Update LED.MD

LED.MD

-LED  
-
-All LEDs are in fact 2 LED (one red and one green) and seems to be connected to separated pins from the controller, or at least addressed by the controller like this
+All LEDs are in fact 2 LED (one red and one green) and seems to be connected to separated pins from the controller, or at least can be addressed by the controller following this addresses design:
 
+```
 LED 1 (r) = 1  
 LED 1 (g) = 2
-
+```
+```
 LED 2 (r) = 3  
 LED 2 (g) = 4
-
+```
+```
 LED 3 (r) = 5  
 LED 3 (g) = 6
+```
+
+There is no zero LED    
+
+the commands to address the LED status is 0x1B 0x4C _STATUS_  
+
+_STATUS_ byte is divided in two parts:  
+ 4 high bits are used to define the LED id,  
+ 1 low bit is used to define the status (on/off)  
 
+So Led's can controlled with the following (pseudo-c) code:
+```
+#define     LED_STATUS_ON               0x01
+#define     LED_STATUS_OFF              0x00
 
+#define     LED_1_RED                   0x10
+#define     LED_1_GREEN                 0x20
+#define     LED_2_RED                   0x30
+#define     LED_2_GREEN                 0x40
+#define     LED_3_RED                   0x50
+#define     LED_3_GREEN                 0x60
 
+void SetLed(unsigned char ledid,unsigned char status)
+{
+    unsigned char cmd[3];
 
-the commands to address the LED status is 0x1B 0x4C _status_  
+    cmd[0] = "\x1b";
+    cmd[1] = "\x4c";
+    cmd[2] = (unsigned char) (ledid + status);
 
-Status byte was divided in two part 4 high bits define the LED id, and 4 low bits define 
+    SerialPtr_writebuffer(cmd,3);
+}
 
 
+SetLed(LED_1_GREEN, LED_STATUS_ON);
+```
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