X-Git-Url: https://git.toastfreeware.priv.at/toast/airingbutler.git/blobdiff_plain/2759f53841312464c0b448f1cf442ff944490ab1..a547ba7786273c5fdbbd351a4b65107f63cb068d:/README.md

diff --git a/README.md b/README.md
index 216535b..a88b07f 100644
--- a/README.md
+++ b/README.md
@@ -8,6 +8,7 @@ MH-Z19b CO2 sensor
 * 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