Example Arduino GPS Checker
Overview
This script is designed to run on an Arduino device and get the current GPS location in a loop. This script communicates over the DN/DP data port, that is also used to power the board through the USB connection.
Functions
Communicates over the USB connection for easy set-up
Handshake in an Arduino environment
Gets current GPS location
Example
void setup() {
// start serial port at 115200 bps:
// Serial is for communicating through the power/data usb port on the board
// Serial1 is for communicating through the tx/rx pins
Serial.begin(115200, SERIAL_8N1);
// Serial1.begin(115200, SERIAL_8N1);
while (!Serial) {
; // wait for serial port to connect. Needed for native USB port only
}
// send HLWD to establish contact until receiver responds
establishContact();
}
void loop() {
// if we get a valid byte, read analog ins:
if (Serial.available() > 0) {
// Publish an RGPS query to request the current GPS location
Serial.print("?RGPS_\r");
Serial.flush();
delay(300);
String response = Serial.readStringUntil('\r');
// Do whatever you want with the response here.
}
}
void establishContact() {
while (Serial.available() <= 0) {
// Send a HLWD_ as a handshake
Serial.println("@HLWD_\r");
Serial.flush();
// Delay a little to give time for a response to arrive
delay(900);
// Read a response
String response = Serial.readStringUntil('\r');
// If the response is an ACK then the handshake is returned, break to the main loop
if (response.equals("#ACK_"))
{
Serial.println("Hello World!");
Serial.flush();
break;
}
}
}