ESP8266 Community Forum

Running 1.8.5 NB on a RasPi3
ssh -X me@raspi

So the Serial Monitor wasn't a problem until the last couple of days ago

I plug in my proto board with a 8266
From the command line I run "arduino"
up comes the last sketch(or2)
> ls /dev/ttyUSB*
I get ttyUSB0
Tools->Port sel usb0
click on mag-glass and up pops the Serial Monitor
Double check Tools and "Port" is blank
> ls /dev/tty...
USB1 ah...
Tools->Port usb1
Sketch->Serial Monitor
error: ttyUSB1 is not avail
and Port is empty - again
insanity is doing the same...........

Yes - Serial.begin (9600);
Yes - I am a member of dialout

I'm in twisty little passages all alike....

Your USB to serial chip is probably resetting (check the output of "dmesg" to confirm).

Most likely causes for such an issue are faulty USB cables or you are drawing too much power from the USB bus, causing the chip to brown out.

OK, ... Tools->Port ttyUSB0
Tools (popup) and yup, USB0
Click on SerMon icon and dmesg gives this
Tools (popup) and Port is blank
Line 168032 "usb discon..." dev# increments every time I do the above.
It's as if the
void Bring_Up_Ser_Mon()
{
discon_current_port ();
.....
}

PS I seem to remember something about a file in /etc/udev ...????

More parts of the puzzle. I switched over to a NodeMCU 1.0 and I have Serial Monitor.
I was using a FTD1232 with a Generic 8266-01 and the problem I'm having.
Driver??? But it was working. I did do an apt-get update.
<sigh>