Connection for letATworkII:

PORTA.2  -- HUMIDITY SENSOR ---- PORTF.0(adc0)
PORTA.3  -- 50K Resistor    ---- PORTF.0(adc0)

Jumper Setting
Aref Internal
AVCC Internal
AGND Internal

LCD --   letATworkII 
GND --   GND
VCC --   VCC
VLC --   GND
RS  --   PORTC.0
RD  --   PORTC.1
EN  --   PORTC.2
D4  --   PORTC.4
D5  --   PORTC.5
D6  --   PORTC.6
D7  --   PORTC.7