Wemos D1 Mini Upload Error - error: espcomm_open failed

Development Tools IDE 1.x
1

Hi!

I have a Wemos D1 mini board, and when trying to upload a basic blink sketch with Arduino IDE I'm facing this errors:

Sketch uses 222,189 bytes (21%) of program storage space. Maximum is 1,044,464 bytes.
Global variables use 31,508 bytes (38%) of dynamic memory, leaving 50,412 bytes for local variables. Maximum is 81,920 bytes.
/Users/lean/Library/Arduino15/packages/esp8266/tools/esptool/0.4.9/esptool -vv -cd nodemcu -cb 57600 -cp /dev/cu.wchusbserial1420 -ca 0x00000 -cf /var/folders/yj/d596pq611j3g1xtsr0lxy0480000gn/T/build806b0833718d59be0092c896e1dce655.tmp/Blink.ino.bin 
esptool v0.4.9 - (c) 2014 Ch. Klippel <ck@atelier-klippel.de>
	setting board to nodemcu
	setting baudrate from 115200 to 57600
	setting port from /dev/tty.usbserial to /dev/cu.wchusbserial1420
	setting address from 0x00000000 to 0x00000000
	espcomm_upload_file
	espcomm_upload_mem
opening port /dev/cu.wchusbserial1420 at 57600
	tcgetattr
	tcsetattr
	serial open
opening bootloader
resetting board
trying to connect
	espcomm_send_command: sending command header
	espcomm_send_command: sending command payload
trying to connect
	espcomm_send_command: sending command header
	espcomm_send_command: sending command payload
trying to connect
	espcomm_send_command: sending command header
	espcomm_send_command: sending command payload
resetting board
trying to connect
	espcomm_send_command: sending command header
	espcomm_send_command: sending command payload
trying to connect
	espcomm_send_command: sending command header
	espcomm_send_command: sending command payload
trying to connect
	espcomm_send_command: sending command header
	espcomm_send_command: sending command payload
resetting board
trying to connect
	espcomm_send_command: sending command header
	espcomm_send_command: sending command payload
trying to connect
	espcomm_send_command: sending command header
	espcomm_send_command: sending command payload
trying to connect
	espcomm_send_command: sending command header
	espcomm_send_command: sending command payload
warning: espcomm_sync failed
error: espcomm_open failed
error: espcomm_upload_mem failed

Some info:

  • I have no other connection more than the USB cable.

  • When I click "Upload" I actually see the serial led blinking, so it seems that there is some activity happening, but then the errors appear.

  • I've tried with 2 different d1 mini boards and several USB cables with same results.

  • I'm running OS X El Capitan 10.11.6 and Arduino 1.6.8.

  • I've installed CH341 drivers.

  • This is how my tools menu looks like:

I'm I doing something wrong?

Thanks!

2

There were seemingly some issues with earlier DI wemos IIRC.
You might want to look that up via google.
WEMOS is not actually an ARDUINO as such.

3

Hi, i have the same issue.

Knows any what the problem is?#

I´m sry for my bad english...

4

I have no Idea, I bought a new board and it worked, so it looks like it was broken in some how.