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SIM Tech SIMCom SIM868 Series User Manual

SIM Tech SIMCom SIM868 Series
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Smart Machine Smart Decision
SIM868_Series_Hardware_Design_V1.06 22 2017-07-13
4. Application Modes of SIM868
4.1. All-in-one Mode
In all-in-one mode, UART2 of GSM is connected with GNSS_UART. Its convenient for communication
between GSM and GNSS, such as control GNSS, firmware upgrade and download EPO data.
As the Figure 6, a 10K resistor should be added between GPIO1 and GNSS_EN pin.
In this mode, GNSS part can be enabled through AT commandAT+C GNSP WR=1and disabled through AT
commandAT+CG NSPWR =0. GSM and GNSSs firmware could be upgraded through UART1 port or USB
with high-speed.
Module
GNSS_RXD
GNSS_TXD
UART2_RXD
UART2_TXD
VRTC
VRTC
MCU
UART1_TXD
UART1_RXD
RXD
TXD
GSM_VBAT
LDO
Adapter
5V
4V
GPS_VBAT
GNSS_EN
OUT
PWRKEY
V_GPS
LDO
R101
10K
GPIO1
USB
Figure 6: All-in-one Mode Diagram
SIMCOM CONFIDENTIAL FILE

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SIM Tech SIMCom SIM868 Series Specifications

General IconGeneral
BrandSIM Tech
ModelSIMCom SIM868 Series
CategoryGSM/GPRS Modules
LanguageEnglish