// Distributed with a free-will license.

// Use it any way you want, profit or free, provided it fits in the licenses of its associated works.

// SHT30

// This code is designed to work with the SHT30_I2CS I2C Mini Module available from ControlEverything.com.

// https://www.controleverything.com/content/Humidity?sku=SHT30_I2CS#tabs-0-product_tabset-2

#include <Wire.h>

// SHT30 I2C address is 0x44(68)

#define Addr 0x44

void setup()

{

// Initialise I2C communication as MASTER

Wire.begin();

// Initialise serial communication, set baud rate = 9600

Serial.begin(9600);

delay(300);

}

void loop()

{

unsigned int data[6];

// Start I2C Transmission

Wire.beginTransmission(Addr);

// Send measurement command

Wire.write(0x2C);

Wire.write(0x06);

// Stop I2C transmission

Wire.endTransmission();

delay(500);

// Request 6 bytes of data

Wire.requestFrom(Addr, 6);

// Read 6 bytes of data

// cTemp msb, cTemp lsb, cTemp crc, humidity msb, humidity lsb, humidity crc

if (Wire.available() == 6)

{

data[0] = Wire.read();

data[1] = Wire.read();

data[2] = Wire.read();

data[3] = Wire.read();

data[4] = Wire.read();

data[5] = Wire.read();

}

// Convert the data

float cTemp = ((((data[0] * 256.0) + data[1]) * 175) / 65535.0) - 45;

float fTemp = (cTemp * 1.8) + 32;

float humidity = ((((data[3] * 256.0) + data[4]) * 100) / 65535.0);

// Output data to serial monitor

Serial.print("Relative Humidity : ");

Serial.print(humidity);

Serial.println(" %RH");

Serial.print("Temperature in Celsius : ");

Serial.print(cTemp);

Serial.println(" C");

Serial.print("Temperature in Fahrenheit : ");

Serial.print(fTemp);

Serial.println(" F");

delay(500);

}