uv-index-notifier.ino

#include <RestClient.h>

#define INTERVAL 5000
#define SENSOR A0

RestClient client = RestClient("maker.ifttt.com");
String response;
int uvIndex = -1;

unsigned long previous = 0;

void setup() {
  Serial.begin(115200);
  pinMode(SENSOR, INPUT);

  client.begin("MyWiFi", "qwerty123");
  client.setContentType("application/json");
}

void loop() {
  if (millis() - previous >= INTERVAL) {
    previous = millis();

    String message;
    int sensorValue;
    int analogValue = analogRead(SENSOR);

    if (analogValue < 20) {
      sensorValue = 0;
    } else {
      sensorValue = (0.05 * analogValue) - 1;
    }

    if (uvIndex != sensorValue) {
      uvIndex = sensorValue;

      if (uvIndex < 3) {
        message = "It's the best time to go out on the beach! If you burn easily, put some sunscreen!";
      } else if (uvIndex > 2 && uvIndex < 6) {
        message = "It's okay to go out on the beach but be sure to put some sunscreen!";
      } else if (uvIndex > 5 && uvIndex < 8) {
        message = "Don't risk it! Go out if it's 4PM onwards!";
      } else if (uvIndex > 7) {
        message = "You don't want to go to the beach right now. Just don't";
      }

      postDataToIfttt(message);
    }
  }
}

void postDataToIfttt(String data) {
  response = "";
  String postData = "{ \"value1\" : \"" + data + "\"," + " \"value2\" : \"\", \"value3\" : \"\" }";
  Serial.println(postData);
  int statusCode = client.post("/trigger/event/with/key/your_maker_key", postData.c_str(), &response);
  Serial.print("Status code from server: ");
  Serial.println(statusCode);
  Serial.print("Response body from server: ");
  Serial.println(response);
}