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Old 20 April 2014, 23:45   #325
Registered User
Join Date: Oct 2009
Location: Salem, OR
Posts: 1,128
That's the same error i was getting.
Double check your cables, and if you are using plugs on headers, back them out a bit..

I am assuming a dmesg is showing something like this when you plug in your cable:
[13880.473791] pl2303 2-1:1.0: pl2303 converter detected
[13880.485429] usb 2-1: pl2303 converter now attached to ttyUSB0
[13880.485475] usbcore: registered new interface driver pl2303
[13880.485480] pl2303: Prolific PL2303 USB to serial adaptor driver

OK, I just tested it with minicom in Linux. If you are using a debian variant (Ubuntu, Mint, etc), just do this:
sudo apt-get install minicom
sudo -D /dev/ttyUSB0
(assuming ttyUSB0 is what you saw in your dmesg output)

Then add a jumper wire between the send/receive wires with your serial adapter. (on mine, that is white/green)
Make sure you're not doing anything with the power from the serial adapter. Just TX/RX

Whatever you type should echo back.
If you aren't sure, do a CTRL-a and E (that turns on local echo) and you should see whatever you typed twice.

That way, you know your usb/serial adapter is working. Also, with a multimeter, you probably want to double check your voltage on the power wires to make sure that is working also.

Beyond that, it's probably the connection (bad connection, bad soldering, etc).


Last edited by desiv; 21 April 2014 at 00:00.
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