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From: | Mike |
Subject: | Re: [gpsd-dev] Much was accomplished today at Asylum House |
Date: | Sun, 22 May 2016 23:18:53 -0400 |
User-agent: | Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.1.0 |
On 05/22/2016 02:02 AM, Eric S. Raymond wrote
The thing of possible GPSD interest we learned is that the SKU 424254, that no-name GPS HAT from China, has a serious flaw. The trace that should deliver 1PPS from the u-blox module to GPIO05 is *absent*. This is not a simple manufacturing error; we were able to find a link to its schematics and the trace is missing there, too. Which is *weird* because the vendor page advertises that export heavily. After some scope work that would have been utterly beyond my competence (though I am learning) Phil was able to blue-wire the board to do the right thing. I will document this in the Microserver HOWTO and send the vendor a nastygram that leaves them no excuse not to fix it.
Does anyone know if this is a product produced somewhere else too? I also looked at the schematic referenced from the dx.com site and was stymied by the lack of a connection to the header. Even though it clearly stated that is was hooked up. I have ordered through DX many times, typically expecting that most of the stuff is poor clones or counterfeits of someone Else's design. Certainly a cause of frustration if one isn't aware of it.
I forgot to look and see if there was a post in the user forums about this issue. Many times it helps to get attention and let others know there of problems like these.
Mike
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