GPS module receivers are generally used in smartphones, fleet management systems, military, etc. for tracking or finding location. Global Positioning System (GPS) is a satellite-based system that uses satellites and ground stations to measure and compute its position on Earth.GPS is also known as Navigation System with Time and Ranging (NAVSTAR) GPS.
GPS receiver gives output in standard (National Marine Electronics Association) NMEA string format. It provides output serially on Tx pin with default 9600 Baud rate.
This NMEA string output from the GPS receiver contains different parameters like longitude, latitude, altitude, time, etc. which are separated by commas. Each string starts with ‘$’ and ends with carriage return/line feed sequence.
$GPGGA, 184241.000, 1829.9639,N, 07347.6174, E, 1, 05, 2.1, 607.1, M,-64.7, M, ,0000*7C
Pin Description of GPS Module
- VCC: Power Supply 3.3 – 6 V
- GND: Ground
- TX: Transmit data serially which gives information about location, time, etc.
- RX: Receive Data serially. It is required when we want to configure GPS receiver.
- The GPS chipset is Media Tek MT 3318, 51 Channel.
- Frequency is L1, 1575.42 MHz; C/A Code.
- Protocol : NMEA 0183 v3.01, MTK NMEA Compound.
- UART interface.
- Baud Rate of 9600bps (default).
- Working Temperature : -40 °C to 85 °C.