Silicon Labs / SILABS_RHT

This is a library to read out sensor values from Silicon Labs' si70xx-range of relative humidity and temperature sensors.

Dependents:   MemLCD-Temperature-Humidity-Demo lab123

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Table of Contents

  1. Usage
  2. Datasheets

Usage

Include mbed low-power to use this driver

#include "mbed.h"
#include "SILABS_RHT.h"
 
I2C sensorI2C(PD6, PD7); //PD6=SDA, PD7=SCL
silabs::SILABS_RHT rhtSensor(&sensorI2C);
 
volatile bool busChecked = false;
 
void respondedCallback( void ) {
    busChecked = true;
}

int main() {
    rhtSensor.check_availability(si7021, respondedCallback);
    while(busChecked == false) sleep();
    
    busChecked = false;
    rhtSensor.measure(si7021, respondedCallback);
    while(busChecked == false) sleep();

    if(rhtSensor.get_active()) {
        printf("Temperature: %d.%03d degC\n", rhtSensor.get_Temperature()/1000, rhtSensor.get_Temperature()%1000);
    } else {
        printf("No sensor found\n");
    }

    while(1) sleep();
}

Datasheets

http://www.silabs.com/products/sensors/humidity-sensors/Pages/si7013-20-21.aspx

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