diff --git a/WACCA_Touch_Protocol.md b/WACCA_Touch_Protocol.md
index dd05b99..20d399d 100644
--- a/WACCA_Touch_Protocol.md
+++ b/WACCA_Touch_Protocol.md
@@ -1,3 +1,21 @@
+# Unit board communcation
+
+## Wiring
+
+```
+┌---------┐
+|? ? ? A G|
+|? ? ? B V|
+└---|_|---┘
+
+A: RS-485 A/-
+B: RS-485 B/+
+V: Vcc
+G: GND
+?: Unknown
+```
+
+This diagram shows the female IDC connector that is present on the ribbon cable with the notch positioned downwards. Connect a 12V power supply to the Vcc and GND pins. To communicate with the wedges connect a RS-485 transceiver to the A and B pins, additionally connect the ground of the transceiver to the GND pin. The unit boards communicate with a baud-rate of 921600. 
 
 ## Command Packet Structure
 
@@ -8,6 +26,8 @@
 For the address the following values are used:
 - Unit Boards -> Sync Board: 0xD0 + Unit Board ID
 - Sync Board -> Unit Boards: 0xE0 + Unit Board ID
+
+The address correlates to the id set on the rotary switch on the unit board.
 #### Command ID
 The following Command ID's are known:
 - 0xA8: Get Unit Board Version
@@ -15,7 +35,7 @@ The following Command ID's are known:
 - 0x94: Set Thresholds
 - 0x90: "Initialize" unit board
 - 0xA1: Poll touch state
-- 0xA3: Poll touch state (Analogue) (Not tested yed)
+- 0xA3: Poll touch state (Analogue) (Untested)
 #### Variable Data
 This contains data, it has a variable length.
 #### Checksum
@@ -75,7 +95,7 @@ The sync board sends:
 The unit boards respond with:
 
 `0xD1 0xA1 0x80 0x00 0x00 0x00 0x04 0x00 0x00 0x00 0x00 0x00 0x00 0x01 0x75 0xF0`
-#### 0xA3 - Poll touch state (Analogue)
+#### 0xA3 - Poll touch state (Analogue) (Untested)
 This command retrieves the touch state from the unit boards.
 The sync board sends: