26 lines
942 B
Text
26 lines
942 B
Text
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Contiki implementation for Bosch Sensortec BME280 sensor.
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BME280 is compact and fast and includes temp, RH, and pressure.
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Chip uses I2C or SPI. This implementation and follow Contiki
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device API and I2C.
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For better performance and less chip warm up and less I2C transactions
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burst read is recommended. Here all T/RH/P is read in one single
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I2C read and kept the measurements have the same time.
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The burst read is stored in struct bme280_mea which accessible from
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the Contiki. Also note that the full chip resolution is available.
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The variables are overscaled to give the app full controlover resolution.
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See bme280.h
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The pressure can be calculated with 32 or 64. The define BME280_64BIT
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controls this. Typically in your project-conf.h
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Implemented according to datasheet Rev 1.1.
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Limitations:
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Implementation implements Weather Mode which uses forced one-shot
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mode no oversampling nor filters and reads all T/RH/P in one read.
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