add options, allow passing SMC key

README.md

@@ -38,15 +38,37 @@ clib install lavoiesl/osx-cpu-temp
 ### Options
 
 * Output
-    * `-c` Display CPU temperature (Default).
-    * `-g` Display GPU temperature.
+    * `-c [key]` Print CPU temperature, optionally providing the SMC key.
+    * `-g [key]` Print GPU temperature, optionally providing the SMC key.
     * `-a` Display ambient temperature.
     * `-f` Display fan speeds.
+    * `-t key` Print temperature value of given SMC key.
+    * `-r key` Print raw value of given SMC key.
 * Format
     * `-C` Display temperatures in degrees Celsius (Default).
     * `-F` Display temperatures in degrees Fahrenheit.
     * `-T` Do not display the units for temperatures.
 
+### Explore keys
+* see https://github.com/acidanthera/VirtualSMC/blob/master/Docs/SMCKeys.txt
+* see https://app.assembla.com/wiki/show/fakesmc
+
+Print the raw value of any key, if it exists
+```shell script
+osx-cpu-temp -r '#KEY' # number of keys
+osx-cpu-temp -r TC0P # CPU proximity sensor
+```
+
+### Explore keys
+* see https://github.com/acidanthera/VirtualSMC/blob/master/Docs/SMCKeys.txt
+* see https://app.assembla.com/wiki/show/fakesmc
+
+Print the raw value of any key, if it exists
+```shell script
+osx-cpu-temp -r '#KEY' # number of keys
+osx-cpu-temp -r TC0P # CPU proximity sensor
+```
+
 ## Maintainer
 
 Sébastien Lavoie <[email protected]>