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GPSDR++ will load but not run on vivid unit

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(@test27)
Posts: 5
Active Member Customer
Topic starter
 

When I run GPSDRPP from the terminal emulator the script continues to recycle the power and shows warnings that GPS STM8 is not connected and tries to initialize the Si5351 and says it is also not connected.

When I start from the applications menu, the GPSDR++ loads fine but will not play.

Do I have a defective VU GPSDR board?

I've Re installed all the software, still not working

See attached picture of script 

This topic was modified 1 day ago by test27
 
Posted : 26/11/2025 4:37 am
(@admin)
Posts: 686
Member Admin
 

The GPS module (M8N), the MCU (STM8) and the clock generator (Si5351) are all connected as I2C devices. If the GPSDR board is not well connected, or it is not powered, the I2C devices do not show up.

You may check my answers in another topic, which tells which devices should appear in which case:

https://www.uugear.com/forums/technial-support-discussion/vu-gpsdr-rtl-sdr-not-detected/#post-1811

You may also download and try this BASH script:

https://www.uugear.com/repo/VU_GPSDR/gpsdr_step_by_step.sh

chmod +x ./gpsdr_step_by_step.sh

./gpsdr_step_by_step.sh

This script will power your GPSDR board, initialize it and then disconnect its power in a step-by-step manner, and it asks you to press a key before each step. This can help you to diagnose the board. If you poost the output of the script here, I can also look into it.

 
Posted : 26/11/2025 6:45 am
(@test27)
Posts: 5
Active Member Customer
Topic starter
 

the first sudo detect is before starting GPSDR++

The next one is after starting GPSDR++

see screenshot attached

 
Posted : 27/11/2025 2:35 am
(@test27)
Posts: 5
Active Member Customer
Topic starter
 

next

 
Posted : 27/11/2025 2:37 am
(@test27)
Posts: 5
Active Member Customer
Topic starter
 

I have disassembled and checked connections visually.

re assembled the unit reloaded all software

still not working What are my options, I'm in the USA California

 
Posted : 27/11/2025 2:43 am
(@test27)
Posts: 5
Active Member Customer
Topic starter
 

Are these units Quality checked at the factory

The Vivid unit has a QC sticker, the SDR unit does not have one

 
Posted : 27/11/2025 2:46 am
(@admin)
Posts: 686
Member Admin
 

Posted by: @test27

the first sudo detect is before starting GPSDR++

The next one is after starting GPSDR++

see screenshot attached

@test27 I could not see the screenshots. You need to save the screenshot as a local file and then attach to the post (one post with one file only).

Alternatively you may upload the screenshot to an image hosting server and post the link here.

 

 
Posted : 27/11/2025 6:19 am
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