ESP 32 TEMERATURE AND HTTP CLIENT PROGRASMS

 ESP 32 TEMERATURE AND HTTP CLIENT PROGRASMS:

ESP 32 TEMERATURE PROGRAM :

extern "C" 

  uint8_t temprature_sens_read(); 

uint8_t temprature_sens_read();

void setup() {

  Serial.begin(115200);

}

void loop() {

  Serial.print("Temperature in deg Celcius: ");

  // Convert raw temperature in F to Celsius degrees

  Serial.print((temprature_sens_read() - 32) / 1.8);

  Serial.println(" C");

  delay(5000);

}

ESP32 HTTP CLIENT PROGRAM :

#include <WiFi.h>

#include <WiFiMulti.h>

#include <HTTPClient.h>

WiFiMulti wifiMulti; // Declaring wifiMulti instance in WiFiMulti Class

void setup() {

    Serial.begin(115200);

    Serial.println();

    Serial.println();

    Serial.println();

    for(uint8_t t = 4; t > 0; t--) {

        Serial.printf("[SETUP] WAIT %d...\n", t);

        Serial.flush(); // flush is used to clear the stack

        delay(1000);

    }

    //using wifiMulti, we can add multiple WiFi credentials

    wifiMulti.addAP("SmS", "sms123458955");

    wifiMulti.addAP("SSID1", "PASSWORD1");

    wifiMulti.addAP("SSID2", "PASSWORD2"); 

}

void loop() {

    // wait for WiFi connection

    if((wifiMulti.run() == WL_CONNECTED)) 

    {

        HTTPClient http;

        Serial.print("[HTTP] begin...\n");

        // configure traged server and url

        

        http.begin("http://example.com/index.html"); //HTTP

        Serial.print("[HTTP] GET...\n");

        // start connection and send HTTP header

        int httpCode = http.GET();

        // httpCode will be negative on error

        if(httpCode > 0) 

        {  

            // HTTP header has been send and Server response header has been handled

            Serial.printf("[HTTP] GET... code: %d\n", httpCode);

            // file found at server

            if(httpCode == HTTP_CODE_OK) 

            {

                String payload = http.getString();

                Serial.println(payload);

            }

        } else 

        {

            Serial.printf("[HTTP] GET... failed, error: %s\n", http.errorToString(httpCode).c_str());

        }

        http.end();

    }

    delay(5000);

}