Hardware not found!


Senior Member
I'm not using a USB to DB9 converter. My computer has a DB9 port that I use. I just took apart a Serial cable and found the lines that hooked to pins 2, 3, and 5 of the computer. This worked for a while, and then pin 2, 3, and 5 on the computer changed to pins 1, 3, and 4.

The serin line was always connected to the picaxe, and so I was able to see the waveform. But the computer didn't see it because the ground line or serout line weren't connected.

The computers DB9 connector is female.
Sorry, I thought you were using a USB-to-DE9 cable. However, you have confirmed what I was saying: using a female DE9 connector coming from the DTE (computer) breaks the normal situation and is prone to having the pinout reversed. In situations like this, you can't believe the number imprinted in the connector's plastic.

This is an earlier post from a previous discussion on the impact of reversing the DE9 connector's gender.