Si7006/13/20/21 temperature and humidity sensors¶
Driver for the Si7006/13/20/21 temperature and humidity sensor.
This driver provides [S]ensor [A]ctuator [U]ber [L]ayer capabilities.
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enum
@157
¶ - SI70XX_OK
- All OK.
- SI70XX_ERR_NODEV
- No valid device found on I2C bus.
- SI70XX_ERR_I2C
- An error occured when reading/writing on I2C bus.
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int
si70xx_init
(si70xx_t * dev, const si70xx_params_t * params)¶ Initialize and reset the sensor.
Parameters
dev: device descriptor params: initialization parameters Return values
- SI70XX_OK on successful initialization
- -SI70XX_ERR_NOI2C on I2C initialization error
- -SI70XX_ERR_NODEV on device test error
- -SI70XX_ERR_I2C on I2C bus error
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uint16_t
si70xx_get_relative_humidity
(const si70xx_t * dev)¶ Read the relative humidity from the sensor.
Uses clock streching.
Parameters
dev: device descriptor Return values
- relative humidity in centi-percent (times 100)
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int16_t
si70xx_get_temperature
(const si70xx_t * dev)¶ Read the current temperature from the sensor.
Uses clock streching.
Parameters
dev: device descriptor Return values
- current temperature in centi-degrees Celsius (times 100)
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void
si70xx_get_both
(const si70xx_t * dev, uint16_t * humidity, int16_t * temperature)¶ Read the relative humidity and temperature from the sensor.
Uses clock stretching.
Parameters
dev: device descriptor humidity: pointer to relative humidity (in centi-percent) temperature: pointer to temperature (in centi-degrees Celsius)
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uint64_t
si70xx_get_serial
(const si70xx_t * dev)¶ Read the sensor serial number.
Parameters
dev: device descriptor Return values
- sensor serial number
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uint8_t
si70xx_get_id
(const si70xx_t * dev)¶ Read the sensor id, to identifier the sensor variant.
Parameters
dev: device descriptor Return values
- device id
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uint8_t
si70xx_get_revision
(const si70xx_t * dev)¶ Read the firmware revision of the sensor.
Parameters
dev: device descriptor Return values
- sensor firmware revision number
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struct
si70xx_params_t
¶ Device initialization parameters.
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i2c.h::i2c_t
i2c_dev
¶ I2C bus the sensor is connected to.
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uint8_t
address
¶ sensor address
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struct
si70xx_t
¶ Si70xx device descriptor.
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si70xx_params_t
params
¶ Device parameters.
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si70xx_params_t