Clarify that deviceID can be a MAC address too

Author: andersonshatch

README.md

@@ -82,7 +82,7 @@ To automatically setup a battery sensor:
 
 ## Parameters
 
-`<deviceID>` has format `RISEnnn` and cannot be changed
+`<deviceID>` has format `RISEnnn` or the device's MAC address in lowercase, with the colon's stripped out and cannot be changed
 
 `<deviceName|slugified>` will be the device name (as configured in the app) with spaces replaced by underscores
 
@@ -157,6 +157,6 @@ Response type: `Device` example:
 
 ## Parameters
 
-`<deviceID>` has format `RISEnnn` and cannot be changed
+`<deviceID>` has format `RISEnnn` or the device's MAC address in lowercase, with the colon's stripped out and cannot be changed
 
 `<position>` should be an integer between 0 (closed) and 100 (open)