Code:
CMCON0 = %00000111 
ANSEL = %00000000 
TRISIO = %00000000 
GPIO = %00000000

MYVAR  VAR BYTE 
 
MAIN:
PAUSE 250
SERIN2 GPIO.0, 16780, [DEC MYVAR] '2400 INVERTED
IF MYVAR = 3 THEN HIGH GPIO.5
PAUSE 250
GOTO MAIN
But if GPIO.0 is connected to the POT it may not work.