Accessories; Evb And Accessory Equipment - SimCom SIM340 User Manual

D: Download switch, turn on or off download function
E: VBAT switch, switch the voltage source from the adaptor or external battery
F: PWRKEY key, turn on or turn off SIM340
G: buzzer
H: expand port, such as keypad port, main and debug serial port, display port
I: MAIN serial port for downloading, AT command transmitting, data exchanging
J: DEBUG serial port
K: hole for fixing the antenna
L: source adapter interface
M: light
N: hole for fixing the SIM340
O: headphones interface

1.2 accessories

A: antenna
B: antenna transmit line
C: headset
D: 5V DC source adapter
E: serial port line

2 EVB and accessory equipment

At normal circumstance, the EVB and its accessory are equipped as the nether figure：