Flag used library.

[toast/airingbutler.git] / README.md

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@@ -5,5 +5,6 @@ MH-Z19b CO2 sensor
 
 * https://github.com/WifWaf/MH-Z19
 * https://en.ovcharov.me/2019/06/10/carbon-dioxide-sensor-mh-z19b-part-1/
-* https://github.com/crisap94/MHZ19
+* Selected [Arduino Library](https://github.com/crisap94/MHZ19)
 * http://ihormelnyk.com/mh-z19_co2_meter
+* [German Blog about how to use MH-Z19B with Arduino](https://www.blikk.it/forum/blog.php?bn=neuemedien_fb&lang=de&id=1575901160)