Read and translate AHT20 sensor readings

docs/README

@@ -1,49 +1,10 @@
-## Serial Interface
-
-  Instead of polling for input we use an interrupt vector
-  to write data to a rx ring buffer when it's available.
-
-  We parse commands using a state machine so we can deal
-  with small chunks of characters at a time and spit out
-  the parsed command when the transmission has finished.
-
-  NOTE: System clock frequency should be a multiple of
-  1.8432MHz for perfect USART. This means we would need
-  an external crystal oscillator.
-
-### Supported Commands
+## Supported Commands
 
   - RUN
   - STOP
-  - TEMP <num>
-  - DEWP <num>
+  - TEMP <float>
+  - DEWP <float>
 
   Decimal point for numbers is currently not supported.
   Make sure you have disabled hardware flow control on
   the client side.
-
-### Web Interface Example
-
-  There is an example https and websocket server (written
-  in Python) which serves a simple Javascript shell that
-  controls your box. Its main purpose is to give you a
-  demonstration on how you can write a custom bridge or
-  interface.
-
-  Check out the directory "/opt/webgui" under the project
-  root. You may need to run the following command to load
-  optional submodules if you can't see the webgui folder:
-
-    $ git submodule update --init
-
-  First you need to generate a self signed certificate to
-  ensure SSL encryption. Run the following command in the
-  webgui root directory:
-
-    $ ./configure
-
-  To manually start the server you can use the Makefile
-  (but it's recommended to run the server automatically
-  as a daemon when the host machine starts):
-
-    $ make run