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The Holux GR-87 is a high performance GPS receiver best on the latest SiRF StarIII chipset perfect for use in all potable and wireless applications. Comes with an detachable external antenna offering excellent reception capabilities along with a very low power consumption. This complete GPS receiver module comes with everything needed to get started with GPS reception in minutes. Capable of operating in a wide range of input voltage 3.3V to 5.5V it can be directly interfaced to both 3.3V and 5V systems directly.Comes with a compatible 5 pin cable for interfacing and an external detachable antenna. Can be used with our external Active Antenna for enhanced superior reception.
Figure 6 - Basic GPS tracking system schematic using an ATMega324 The goal of this project is the bare minimal simplified system that will record GPS coordinates at a set rate into the microcontroller's built in memory so that they can then be played back and viewed on a mapping program like Google Earth. To get the GPS module to communicate with the microcontroller, the hardware serial port (USART) on the AVR ATMega324p is set as a transmitter/receiver for 38400 baud, which is the default serial transmission speed of the GP module on power up. On the 324p, the serial receive pin is on PORTD.2 as shown in the schematic (Figure 6). To communicate with the computer, the serial transmit line on the 324p (PORTD.1) is fed to an RS232 level converter so that the voltage expected by the PC is correct.
Connecting a Parallax GPS module to the Arduino (Adapted from Igor Gonzlez Martn's Spanish language tutorial here .) This tutorial shows how to connect a Parallax GPS module to the Arduino, and how to use Arduino code to read information like date, time, location and satellites in view from the standard NMEA data streams that the module produces. Hardware Connections: The module connects to the Arduino through a 4800 bps TTL-level interface (8 data bits, no parity, 1 stop bit, non-inverted).