User Manual

Smart Machine Smart Decision
SIM7100_Hardware_Design_V1.02 2015-06-16
antenna characteristic, and VDD can be shut down to avoid consuming additional current when not
being used.
GNSS can be used by NMEA port. User can select NMEA as output through UART or USB.
NMEA sentences are automatic and no command is provided. NMEA sentences include GSV, GGA,
RMC, GSA, and VTG. Before using GNSS, user should configure SIM7100 in proper operating
mode by AT command. Please refer to related document for details. SIM7100 can also get position
location information through AT directly.
Note: GNSS is closed by default, it could be started by AT+CGPS. The AT command has two
parameters, the first is on/off, and the second is GNSS mode. Default mode is standalone mode.
AGPS mode needs more support from the mobile telecommunication network. Please refer to
document [24] for more details.