X-Git-Url: https://git.toastfreeware.priv.at/toast/airingbutler.git/blobdiff_plain/d5424169d832c56ad61cc08b83fd577455d48591..075f7c86cd9435e508caf4cb8ba6f3e2e4d058f5:/README.md

diff --git a/README.md b/README.md
index 361be8f..a88b07f 100644
--- a/README.md
+++ b/README.md
@@ -8,3 +8,8 @@ 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
+  + https://learn.adafruit.com/rgb-lcd-shield