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        "author": "Stefan Agner",
        "author_email": "stefan@agner.ch",
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            "License :: OSI Approved :: MIT License",
            "Programming Language :: Python :: Implementation :: MicroPython"
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        "description": "# Sensirion SCD30 CO\u00b2 Sensor I2C driver for MicroPython\n\nSensirion SCD30 is a CO\u00b2, Humidity and Temperature sensor on a module. This is\na I2C driver written in Python 3 for MicroPython.\n\n## Getting Started\n\n### Prerequisites\n\n* Sensirion SCD30 Sensor Module\n* MicroPython board with I2C interface\n\n### Wiring\n\nWire the I2C bus to the I2C bus on your MicroPython board. This is an example\nusing the Pyboard D:\n\n| Pyboard       | SCD30         |\n| ------------- |---------------|\n| X15 (3V3)     | VDD           |\n| X14 (GND)     | GND           |\n| X9            | TX/SCL        |\n| X10           | RX/SDA        |\n\n### Usage\n\nThis example reads the measurements in a continous loop:\n\n```\nimport time\nfrom machine import I2C, Pin\nfrom scd30 import SCD30\n\ni2cbus = I2C(1)\nscd30 = SCD30(i2c, 0x61)\n\nwhile True:\n    # Wait for sensor data to be ready to read (by default every 2 seconds)\n    while scd30.get_status_ready() != 1:\n        time.sleep_ms(200)\n    scd30.read_measurement()\n```\n\nNote that the CO\u00b2 sensor needs some time to stabilize. Therefor the sensor\nshould be kept powered to achieve a reasonable measurement interval (e.g. <5\nminutes). To save power the sensors measurement inverval can be tweaked. See\nalso the [Low Power Mode for SCD30](https://docs-emea.rs-online.com/webdocs/16c9/0900766b816c9dc7.pdf)\napplication note.\n\n### Calibration\n\nThe CO\u00b2 sensor has two modes of calibration: FRC (Forced Recalibration) or ASC\n(Automatic Self-Calibration). This only describes the former.\n\nEssentially the sensor is already calibrated at factory. However, when setting a\nnew measurement interval recalibration might be necessary. The process is to\nbring the sensor into a controlled environment (e.g. outside) and set the known\nvalue at that environment (e.g. 400ppm). From what I understand ASC does\nessentially the same, just assumes that the lowest values over a certain periode\nare \"outside values\"...\n\nAlso note that the temperature sensor suffers from heating effects on the PCB.\nWhen the sensor operates in 2 second interval the heating is about 3\u00b0C. I\nusually run the sensor at 30 seconds interval and observed a heating of 2\u00b0C. The\noffset is subtracted from the measured temperature! To set a new offset, take\nthe old offset into account!\n\n## Built With\n\n* [MicroPython](http://micropython.org/)\n* [SCD30 Sensor Module](https://www.sensirion.com/en/environmental-sensors/carbon-dioxide-sensors-co2/)\n\n## License\n\nThis project is licensed under the MIT License - see the\n[LICENSE](LICENSE) file for details",
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        "keywords": "scd30,co2,temperature,humidity,micropython,i2c",
        "license": "MIT",
        "maintainer": "Stefan Agner",
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