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Wemos D1 Mini cannot communicate over USB

PostPosted: Thu Feb 09, 2017 5:41 pm
by Marco Lazzarotto
Hello to all,
yesterday I received my first Wemos D1 mini and today I soldered the pins on the board, not without problems though (the holes are too big and I soldered the pins not completely perpendicular and the board didn't fit in the breadboard).

The board is detected from my pc and the COMx is assigned from Windows (already updated the USB drivers), but I can't receive or send anything. When I press the reset button it blinks 1 time very fast, but other than that it does nothing.

I tried with Arduino IDE Serial Monitor to listen for something on every baud rate available and also to write the example's blink sketch.
When I upload the code the board starts blinking very fast but I get
Code: Select allwarning: espcomm_sync failed
error: espcomm_open failed
error: espcomm_upload_mem failed
error: espcomm_upload_mem faile
.
I also tried some command with esptool version 2.0 but the tool times out:
Code: Select allA fatal error occurred: Failed to connect to Espressif device: Timed out waiting for packet header
.

Since it is my first Wemos D1 mini I'd like to know if I am making something wrong or the board si "dead".

Re: Wemos D1 Mini cannot communicate over USB

PostPosted: Sat Feb 11, 2017 3:29 am
by gdsports

Re: Wemos D1 Mini cannot communicate over USB

PostPosted: Sat Feb 11, 2017 5:52 am
by Marco Lazzarotto
gdsports wrote:Possible bad cable.

viewtopic.php?f=28&t=13452&hilit=bad+cable

I tried with another cable on another computer. I think that was dead before I received it.

Re: Wemos D1 Mini cannot communicate over USB

PostPosted: Sun Feb 12, 2017 9:49 am
by yudxp
Marco Lazzarotto wrote:
gdsports wrote:Possible bad cable.

viewtopic.php?f=28&t=13452&hilit=bad+cable

I tried with another cable on another computer. I think that was dead before I received it.


have you try program it with another usb serial like FTDI?