diff --git a/klingel.md b/klingel.md
index 951cd9e..ed99405 100644
--- a/klingel.md
+++ b/klingel.md
@@ -2,7 +2,7 @@
 title: Door bell
 description: 
 published: 1
-date: 2024-03-02T08:47:43.523Z
+date: 2024-03-03T16:06:03.702Z
 tags: 
 editor: markdown
 dateCreated: 2024-03-02T02:22:57.232Z
@@ -10,11 +10,12 @@ dateCreated: 2024-03-02T02:22:57.232Z
 
 
 # Requirements
-- using Bluetooth or WiFi
+- using Bluetooth or WiFi or Zigbee
 - forwarding ringing of door bell
 - opening of door
 - Home Assistant connection
 - smartphone app?
+- 
 
 
 # Current system
@@ -41,4 +42,25 @@ https://forum.arduino.cc/t/wlan-klingel-mit-esp8266-fur-fritzbox/589769
 
 ===https://www.panbachi.de/smarte-tuerklingel-alte-sprechanlage-smart-machen/===
 
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