Raspberry Pi with arduino

workup for an asset-tracker

Use Raspberry Pi to connect via usb to Arduino with Grove Shield and Grove GPS sensor

Arduino Uno with Grove - Temerature/Barometer & GPS sensor attached

Grove GPS writes via SoftSerial lib

screen /dev/ttyACM0 9600

The line starting with $GPGGA annotated above has the NMEA data that provides the longitude and latitude and altitude data that is interesting to us.

Arduino talks to pi via usb

GPS.py lines 40 to 44 gets GPS and location information via the python library pynmea

( $todo: add grab Temp, Humidity and Accelerometer data ... )

You will need to signup for Mapquest Developer account and get an API key

export MAPQUEST_KEY=hw26Ajxxxxxxxxxxx

in python3 code gps.py it will call

Mapquest get url to

http://www.mapquestapi.com/geocoding/v1/reverse?key=MAPQUESTKEY&location=40.72817333333333,-73.98259166666666&includeRoadMetadata=true&includeNearestIntersection=true

and returns something similar to

'nearestIntersection': {   'distanceMeters': '151.78865',
                            'label': 'E '
                                    '11th '
                                    'St '
                                    '& '
                                    'Avenue '
                                    'C',
                            'latLng': {   'latitude': 41.72785,
                                            'longitude': -73.982223},
                            'streetDisplayName': 'Avenue '
                                                'C'},
    'postalCode': '10009-4XXX',
    'sideOfStreet': 'L'
}

resources

convert grove gps data to meanigful information https://github.com/Knio/pynmea2

National Marine Electronics (NMEA) Standard

https://www.nmea.org/content/STANDARDS/NMEA_0183_Standard

https://en.wikipedia.org/wiki/NMEA_0183

https://developer.mapquest.com/devblog/