X-Git-Url: https://git.toastfreeware.priv.at/toast/airingbutler.git/blobdiff_plain/83e8d4a0667b54af00a0525e5fd3dc2bf51eb9e5..075f7c86cd9435e508caf4cb8ba6f3e2e4d058f5:/README.md

diff --git a/README.md b/README.md
index 527406b..a88b07f 100644
--- a/README.md
+++ b/README.md
@@ -5,6 +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