we basically wanted to control te home appliances thru a GSM modem whichn is actually connected to the serial port of the pc.so then we thought if a pc was used then it wud nt be portable so we wanted to shift to the so called microcontroller to actually interface it with the uart and eprom(wat wud u advice shud it be eprom or eeprom????),so we want to connect the whole setup to the gsm modem and operate from any where in the world,can it be done this way or is there any easy way out?????