https://github.com/laurenzgamper/scd30

Python library for the Sensirion SCD30 co2, temperature, humidity sensor.
https://github.com/laurenzgamper/scd30

python3 raspberry-pi scd30 sensors

Last synced: 2 months ago
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Python library for the Sensirion SCD30 co2, temperature, humidity sensor.

• Host: GitHub
• URL: https://github.com/laurenzgamper/scd30
• Owner: laurenzgamper
• License: gpl-3.0
• Created: 2019-12-05T10:22:06.000Z (about 5 years ago)
• Default Branch: master
• Last Pushed: 2019-12-05T13:32:05.000Z (about 5 years ago)
• Last Synced: 2024-10-11T09:19:06.532Z (2 months ago)
• Topics: python3, raspberry-pi, scd30, sensors
• Language: Python
• Size: 16.6 KB
• Stars: 3
• Watchers: 1
• Forks: 2
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# scd30

Python library for the Sensirion SCD30 co2, temperature, humidity sensor. 

### I2C Clock stretching

Master needs to support Clock Stretching up to 150ms. The default in Raspbian is too low, we have to increase it:

To set it, download from here:

```

https://github.com/raspihats/raspihats/tree/master/clk_stretch

```

Compile:

```

gcc -o i2c1_set_clkt_tout i2c1_set_clkt_tout.c

gcc -o i2c1_get_clkt_tout i2c1_get_clkt_tout.c

```

execute (add to /etc/rc.local to run on every boot):

```

./i2c1_set_clkt_tout 20000 # for 200ms

```

### Thanks

I borrowed some code and ideas from these two repos:

https://github.com/UnravelTEC/Raspi-Driver-SCD30 (python code, i2c clock stretching)

https://github.com/sparkfun/SparkFun_SCD30_Arduino_Library (code structure, commands)