th_in_gs

@th_in_gs@lemmy.sdf.org

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th_in_gs,

What temperature are you using?

th_in_gs,

4

th_in_gs,

I think it might be a controversial topic, but I’m fond of tip tinner - something like this:

www.amazon.com/dp/B00NS4J6BY

SBC UART debug troubleshooting

Right to the point: On a BPI-R3, should connecting the UART debug pins directly to the appropriate pins on a DB9 USB serial adapter (rx->tx, tx->rx, gnd->gnd) work? Because I’m just getting a garbled mess in my serial console. I’ve tried all different baud rates. I’m using a high quality serial adapter (Keyspan Tripp...

th_in_gs,

I suspect your serial converter is expecting a ‘real’ RS232 signal, with its old-school now-weird voltage levels.

Your USB serial adapter is probably using 5V or 3V so-called ‘TTL’ signaling (which in the real world is mostly cross-compatible between 5V and 3V)

Good explanation here: https://www.sparkfun.com/tutorials/215

th_in_gs,

I suspect your serial converter is expecting a ‘real’ RS232 signal, with its old-school now-weird voltage levels.

Your USB serial adapter is probably using 5V or 3V so-called ‘TTL’ signaling (which in the real world is mostly cross-compatible between 5V and 3V)

Good explanation here: https://www.sparkfun.com/tutorials/215

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