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Raspberry Pi

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  • yeah i read something about frying the pins only after trying the rs232 pins, so I really hope the pins aren't fried. I do have another pi, so will try the feedback loop to test if the pins are still working on the Pi. Any way to test if the pins on the module are fried? Commented Oct 19, 2016 at 13:05
  • Oh, so you tried RS232 pins first? Sorry to say this, but there are high chances your pins are already dead. Definitely test them before you proceed. Commented Oct 19, 2016 at 13:20
  • No I tried the U_RXD and U_TXD pins first, I only tried the RS232 pins after I did not have success with the U_* pins. Can I test if the pins work with a voltmeter or something? Commented Oct 19, 2016 at 13:49
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    You can test the pins using a simple loopback -- attach the Pi's tx to it's own rx and open minicom or screen (or any serial terminal app). You should get what you are typing back echoed (just make sure the echo is actually set on the app so you can see it in the first place, because you want to make sure when you type x you get xx). Commented Oct 19, 2016 at 17:40