====== Whitehouse Lock ======

=== Foreløbig indkøbsliste ===
  Låseblik:
    Abloy EL412 

  Strøm:
    2x 12v lader (fra biltema)
    2x 12v blyakkumulator (fra biltema)
    Noget sikring til batteri + sikringsboks

  Arduino:
    1x Arduino
    1x Strøm til Arduino (24v -> 5v)
    1x Prototyping shield til Arduino

  Kommunikation:
    4x RS485 dil-pakker (MAX487) OK
    1x D-sub 9 hun OK

  Dør og bipper:
    2x MOS-FET RFD14N05 + det løse

  Adgangskontrol:
    2x RFID-læser til Arduino
    1x Matrix Keypad OK 
    2x RGB-lysdiode OK
    1x Bipper OK, bruger den fra nuværednde installation
    2x Kasse OK

  Styring:
    1x Søkris net4801
    1x VT220 Terminal
    1x USB RFID
    1x Strømstik
    
=== RS485 communication ===

Example implementation http://pskillenrules.blogspot.com/2009/08/arduino-and-rs485.html

The MAX487 chip only allows half-duplex. This means that the receiver and transmitter must switch between RX and TX mode internally as well as on the enable pins on the level-converter.

The protocol will be [[wp>Modbus|Modbus RTU]] for which many [[http://en.wikipedia.org/wiki/Modbus#Open-source_software|implementations]] exists. The server ("grisen") will be the master.

=== Bus connection ===
Pin out for the [[http://en.wikipedia.org/wiki/Modular_plug#8P8C|8P8C modular plug]] socket in the server box ("Grisen").

^**Position**^ **Use**			^ **Colour code for EIA-568-B** ^
|Pos. 1	| ++ (12 V dc)		| Orange/white	|
|Pos. 2	| ++ (12 V dc) 		| Orange	|
|Pos. 3	| --  (Common)		| Green/white	|
|Pos. 4	| "X-"/inverting	| Blue		|
|Pos. 5	| "X+"/non-inverting	| Blue/white	|
|Pos. 6	| -- (common)		| Green		|
|pos. 7	| Not connected		| Brown/white	|
|pos. 8	| Not connected		| Brown		|

The Cat5e cable going to the front door is wired by the  [[http://en.wikipedia.org/wiki/TIA/EIA-568-B#Wiring|EIA-568-B]] colour code, whereas the other cables in the structured cabling uses [[http://en.wikipedia.org/wiki/TIA/EIA-568-B#Wiring|EIA-568-A colours]].


=== Registers ===
The door-arduino has the following registers:
  1. status
  2. rfid
  ...
  x. pincode1-4