HS GPSDLL - Global Positioning System (GPS) DLL Library (NMEA 183)

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Customers using HsGpsDll:

▪ SkyMedia AG (Switzerland)

▪ Clariant Corporation (USA)

▪ UNEB (Brazil)

Download Evaluation Version

Download Documentation

HsGpsDll v1.2
Global Positioning System (GPS) DLL Library

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What's included in HsGpsDll:

License type	Single Developer Source Code License	Company Source Code License
HsGpsDll.dll - Windows DLL (Dynamic Link Library) for use from programs in Visual C, Visual Basic or other languages	Yes	Yes
HsGpsDll.h - HsGpsDll interface file for C includes	Yes	Yes
HsGpsDllCs.dll - Windows DLL wrapper to use from C Sharp .NET programs	Yes	Yes
HsGpsDllManual_v1_1.pdf - HsGpsDll Library User Manual v1.2	Yes	Yes
HsGpsDemoVC - Visual C test application with source code using HsGpsDll.dll	Yes	Yes
HsGpsDemoVB6 - Visual Basic test application with source code using HsGpsDll.dll	Yes	Yes
HsGpsDemoCS - C Sharp .NET Demo application with source code using HsGpsDllCs.dll and HsGpsDll.dll	Yes	Yes
FULL SOURCE CODE in Visual C (plain C style), including core GPS NMEA message processing engine / NMEA sentence parser	Yes	Yes

Features

Interfaces a GPS receiver over COM ports COM1 - COMn (any port number can be used)

To obtain GPS information, HsGpsDll decodes the following sentences of NMEA-183 (National Marine Electronics Association, Interface Standard 0183:
- $GPGGA - geographical position fix data
- $GPRMC - Recommended minimum specific GPS data
- $GPVTG - velocity over ground

Supported EQUIPMENT

Supports any NMEA-183 Compliant GPS device with serial RS232, USB, Bluetooth or IRDA interface, or any physical interface presented by the OS as a COM port

Applications

Navigation
Security
Telematics
Fleet Tracking
Asset Tracking
Any customer applications requiring access to a NMEA-183 compliant GPS receiver

customization

Hillstone Software provides additional services for customization, porting and integration of the library code to better suit the needs of your products

overview

HsGpsDll is a Windows Dynamic Link Library which provides access to any NMEA-183 compliant GPS receiver via a serial communications port.

HsGpsDll is designed for use from Visual C, C++, Visual C Sharp .NET, Visual Basic or other programming languages, capable of calling DLL functions.

HsGpsDll allows a user application to easily read from a GPS device the current GPS position fix and current velocity over ground (speed in kilometers per hour)

GPS position fix obtained via HsGpsDll contains:
Latitude coordinate in degrees, minutes, seconds and direction (South / North)
Longitude coordinate in degrees, minutes, seconds and direction (East / West)
Coordinates in decimal degree format
Fix quality - valid or invalid
Number of satellites in view
Speed in kilometers per hour
Altitude (Mean Sea Level)
UTC date and time

The demo application shows current GPS location on a map provided over internet connection (if available) from Google Maps map server. The map zoom level is adjustable from 16 to 0. The map is updated every 10 seconds if the coordinates of GPS receiver change.

The HsGpsDll library allow a user to configure the settings of the serial communication port to which GPS receiver is connected (COM port number, selectable from COM1 to COM32, speed, data size, number of stop and data bits, parity)

HsGpsDll Software Architecture

HsGpsDll product consists at the top level from HsGpsDll.Dll which provides API to user applications as a standard DLL. Also there is HsGpsDllCs.Dll which is a wrapper to enable C Sharp .NET applications to use HsGpsDll. Internally HsGpsDll.Dll talks to HsGps.lib - core GPS NMEA 183 parsing and decoding component. HsGps.lib interfaces to HsCom.lib - serial communications library. HsGpsDll is supplied with demo applications including source code for Visual C, Visual Basic and C Sharp .NET

how it works

HS GPSDLL continuously reads asynchronous data stream from a serial port and analyses the information to recognize and decode NMEA-183 Protocol sentences. After each message is received it is checked for integrity by comparing the received and the calculated checksum. The NMEA sentence fields are then converted from ASCII values into C structure variables and ready to be retrieved with an API call.

C Sharp .NET demo application with source code is supplied with HsGpsDll:

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