Waveshare SIM7600 Series Manual page 8

Remove the case, assemble the GPS antenna and replace it and close.
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When testing,You should set the receiver of GPS antenna in outside and please
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test it in sunny day., Power on and waiting for several minuts to get the postion;
2、AT Commands for GPS
Commands and test result：
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AT+CGPS=1 //Open GPS
AT+CGPSINFO //Print GPS information to serial port
AT+CGPS=0 //Close GPS