Author: Jonathan Woolf jwool003@ucr.edu
This GPS package is compatible with all NMEA 0183 compliant USB GPS receivers. When called, the gpsData() function connects to the active port, for example "ttyACM0", to read in NMEA sentences and return latitude, longitude, MPH, timestamp in PST, and the date. The function also outputs data to three separate text files. Pos.txt will always store the most recent position of the device, log.txt will maintain a log of position and speed that is updated once per minute, and speed.txt will keep a log that only updates as the device moves.
In the example script, getIPAddress() prints out the IP address of the device, then gpsData(), whithin an infinite loop nested in a try / except block, prints its return statement to terminal. Type 'ctrl c' to guarantee that the port is closed when you end the program.
The final script included is chartPath.py which combines the functionality of gps.py with pygmaps.py to generate an html map which shows the device's journey from point A to point B. Simply run the scipt at your starting location and press 'ctrl c' when you have reached your destination to generate the map.
# Discover which serial port is in use
python -m serial.tools.list_ports
# Navigate to rules.d directory
cd /etc/udev/rules.d
# Create a new rule file
sudo touch my-newrule.rules
# Open the file
sudo vim my-newrule.rules
# Add the following:
#KERNEL=="ttyACM0", MODE="0666"
pip install PYserial
import gps
port = gps.serialPortInit()
gps.gpsData(port)