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Low cost receiver 

Prototype 

 

pg. 1 

 

 

Low-Cost SBAS Receiver Design (SkyTraq Venus 838) - 25/02/2020 

This document describes Open Hardware and is licensed under the CERN OHL v. 1.2.

 

You may redistribute and modify this documentation under the terms of the CERN OHL v. 1.2. (

http://ohwr.org/cernohl

) 

This documentation is distributed WITHOUT ANY EXPRESS OR IMPLIED WARRANTY, INCLUDING MERCHANTABILITY, SATISFACTORY QUALITY AND 

FITNESS FOR A PARTICULAR PURPOSE. Please see the CERN OHL v. 1.2 for applicable conditions 

LOW-COST SBAS RECEIVER DESIGN 

(SKYTRAQ VENUS 838) 

 

Table of Contents 

1.

 

COMPONENTS ................................................................................................................................................. 2

 

2.

 

REQUIRED EQUIPMENT .................................................................................................................................... 2

 

3.

 

BUILD PROCEDURE .......................................................................................................................................... 2

 

3.1.

 

3D Printing the Enclosure ......................................................................................................................................................... 2

 

3.1.1.

 

Main Enclosure ............................................................................................................................................................... 2

 

3.1.2.

 

Enclosure Lid .................................................................................................................................................................. 3

 

3.1.3.

 

Charger Tray .................................................................................................................................................................. 3

 

3.2.

 

Preparing the Components ....................................................................................................................................................... 3

 

3.2.1.

 

Attaching Headers to the SkyTraq Venus 838 Evaluation Board .......................................................................................... 3

 

3.2.2.

 

Preparing the Adafruit PowerBoost 1000 .......................................................................................................................... 4

 

3.3.

 

Assembling the Components ..................................................................................................................................................... 4

 

3.3.1.

 

Power Assembly .............................................................................................................................................................. 4

 

3.3.2.

 

HC-06 Connection ........................................................................................................................................................... 5

 

3.4.

 

Configuring the SkyTraq output baudrate .................................................................................................................................. 5

 

3.5.

 

Enabling SBAS on the SkyTraq .................................................................................................................................................. 6

 

3.6.

 

Installing the Components into the Enclosure............................................................................................................................. 6

 

4.

 

SETUP AND OPERATION ................................................................................................................................... 8

 

5.

 

TROUBLESHOOTING ........................................................................................................................................ 8

 

6.

 

CONTACT INFORMATION ................................................................................................................................. 8

 

 

Содержание SKYTRAQ VENUS 838

Страница 1: ...or applicable conditions LOW COST SBAS RECEIVER DESIGN SKYTRAQ VENUS 838 Table of Contents 1 COMPONENTS 2 2 REQUIRED EQUIPMENT 2 3 BUILD PROCEDURE 2 3 1 3D Printing the Enclosure 2 3 1 1 Main Enclosure 2 3 1 2 Enclosure Lid 3 3 1 3 Charger Tray 3 3 2 Preparing the Components 3 3 2 1 Attaching Headers to the SkyTraq Venus 838 Evaluation Board 3 3 2 2 Preparing the Adafruit PowerBoost 1000 4 3 3 Ass...

Страница 2: ...ms no affiliation with the creators and distributors of any of these components These were selected for their availability and relatively low cost Alterations on this design may function with alternative components but the enclosures have been dimensioned with these in mind 2 Required Equipment You will require the following equipment and the skills necessary for their safe operation 3D Printer So...

Страница 3: ...bels to print correctly 3 1 3 Charger Tray This tray is dimensioned to fit the Adafruit PowerBoost 1000 Charger Board Once assembled both this tray and the board will hang upside down from the rail in the Main Enclosure with the USB port exposed externally to allow easy recharging Depending on your 3D printer and settings this will take less than 1 hour to produce 3 2 Preparing the Components 3 2 ...

Страница 4: ...ections necessary to construct the assembly shown in the image to the left The toggle switch should be connected to the header pins labelled EN and GND From there the 2400 mAh LiPo can be connected using the attached plug If this assembly is working correctly the switch should turn the board on and off which will be visible via the power and charge level lights on the PowerBoost 1000 When the swit...

Страница 5: ...uch simpler task to alter the baudrate of the SkyTraq than the HC 06 so that is the recommended method To alter the SkyTraq baudrate you will need to download some drivers and an application to a PC You can find the USB drivers here https www silabs com products development tools software usb to uart bridge vcp drivers And you can find the configuration software data viewer here http navspark mybi...

Страница 6: ...eft you should enable the SBAS system disable Ranging enable the corrections and then enable WAAS From there use the Modify Default PRN section to change the WAAS PRN to 122 the PRN of the Australia and New Zealand SBAS You can now save the configuration It is also recommended to disable position pinning to allow true 1hz or higher output rates and to change the Navigation mode to suit your use ca...

Страница 7: ...the front edge of the SkyTraq board with HC 06 attached you can leave it dangling out for now into the opening of the bottom rails so that it s lined up square ready to be pushed in 3 Push the SkyTraq board in far enough that the Antenna connector is past the opening to the power assembly rail 4 Place the battery slightly into the compartment leaving slack in the wires to line up the SkyTraq board...

Страница 8: ...ve in built support for bluetooth GNSS receivers however some may require the use of a Mock Location sourced from an app that can take a bluetooth receiver input to function properly 5 Troubleshooting The most common issue when constructing this receiver is mis configured baudrate between the HC 06 and the SkyTraq board If they do not match the communications will not work as expected in either di...

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