Contiki-NG

Driver for the SHT21 temperature and relative humidity sensor. More...

#include "dev/i2c.h"
#include "dev/sht21.h"
#include "lib/sensors.h"

Go to the source code of this file.

Macros

SHT21 address
#define SHT21_ADDRESS   (0x40)
 
SHT21 register addresses and values
#define SHT21_USER_REG_READ   (0xE7)
 
#define SHT21_USER_REG_WRITE   (0xE6)
 
#define SHT21_USER_REG_RESERVED_BITS   (0x38)
 
#define SHT21_TEMPERATURE_HM_CMD   (0xE3)
 
#define SHT21_HUMIDITY_HM_CMD   (0xE5)
 
#define SHT21_TEMPERATURE_NHM_CMD   (0xF3)
 
#define SHT21_HUMIDITY_NHM_CMD   (0xF5)
 
#define SHT21_RESET_CMD   (0xFE)
 
#define SHT21_STATUS_MASK   (0xFC)
 
#define SHT21_RESOLUTION_12b_14b   ((0 << 7) | (0 << 0))
 
#define SHT21_RESOLUTION_8b_12b   ((0 << 7) | (1 << 0))
 
#define SHT21_RESOLUTION_10b_13b   ((1 << 7) | (0 << 0))
 
#define SHT21_RESOLUTION_11b_11b   ((1 << 7) | (1 << 0))
 
#define SHT21_BATTERY_ABOVE_2V25   (0 << 6)
 
#define SHT21_BATTERY_BELOW_2V25   (1 << 6)
 
#define SHT21_ONCHIP_HEATER_ENABLE   (1 << 2)
 
#define SHT21_ONCHIP_HEATER_DISABLE   (0 << 2)
 
#define SHT21_OTP_RELOAD_ENABLE   (0 << 1)
 
#define SHT21_OTP_RELOAD_DISABLE   (1 << 1)
 
SHT21 configuration values
#define SHT21_DEFAULT_CONFIG
 
#define SHT21_USER_CONFIG
 

Detailed Description

Driver for the SHT21 temperature and relative humidity sensor.

Author
Pere Tuset peret.nosp@m.uset.nosp@m.@open.nosp@m.mote.nosp@m..com

Definition in file sht21.c.