Silicon Labs / SILABS_RHT

Important changes to repositories hosted on mbed.com

Mbed hosted mercurial repositories are deprecated and are due to be permanently deleted in July 2026.

To keep a copy of this software download the repository Zip archive or clone locally using Mercurial.

It is also possible to export all your personal repositories from the account settings page.

Dependents:   MemLCD-Temperature-Humidity-Demo lab123

You are viewing an older revision! See the latest version

Homepage

Table of Contents

  1. Caution
  2. Usage
  3. Datasheets

Caution

This library targets mbed's asynchronous transfer APIs, so it can only be used in conjunction with platforms supporting these APIs.

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

All wikipages