HDOP limitation setting of GPS Distance Meter

1. On the home page of boot,press the 【Settings】button to enter the settings interface；
2. Press the▲▼button move to“System setting”；Press the【Enter】button to enter；
3. Press the【Enter】button to the HDOP limitation ;
4. Press ▲▼ button to adjust the value of number；
5. After finishing setting,press the power-off button to exit.
6. Note: Measurements can only be made if the HDOP value is lower than or equal to the set value.

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