OrganicIrradiation
commented
7 years ago Fixed by putting a 10 Ohm resistor between pins D3 (DIO 0) and GND! Seems as though the reset & programming circuit's pull-down timing is off (see right side of USB to UART section of the Wemos D1 mini schematic)
$ ./esptool -vv -cp /dev/tty.wchusbserial1410 -bz 32M -cd nodemcu -cb 115200 -cf esp8266-20160823-v1.8.3-41-g253e1a6.bin
esptool v0.4.11 - (c) 2014 Ch. Klippel <ck@atelier-klippel.de>
setting port from /dev/tty.usbserial to /dev/tty.wchusbserial1410
setting flash size from 512K to 32M
setting board to nodemcu
setting baudrate from 115200 to 115200
espcomm_upload_file
espcomm_upload_mem
opening port /dev/tty.wchusbserial1410 at 115200
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
espcomm_send_command: receiving 2 bytes of data
espcomm_send_command: receiving 2 bytes of data
espcomm_send_command: receiving 2 bytes of data
espcomm_send_command: receiving 2 bytes of data
espcomm_send_command: receiving 2 bytes of data
espcomm_send_command: receiving 2 bytes of data
espcomm_send_command: receiving 2 bytes of data
espcomm_send_command: receiving 2 bytes of data
Uploading 530708 bytes from esp8266-20160823-v1.8.3-41-g253e1a6.bin to flash at 0x00000000
erasing flash
size: 081914 address: 000000
first_sector_index: 0
total_sector_count: 130
head_sector_count: 16
adjusted_sector_count: 114
erase_size: 072000
espcomm_send_command: sending command header
espcomm_send_command: sending command payload
setting timeout 15000
setting timeout 100
espcomm_send_command: receiving 2 bytes of data
writing flash
................................................................................ [ 15% ]
................................................................................ [ 30% ]
................................................................................ [ 46% ]
................................................................................ [ 61% ]
................................................................................ [ 77% ]
................................................................................ [ 92% ]
....................................... [ 100% ]
starting app without reboot
espcomm_send_command: sending command header
espcomm_send_command: sending command payload
espcomm_send_command: receiving 2 bytes of data
closing bootloader
I've been having lots of issues trying to reflash a Wemos D1 mini (ESP-12F, CH340G USB<->Serial, 4M bytes flash). I was previously able to flash it with the Arduino IDE, but after trying to reflash it with the micropython distribution, it seems as though I've soft-bricked it.
I get the following error with esptool when trying to erase the flash:
If I try to write the flash, I get the same error:
I'm able to read the chip_id and MAC with esptool.py:
If I connect with a serial terminal at 74880 baud I can see the module communicates from the bootloader when I press the restart button:
I've tried on Mac OS X 10.11.6 (with the signed driver) and on a Windows 10 machine (with automatically installed driver), both with the same results. I've also tried with virtual machines and a multitude of cables. Nothing seems to reflash it (I've tried esptool.py, esptool-ck, NodeMCU Flasher, and the espressif flash tool).
Any suggestions??