Instructions

User Manual:

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6/12/2019 patricktokeeffe/gps16x-programmer: DIY field programming cable for Garmin GPS16x-HVS

https://github.com/patricktokeeffe/gps16x-programmer 1/1

Usage

Required software is loaded onto a USB drive inside the programmer, but is not present in this

repository. See References below for download links.

1. Turn the GPS unitoff

2. Connect alligator clips to GPS data wires:

Blue - data in

White - data out

3. Connect alligator clips to GPS power wires (or leave connected to existing power supply):

Yellow - enable

Red - power in

Black - power ground

4. Turn the GPS uniton:

For built-in 9V supply, turn switch OFF → ON.

For existing power supply, use established procedure

5. Setup the computer:

Plug USB cable into computer

Install the usb-serial adapter driver, as necessary: CDM21228_Setup.zip

Install the new firmware package: GPS16x_420.exe

6. Right-click SNSRXCFG_330.exe and chooseLaunch as Administrator(the updater program will

silently fail if not launched with admin rights), then connect to the GPS:

ChooseGPS 16xwhen prompted

Setup the serial port underComm→Setup:

Serial Port:look up correct port under Computer > Manage > Device Manager > Ports

(COM & LPT)

Baud: leave asAutoor manually specify38400

Connect to the GPS usingComm→Connect

7. Initiate the firmware upgrade usingConfig→Update Software (F12)

Follow the instructions provided by the prompts

Select the region file provided with the firmware package

Select the updater program provided with the firmware package

Wait

Once the upgrade completes, restart the sensor config program

Failure to restart the sensor config program may result in inability to connect to the GPS

unit.

8. Connect using the sensor config tool and verify settings match intended values.

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