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Simple CO2 meter and logger (TTGO+MH-Z19) — image 1
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Simple CO2 meter and logger (TTGO+MH-Z19)

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case for co2 meter, it has space for 1x 18650 battery, TTGO T-Display and MH-Z19 sensor

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Creative Commons — Public Domain

I only made this case, original build instructions are here

https://emariete.com/en/meter-co2-gadget/