update docs

docs/_sidebar.md

@@ -14,3 +14,6 @@
   - [Timer](timer.md)
   - [Icons](icons.md)
   - [Sounds](sounds.md)
+
+- MQTT
+  - [Commands](mqtt.md)

docs/custom.md

@@ -1,7 +1,7 @@
 # Custom Pages & Notifications
 
 With AWTRIX Light, you can create custom pages or notifications to display your own text and icons.
-Simply send a JSON object to the topic "awtrixlight/custom/[page]" where [page] is a number from 1-10.
+Simply send a JSON object to the topic "awtrixlight/custom/[page]" where [page] is a the name of your page (without spaces).
 
 ## JSON Properties
 

docs/mqtt.md

@@ -0,0 +1,19 @@
+# MQTT Commands
+
+### Switch to app  
+**Topic**  
+`[PREFIX]/switch`  
+**Payload**  
+`{"name":"time"}`
+
+Build-in app names are
+- `time`
+- `date`
+- `temp`
+- `hum`
+- `bat`
+
+For custompages you need to call the name you set in the topic:
+if 
+`[PREFIX]/custom/test` is your topic, 
+then `test` is the name