tech
boards
quectel-dat - quectel-gps-dat - quectel-GNSS-AT-dat - L86-dat - L76-dat - ED20-dat - BC20-dat - NGS1100-dat - NGS1101-dat - NGS1102-dat - NGS1103-dat
composite function board
simcom-dat - A7670-dat - SIM7080-dat - SIM7000-dat - SIM868-dat - SIM808-dat - SIM7600-dat
Common Locating Issues
Network Dependency
A-GPS (Assisted GPS) - AGPS-dat relies on Wi-Fi or mobile data to speed up location locking. If no internet is available, it may take much longer.
Poor mobile signal or no Wi-Fi can delay GPS start.
Cold Start vs Warm Start
If you haven't used GPS in a while or have moved a long distance since last use, your GPS might need a "cold start," which takes longer.
location by A7670-dat
turn on GPS functions
AT+CGNSSPWR=1
turn on GPS power by GPIO pin 4:
AT+CGDRT=4,1
AT+CGSETV=4,1
wait until GPS feedback READY!
+CGNSSPWR: READY!
foward signal to GPS NEMA serial port
AT+CGNSSTST=1
OK
GPS NEMA output Port
SimTech HS-USB NMEA 9011 (COM346)
设备类型：端口(COM和LPT)
制造商：SimTechIncorporated
位置：0000.001d.0000.001.002.002.000.000.000
test tools NEMA
u-center_v8.22.exe === search online
SCH
arduino shield with neo-6-dat + SD-dat
