
2.2 LED indicators
Logo
LED name
Description
M
GSM/GPRS status
indicator
Green LED on: GSM/GPRS connection
status
Green LED blinking: Boot completion
status
Green LED off: Idle status
S
GPS status indicator
Orange LED on: GPS position fixed
Orange LED blinking: During GPS signal
reception
2.3 Connect 1
Please refer to the following table to understand the function
of each pin at UART port.
Pin
Number
Description
A
Configuration Serial port RXD1
(only for update)
B
Digital input 3 IN3,which is negative
trigger
C
GND
D
Configuration Serial port TXD1
(only for update)
A
C
B
D