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I recently discoverd a very old agenda coumputing vr3 pocket computer and wondered if it was possible to connect it to my pi. But i need to use a cable and have no idea what it is. I'm wondering if it is possible to connect to the headers? (likely not) or, what kind of cable is it enter image description here

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    That looks like a serial cable as for connecting it to the GPIO this should get you started davidhunt.ie/… you can also get a USB to serial adapter like this amazon.com/Tripp-Lite-USA-19HS-High-Speed-supports/dp/… You can probably do a search for the product manual and verify that it is a serial cable – Steve Robillard Mar 13 '16 at 17:57
  • @SteveRobillard I think that RPi's built-in UART will be just fine here, no need for USB-to-UART bridge chip – Alexey Vesnin Mar 13 '16 at 17:59
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    @AlexeyVesnin you are probably correct but with an unknown and proprietary device I would err on the side of caution and add a little insurance for the Pi. also maintaining a good connection with jumper wires can present a hard to track down bug – Steve Robillard Mar 13 '16 at 18:12
  • @SteveRobillard Agreed! – Alexey Vesnin Mar 13 '16 at 18:17
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    RS-232 uses much higher voltage than 3V, it will burn Raspberry in case of direct connection! – edo1 Mar 13 '16 at 21:19

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