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I'm developer and I somehow tried today to reverse engineer and take apart a hardware, just after learning that some devices have hardware debugging. First thing to try to know in my understanding of theories I read earlier about taking apart the device was the JTAG, JTAG Connectors, JTAG PINS, but any case how can I identify it through this image? Is it concealed as some suggest that it is possible being concealed? Image link: here it is

note I was unable to upload it here because of size limitations.

Nevertheless while In the device board, I saw that RS232 pins were available. Is it possible to connect it a female USB to RS232 like this one? And then how can I dump firmware or other code?

Thanks,

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