Recommended hardware for temperature readings

Nerves Forum Nerves Questions / Help
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Hey gang

I wonder what a good outdoor-reliable temperature sensor is that is comfortable to integrate with Nerves. I need to start monitoring temperature in the new green house soon enough and I have plenty of devices and some enclosures. But I’ve heard the DHT-22 is not particularly great?

What was recommended in the Weather Station book? What else is there to consider?

@fhunleth I know you’ve dealt with a temperature sensor or two in your day. Open to anyone’s opinion though :slight_smile:

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The Bosch BME280 is a solid choice and there is already a library for it: GitHub - lucaong/elixir_bme680: An Elixir library to interface with the BME680 (and BME280) environmental sensor. The BME680 also measures gas concentration but the library is compatible with both

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nice, thank you!

so gas concentration could be used to check CO2 levels in an office as well?

Might need more than one.

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The BME680 takes those sensors to the next step in that it contains a small MOX sensor. The heated metal oxide changes resistance based on the volatile organic compounds (VOC) in the air, so it can be used to detect gasses & alcohols such as Ethanol, Alcohol and Carbon Monoxide, and perform air quality measurements. Note it will give you one resistance value, with overall VOC content, but it cannot differentiate gasses or alcohols.

So no, no real CO2 sensor but an indicator of your general air quality

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Small correction: I meant this library: GitHub - elixir-sensors/bmp280: Use Bosch barometric pressure sensors in Elixir which is also used in the Nerves weather station book

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