User’s Manual
GSM35 19 RTD Finland Oy
Chapter 4
- H
ARDWARE DESCRIPTION
This chapter describes the major hardware building blocks of the GSM35:
•
The GSM wireless modem module
•
GSM antenna considerations
•
SIM card reader
•
UART serial port circuitry
•
Digital I/O
Fig. 4-1 Block diagram of the GSM35
