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gauteh / sfy

🌊 A lightweight wave buoy for near-shore deployments.
MIT License
42 stars 6 forks source link

SD-card can become ejected in current configuration #61

Closed gauteh closed 2 years ago

gauteh commented 2 years ago

During sea-trials SD-card got ejected, no messages could be stored to SD, but they were still successfully transmitted over the cellular. Maybe you have some ideas @BenoitLD for how to secure the SD-card during deployment.

jerabaul29 commented 2 years ago

Tough! I think some people 'heat gun glue' SD cards, but then of course harder to take out - maybe possible to read the SD card content through the Artemis instead of extracting the SD card, in which case it could be glued in position?

gauteh commented 2 years ago

Yeah! I was sure there was filesystem issues, so it was a good kind of surprise. Reading through something kind of defies the purpose of making it easy to read in a computer: I'm thinking maybe a thin zip-tie... ?

It is (already) possible to read the storage data over cellular, e.g. if buoy drifts off-shore and pops up again somewhere with network cover.

jerabaul29 commented 2 years ago

Tja, how hard is it really, if let's say there is a tiny bit of firmware that is waiting for USB-C connection and, if connected, 1) provides an index of available records, 2) can dump individual records as CSV over USB? I don't think plugging a USB cable and running a small python script (possibly with a small GUI) would be much more hurdle than popping the SD card and inserting it. But of course I may be wrong :) .

gauteh commented 2 years ago

Difficult if the buoy has been filled with water and the Artemis is a rusty blob :D

On Mon, Jun 6, 2022 at 4:49 PM JR @.***> wrote:

Tja, how hard is it really, if let's say there is a tiny bit of firmware that is waiting for USB-C connection and, if connected, 1) provides an index of available records, 2) can dump individual records as CSV over USB? I don't think plugging a USB cable and running a small python script (possibly with a small GUI) would be much more hurdle than popping the SD card and inserting it. But of course I may be wrong :) .

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jerabaul29 commented 2 years ago

Yes, true ^^ :) . But then if such a bad situation you can take off the hot glue even if it ruins the SD card reader?

But just brainstorming, and being the advocate of the devil, there is certainly something better than hot gluing to be done :) .