9. GSM Module Connections
1
Operating voltage connection
2
Temperature sensor input "T1" and "T2"
3
Analogue input "ADC"
4
Digital inputs "IN1" and "IN2"
5
"Incall" output
6
"SMS1" output
7
"SMS2" to "SMS4" output
8
"TMP1" to "TMP4" output
9
"PWM" output
10 USB Connection
11 Connection for GSM aerial
60
Figure 1