I've had this on occasion. At least one time it was the result of a flaky USB cable. I'm pretty sure you aren't using the same USB cable for the UNO as you are for the ESP, I'd try a different cable.
Jim.
I've had this on occasion. At least one time it was the result of a flaky USB cable. I'm pretty sure you aren't using the same USB cable for the UNO as you are for the ESP, I'd try a different cable.
Jim.