The eth_rem_dev_weatherstation software expects the ADC channels to be connected as follows

Addon board connector CONN2 ---- Microcontroller pin on ethernet board

GND                         ---- GND 
CONN2-4 out door sensor     ---- ADC0
CONN2-3 in door sensor      ---- ADC1
CONN2-2 air pressure        ---- ADC2
CONN2-1 optional            ---- not used by the software at this moment

The details of this can be seen in file main.c, function print_lcd()