This demo shows use of logging GPS data to an SD Card for later review. Has tracked to the GPS satellite, this pin will send a pulse per second. The INT1 is the broke out of the 1PPS output. If not use, please set the jumper to OFF as the following figure. The INT0 is the broke out of the external interrupt pin of GPS module, If the voltage is 5V(Arduino), set the Operation Level Setting switch to (IFLAT32,Leaf maple), set the Operation Level Setting switch to 3.3V.
ROYALTEK GPS INSTALL
When install GPS shield to Arduino, please check the operation