SHT1x Library

SHT1x series sensor driver.

• Read Temperature in Raw data, Celsius and Fahrenheit
• Read Humidity in Raw data and percentage
• Config sensor resolution
• Control internal heater

Hardware Support

It is easy to port this library to any platform. But now it is ready for use in:

• AVR (ATmega32)
• STM32 (HAL)
• ESP32 (esp-idf)

How To Use

1. Add SHT1x.h and SHT1x.c files to your project. It is optional to use SHT1x_platform.h and SHT1x_platform.c files (open and config SHT1x_platform.h file).
2. Initialize platform-dependent part of handler.
3. Call SHT1x_Init().
4. Call other functions and enjoy.

Example

Using SHT1x_platform files

#include <stdio.h>
#include "SHT1x.h"
#include "SHT1x_platform.h"

int main(void)
{
  SHT1x_Handler_t Handler;
  SHT1x_Sample_t  Sample;

  SHT1x_Platform_Init(&Handler);
  SHT1x_Init(&Handler);

  while (1)
  {
    SHT1x_ReadSample(&Handler, &Sample);
    printf("Temperature: %f°C\r\n"
           "Humidity: %f%%\r\n\r\n",
           Sample.TempCelsius,
           Sample.HumidityPercent);
  }

  SHT1x_DeInit(&Handler);
  return 0;
}

Without using SHT1x_platform files (AVR)

#include <stdio.h>
#include <avr/io.h>
#define F_CPU 8000000
#include <util/delay.h>
#include "SHT1x.h"

#define DATA_DDR  DDRA
#define DATA_PORT PORTA
#define DATA_PIN  PINA
#define DATA_NUM  0

#define SCK_DDR   DDRA
#define SCK_PORT  PORTA
#define SCK_NUM   1


void SHT1x_Platform_DataDeInit(void)
{
  DATA_PORT &= ~(1<<DATA_NUM);
  DATA_DDR &= ~(1<<DATA_NUM);
}
void SHT1x_Platform_DataConfigOut(void)
{
  DATA_DDR |= (1<<DATA_NUM);
}
void SHT1x_Platform_DataConfigIn(void)
{
  DATA_DDR &= ~(1<<DATA_NUM);
}
void SHT1x_Platform_DataWriteHigh(void)
{
  DATA_PORT |= (1<<DATA_NUM);
}
void SHT1x_Platform_DataWriteLow(void)
{
  DATA_PORT &= ~(1<<DATA_NUM);
}
uint8_t SHT1x_Platform_DataRead(void)
{
  return (DATA_PIN >> DATA_NUM) & 0x01;
}


void SHT1x_Platform_SckDeInit(void)
{
  SCK_PORT &= ~(1<<SCK_NUM);
  SCK_DDR &= ~(1<<SCK_NUM);
}
void SHT1x_Platform_SckConfigOut(void)
{
  SCK_DDR |= (1<<SCK_NUM);
}
void SHT1x_Platform_SckWriteHigh(void)
{
  SCK_PORT |= (1<<SCK_NUM);
}
void SHT1x_Platform_SckWriteLow(void)
{
  SCK_PORT &= ~(1<<SCK_NUM);
}


void SHT1x_Platform_DelayMs(uint8_t Delay)
{
  for (; Delay; --Delay)
    _delay_ms(1);
}
void SHT1x_Platform_DelayUs(uint8_t Delay)
{
  for (; Delay; --Delay)
    _delay_us(1);
}


int main(void)
{
  SHT1x_Handler_t Handler;
  SHT1x_Sample_t  Sample;

  Handler.DataDeInit    = SHT1x_Platform_DataDeInit;
  Handler.DataConfigOut = SHT1x_Platform_DataConfigOut;
  Handler.DataConfigIn  = SHT1x_Platform_DataConfigIn;
  Handler.DataWriteHigh = SHT1x_Platform_DataWriteHigh;
  Handler.DataWriteLow  = SHT1x_Platform_DataWriteLow;
  Handler.DataRead      = SHT1x_Platform_DataRead;
  Handler.SckDeInit     = SHT1x_Platform_SckDeInit;
  Handler.SckConfigOut  = SHT1x_Platform_SckConfigOut;
  Handler.SckWriteHigh  = SHT1x_Platform_SckWriteHigh;
  Handler.SckWriteLow   = SHT1x_Platform_SckWriteLow;
  Handler.DelayMs       = SHT1x_Platform_DelayMs;
  Handler.DelayUs       = SHT1x_Platform_DelayUs;

  SHT1x_Init(&Handler);

  while (1)
  {
    SHT1x_ReadSample(&Handler, &Sample);
    printf("Temperature: %f°C\r\n"
           "Humidity: %f%%\r\n\r\n",
           Sample.TempCelsius,
           Sample.HumidityPercent);
  }

  SHT1x_DeInit(&Handler);
  return 0;
}