Added support notes for 6ie model

thanks to contributions in issue ha-warmup#33

README.md

@@ -140,14 +140,15 @@ After that, import the library, and away we go.
 
 # Status
 
-## Device Versions
-
-Supported models:
-
--   4IE
-
-This is currently the only model that developers and testers have
-available to work on.
+## Supported models
+
+* 4IE
+    - this is the device for which this project was launched, so has reasonable support
+* 6IE
+    - this newer device has shown teething issues here, but seems to work with some caveats
+    - your wifi network SSID length must be <= 32 characters and password <= 15 characters
+    - you cannot set it up as 'living room', but you can choose 'kitchen' and change through the warmup web interface 
+    - please see [6ie Thermostat compatibility issues #33](https://github.com/ha-warmup/warmup/issues/33) for details
 
 ## Supported Features