Table of Contents

GPS receiver GlobalSat MR350S4 driver

Description

This driver is design to allow communication with the MR350S4 (TTL/UART) GPS receiver through the ezeio MkII's SDI-12 serial port.


Configuration settings (center panel)

Name - The name is up to the user. Our suggestion is to choose a naming convention that makes the viewing the device list intuitive. Such as referring to the sensor and/or application. Keep the name short as it will be combined with the register name to create the default “Field” name (if added to “Fields”)

Active Check box - Check this box and “Save changes” to run the driver. The driver program can be suspended by unchecking the box and clicking on “Save changes”.

User Notes - This space can be used to store information specific to the device, such as: location, wiring, scaling, etc.

eze System Notes - In this space we provide: wiring instructions, product image, product details.


Sensitivity - Use the drop-down menu to select the acceptable level of accuracy. Precise location only, Normal precision or Accept low signal. If horizontal accuracy falls below the selected level of precision the driver status will indicate an “App error”.

Timeout - Use the drop-down menu to select how long after the last time of fix (30s, 1min, 2min, or 10min) before indicting an “App error”.


Status & Registers (right panel)

Device Status

Driver info - Typically this is the name from the program file

Driver updated/version - Date loaded or updated and the version of the driver

Battery & Signal - Signal indicates the progress through the script. If driver fails to operate, signal number indicates progress

Driver status - Color and text of status bubbles give a quick visual reference of Communication, Operation, and Application

Communication - Com count indicates number of successful and unsuccessful data packets received


Available registers

  1. Time of last fix - Gives the time of the last location calculation. Time of last fix should be within seconds of current UTC time.
  2. Satellites in use - The number of satellites currently in view / utilized by the receiver.
  3. Latitude - North-South coordinate
  4. Longitude - East-West coordinate
  5. Elevation - Approximate height relative to sea level, given in meters
  6. Horizontal accuracy - Expressed as dilution of precision (DOP). In this metric readings of less than 1 are ideal and greater than 20 are poor.
  7. Speed - Speed of travel is given as meters per second.
  8. Course - Current direction of travel is given as degrees. Tip: Use “Display format in view” option “Degrees as direction” to display as compass direction. Example: 245 = Southwest