#include <WiFi.h>
#include <ThingSpeak.h>
#include "DHTesp.h"
char ssid[] = "Wokwi-GUEST";
char pass[] = "";
WiFiClient client;
unsigned long myChannelNumber = 2580205;
const char * myWriteAPIKey = "9Q57PK0JNJ8Q7TS6";
DHTesp dhtSensor;
TempAndHumidity data;
const int DHT_PIN =25 ;
const int TRIG_PIN = 17;
const int ECHO_PIN = 16;
long duration, distance;
int statusCode;
void setup() {
Serial.begin(115200);
WiFi.mode(WIFI_STA);
ThingSpeak.begin(client);
dhtSensor.setup(DHT_PIN, DHTesp::DHT22);
pinMode(TRIG_PIN, OUTPUT);
pinMode(ECHO_PIN, INPUT);
}
void loop() {
connectToCloud();
computeData();
writeData();
delay(1000);
}
void connectToCloud(){
if(WiFi.status() != WL_CONNECTED) {
Serial.print("Attempting to connect");
while(WiFi.status() != WL_CONNECTED) {
WiFi.begin(ssid, pass);
for(int i=0;i<5;i++) {
Serial.print(".");
delay(1000);
}
}
Serial.println("\nConnected.");
}
}
void computeData(){
distance = getDistanceInCentimeters();
data = dhtSensor.getTempAndHumidity();
Serial.println("-----------");
Serial.println("Dist: " + String(distance));
Serial.println("Temp: " + String(data.temperature));
Serial.println("Humi: " + String(data.humidity));
Serial.println("-----------");
}
void writeData(){
ThingSpeak.setField(1, distance);
ThingSpeak.setField(2, data.temperature);
ThingSpeak.setField(3,data.humidity );
statusCode = ThingSpeak.writeFields(myChannelNumber,myWriteAPIKey);
if(statusCode == 200) //successful writing code
Serial.println("Channel update successful.");
else
Serial.println("Problem Writing data. HTTP error code :" +
String(statusCode));
delay(15000); // data to be uploaded every 15secs
}
long getDistanceInCentimeters() {
digitalWrite(TRIG_PIN,LOW);
delayMicroseconds(2);
digitalWrite(TRIG_PIN, HIGH);
delayMicroseconds(10);
digitalWrite(TRIG_PIN, LOW);
duration = pulseIn(ECHO_PIN, HIGH);
return (duration * 0.034 / 2);
}
esp:0
esp:2
esp:4
esp:5
esp:12
esp:13
esp:14
esp:15
esp:16
esp:17
esp:18
esp:19
esp:21
esp:22
esp:23
esp:25
esp:26
esp:27
esp:32
esp:33
esp:34
esp:35
esp:3V3
esp:EN
esp:VP
esp:VN
esp:GND.1
esp:D2
esp:D3
esp:CMD
esp:5V
esp:GND.2
esp:TX
esp:RX
esp:GND.3
esp:D1
esp:D0
esp:CLK
dht1:VCC
dht1:SDA
dht1:NC
dht1:GND
ultrasonic1:VCC
ultrasonic1:TRIG
ultrasonic1:ECHO
ultrasonic1:GND