{
22  Serial.begin(115200);
23  delay(10);
24  Serial.begin(115200);
25  sensors.begin();  //starts ds18b20
26  dht.begin();   //give 2 second delay to all sensors
27  Serial.println("Connecting to ");
28  Serial.println(ssid);
29  WiFi.begin(ssid, pass);
30  while (WiFi.status() != WL_CONNECTED)
31  {
32    delay(500);
33    Serial.print(".");
34  }
35  Serial.println("");
36  Serial.println("WiFi connected");
37
38}
39void loop()
40{
41  if (client.connect(server, 80))                                //   "184.106.153.149" or api.thingspeak.com
42  {
43
44    String postStr = apiKey;                          //keep the apikey variable unchanged just add fields and values
45    postStr += "&field1=";
46    postStr += String(h);
47    postStr += "&field2=";
48    postStr += String(t);
49    postStr += "&field3=";
50    postStr += String(soilTemperature);
51    postStr += "&field4=";
52    postStr += String(lightIntensity);
53    postStr += "&field5=";
54    postStr += String(soilMoisture);
55    postStr += "\r\n\r\n";
56
57    client.print("POST /update HTTP/1.1\n");               //keep this part unchanged
58    client.print("Host: api.thingspeak.com\n");
59    client.print("Connection: close\n");
60    client.print("X-THINGSPEAKAPIKEY: " + apiKey + "\n");
61    client.print("Content-Type: application/x-www-form-urlencoded\n");
62    client.print("Content-Length: ");
63    client.print(postStr.length());
64    client.print("\n\n");
65    client.print(postStr);
66    client.stop();
67    Serial.println("Waiting...");
68    delay(30000);                                      //the website accepts values in 30 seconds so we add a delay of 30 seconds before loop restarts
69    getSensorValues();
70  }
71}
72
73
74  void getSensorValues() {
75    sensors.requestTemperatures();
76    float soilTemp = sensors.getTempCByIndex(0);
77    float h = dht.readHumidity();
78    t = dht.readTemperature();
79    if (isnan(h) || isnan(t)) {
80      Serial.println(F("Failed to read from DHT sensor!")); //print to server
81      return;
82    }
83    lightIntensity = analogRead(LDRPin); // read the value from the LDR
84    soilMoisture = analogRead(moistPin);
85  }