You know a piece of tech is going to be fun to take apart when it makes you go buy a new set of bits just to be able to open it
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@[email protected] can I see your bits?
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a set of Torx Security 5-point Star bits are on the way
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@puppygirlhornypost lewd!
also, no. they're still in the mail
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King Calyo Delphireplied to Foone🏳️⚧️ last edited by
@foone Why in the everloving fuck do these exist when torx is right fucking there
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@foone including one for screws that big? What are they numbering it?
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Foone🏳️⚧️replied to King Calyo Delphi last edited by
@dragonarchitect I suspect the company that made this device was trying to keep people from opening it.
naturally I'm not gonna let that stop me
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@marado TS20/TS25
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@foone could these be bypased with like, a flat screwdriver wedged betweeen the lobes and the pin, or would the torque required make such behavior impractical?
and like probably damaging to the screwdriver I guess
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@Loosf I gave it a try, but nope. I think they're really really in there.
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I'M IN.
More pictures later, I gotta go take someone to the doctor, but for now... Why design your product to be waterproof when you can just glue some silica packets in there?
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OKAY so this is a Lyft BIT041B, e-bike location and communications module.
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After I bought the right screw bits, I'm in. Obviously this thing is going to be heavy on communications, so we've got a bunch of comms chips.
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Opening it like a book reveals the battery, a bunch of wires, a GPS module, and the other side of the PCB. It's got another big chip and a SIM card holder.
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That GPS module is a VCU GNSS Rev A, by Lyft. I'm really surprised they made their own module for this, you can get something just like this off-the-shelf. This was hotglued in, btw.
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That chip is a Quectel LC79D: Dual-band, multi-constellation GNSS module.
It's got support for GPS (USA), Galileo (EU), GLOSNASS (Russia), BeiDou (China), IRNSS (India), and QZSS (Japan). -
Graham Sutherland / Polynomialreplied to Foone🏳️⚧️ last edited by
@foone the presence of two separate 10-pin tag connect debug headers is interesting. at least they tell you the cable part number you need (TC2050-IDC-NL). usually the 10-pin ones are for fairly big FPGAs but I'm guessing this is more likely to be an MSP430 under the hood?
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The big chip on the main board is another Quectel chip, an EG21-G. That's an LTE module, with support for LTE/UTMS/HSPA+/GSM/GPRS/EDGE.
It has another integrated GNSS chip.
wait what? This thing has two GPS modules!? -
our other Clearly RF Chip is this Espressif ESP32-s2-mini-1.
This does Wifi (b/g/n). -
And we've got a winbond W25Q256JV. That's a 32 megabyte SPI chip.
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Erin 💽✨replied to Graham Sutherland / Polynomial last edited by
@gsuberland @foone Hmm, I see a Quectel modem (presumably ARM), an ESP32, and one of the headers is labeled “NRF DBG” which would imply there’s a Nordic chip in there somewhere although I don’t see that