I've been slowly working on getting into the workings of a set-top box. I hit a snag when the firmware that it downloads is encrypted. I managed to find some pictures of the circuit board (but haven't opened up my device yet) and I have been reading up on communicating over the on-board serial port. I have zero experience with this, other than what I've read on http://devttys0.com and http://jcjc-dev.com/ and various other sites.

So my question is this - Since I'm such a newbie at this, is anyone willing to look at these pictures and help me figure out where a serial port might be hidden?

Pictures @ https://www.dropbox.com/sh/qzd2jpjlv1ieehu/0Am6ttruYe

Any thoughts? Thanks for your time!

  • Since asking this question I managed to get into the box via command entry via typing $(command) in a Wifi SSID/password entry location. So thankfully I don't need to find the serial ports (for now). Thanks for your answer, Jonas, I'll happily accept your answer!
    – justin
    May 27, 2016 at 19:31

1 Answer 1


Look for .1 Inch spaced pads or holes, at least three contacts will be in a row (as you need RX, TX and GND). At a glance I can't find a port in the photos. You should try to get some really high resolution top and bottom pictures.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.