add another co2ampel project

[toast/airingbutler.git] / README.md

diff --git a/README.md b/README.md
index 361be8fab7ab671d19569af47877b363587b63cf..a88b07f988262addcf30a7ca1fb0c5c5fb3f2197 100644 (file)
--- 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