#include <Arduino.h>
#include <Adafruit_SHT4x.h>

Adafruit_SHT4x sht4 = Adafruit_SHT4x();
uint32_t timestamp = millis();

void sendReadingXML(uint32_t timestamp, float temperature, float humidity, const char *id);

void setup()
{
  Serial.begin(115200); // zacni seriovou komunikaci s baudrate 9600
  Serial.println("UART OK");

  pinMode(LED_BUILTIN, OUTPUT); // nastav ledku na desce jako vystup

  Serial.println("Adafruit SHT4x test"); // zadni komunikaci s SHT40 po I2C
  if (!sht4.begin())
  {
    Serial.println("Couldn't find SHT4x"); // pokud neni sensor nalezen, program skonci v nekonecne smycce
    while (1)
      delay(1);
  }
  Serial.println("Found SHT4x sensor");
  Serial.print("Serial number 0x");
  Serial.println(sht4.readSerial(), HEX);
  sht4.setPrecision(SHT4X_HIGH_PRECISION);
  sht4.setHeater(SHT4X_NO_HEATER);
}

void loop()
{
  sensors_event_t humidity, temp;

  sht4.getEvent(&humidity, &temp);  // cteni ze senzoru
  timestamp = millis(); // pocet milisekund od spusteni procesoru

  sendReadingXML(timestamp, temp.temperature, humidity.relative_humidity, "SHT40");

  digitalWrite(LED_BUILTIN, HIGH); // turn the LED on (HIGH is the voltage level)
  delay(250);                      // wait for a second
  digitalWrite(LED_BUILTIN, LOW);  // turn the LED off by making the voltage LOW
  delay(250);                      // wait for a second
}

void sendReadingXML(uint32_t timestamp, float temperature, float humidity, const char *id)
{
  Serial.print("<reading time=\"");
  Serial.print(timestamp);
  Serial.print("\" id=\"");
  Serial.print(id);
  Serial.println("\">");

  Serial.print("    <temp unit=\"C\">");
  Serial.print(temperature, 2);
  Serial.println("</temp>");

  Serial.print("    <humidity unit=\"%\">");
  Serial.print(humidity, 2);
  Serial.println("</humidity>");

  Serial.println("</reading>");
}