X-Git-Url: https://git.toastfreeware.priv.at/toast/airingbutler.git/blobdiff_plain/97fab77fc19822b6a4768a58ef1fda1b7c89f6f7..da620b868bf15181d2bf66c14d10eb5a21799991:/README.md

diff --git a/README.md b/README.md
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--- a/README.md
+++ b/README.md
@@ -5,5 +5,11 @@ 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)
+* https://git.unhb.de/smash/co2ampel
+
+* fancy LCD with buttons:
+  + https://www.adafruit.com/product/772
+  + https://learn.adafruit.com/rgb-lcd-shield