32 lines
1.1 KiB
Plaintext
32 lines
1.1 KiB
Plaintext
What: /sys/bus/i2c/devices/<busnum>-<devaddr>/pressure0_input
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Date: June 2010
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Contact: Christoph Mair <christoph.mair@gmail.com>
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Description: Start a pressure measurement and read the result. Values
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represent the ambient air pressure in pascal (0.01 millibar).
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Reading: returns the current air pressure.
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What: /sys/bus/i2c/devices/<busnum>-<devaddr>/temp0_input
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Date: June 2010
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Contact: Christoph Mair <christoph.mair@gmail.com>
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Description: Measure the ambient temperature. The returned value represents
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the ambient temperature in units of 0.1 degree celsius.
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Reading: returns the current temperature.
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What: /sys/bus/i2c/devices/<busnum>-<devaddr>/oversampling
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Date: June 2010
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Contact: Christoph Mair <christoph.mair@gmail.com>
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Description: Tell the bmp085 to use more samples to calculate a pressure
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value. When writing to this file the chip will use 2^x samples
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to calculate the next pressure value with x being the value
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written. Using this feature will decrease RMS noise and
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increase the measurement time.
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Reading: returns the current oversampling setting.
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Writing: sets a new oversampling setting.
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Accepted values: 0..3.
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