[TriEmbed] FTDI Issues

[Brian Henning]

On closer look, I think I misunderstood something.

Whatever it is that you are plugging into the USB port on the host is what is dead.  I don’t see USB pins on the ESP8266 chip’s pinout, so I’m guessing that means there’s a piece in between (“FTDI Adapter?”).

If this is your system (simplified, of course):

---+
   |               +--------------+           +---------+
PC |]=[USB cable]=[| FTDI Adapter |]=[wires]=[| ESP8266 |
   |               +--------------+           +---------+
---+                      ^                        ^
                          |                        |
                     This is the                Not this
                     broken part

Try plugging the FTDI adapter into a different host.  If that host also fails to recognize it, it’s definitely dead.  The host should recognize the FTDI device regardless of what is downstream from it.

Hope that helps.
-Brian

From: Nathan Yinger [mailto:npyinger at ncsu.edu]
Sent: Friday, May 29, 2015 4:13 PM
To: Brian Henning
Cc: triembed at triembed.org
Subject: Re: [TriEmbed] FTDI Issues

Nothing at all...does that mean the chip is dead?
Thanks,
~Nathan

On Fri, May 29, 2015 at 10:10 AM, Brian Henning via TriEmbed <triembed at triembed.org<mailto:triembed at triembed.org>> wrote:
> The ESP chip overdrew its power supply before, but the last time I used it was after that, so that can't be it.

Well, that could be it.  Just because the bridge didn’t break when the 18-wheeler drove over it, that doesn’t mean it wasn’t damaged to the point that it collapses after a few more small cars.

That said, dmesg and /var/log/messages are your friends.  With the device unplugged, sudo tail –f /var/log/messages then plug the device in.  Then you can see what the kernel does with it, if anything.

HTH,
-Brian

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