User's Manual

SIM345 EVB User Guide
SIM345-EVB_UGD_V1.02 15.02.2008
12
Auxiliary serial port (UART2):
Pin Signal I/O Description
2 RXD2 O Receive data
3 TXD2 I Transmit data
5 GND GND
3.6 Operating Status LED
Pin Signal Description
1 Flash LED
Network status indication LED
2 Power light
VBATT power supply status
indication
Figure 10: Flash LED
Working state of Flash LED as list:
State Module function
Off Module is not running
Permanent on
Module does not find the network
60ms On/ 3000ms +50%Off
Module find the network
60ms On/ 852ms +50% Off
GPRS communication