ESP8266 Community Forum

Posted: **Sat Mar 09, 2019 5:06 pm**

Ok, i am at my wits end. I have tried everything i can think of.

When i try uploading the sketch to my d1 mini lite i get the following error
warning: espcomm_sync failed
error: espcomm_open failed
error: espcomm_upload_mem failed
error: espcomm_upload_mem failed

I am using COM6
Upload speed 115200 (same as in device manager)
size 1M (512k SPIFFS)
CPU 80

I have followed a few different examples like this
https://wiki.wemos.cc/tutorials:get_sta ... in_arduino

though I cannot login and download the boards.txt file.

Somewhere i found this and added it to my boards.txt so it showed up.

Code: Select all

d1_mini_lite.name=WEMOS D1 mini Lite

d1_mini_lite.upload.tool=esptool
d1_mini_lite.upload.speed=921600
d1_mini_lite.upload.resetmethod=nodemcu
d1_mini_lite.upload.maximum_size=434160
d1_mini_lite.upload.maximum_data_size=81920
d1_mini_lite.upload.wait_for_upload_port=true
d1_mini_lite.serial.disableDTR=true
d1_mini_lite.serial.disableRTS=true

d1_mini_lite.build.mcu=esp8266
d1_mini_lite.build.f_cpu=80000000L
d1_mini_lite.build.board=ESP8266_WEMOS_D1MINI
d1_mini_lite.build.core=esp8266
d1_mini_lite.build.variant=d1_mini
d1_mini_lite.build.flash_mode=dout
d1_mini_lite.build.flash_freq=40
d1_mini_lite.build.spiffs_pagesize=256
d1_mini_lite.build.debug_port=
d1_mini_lite.build.debug_level=

d1_mini_lite.menu.CpuFrequency.80=80 MHz
d1_mini_lite.menu.CpuFrequency.80.build.f_cpu=80000000L
d1_mini_lite.menu.CpuFrequency.160=160 MHz
d1_mini_lite.menu.CpuFrequency.160.build.f_cpu=160000000L

d1_mini_lite.menu.UploadSpeed.921600=921600
d1_mini_lite.menu.UploadSpeed.921600.upload.speed=921600
d1_mini_lite.menu.UploadSpeed.115200=115200
d1_mini_lite.menu.UploadSpeed.115200.upload.speed=115200
d1_mini_lite.menu.UploadSpeed.9600=9600
d1_mini_lite.menu.UploadSpeed.9600.upload.speed=9600
d1_mini_lite.menu.UploadSpeed.57600=57600
d1_mini_lite.menu.UploadSpeed.57600.upload.speed=57600
d1_mini_lite.menu.UploadSpeed.256000.windows=256000
d1_mini_lite.menu.UploadSpeed.256000.upload.speed=256000
d1_mini_lite.menu.UploadSpeed.230400.linux=230400
d1_mini_lite.menu.UploadSpeed.230400.macosx=230400
d1_mini_lite.menu.UploadSpeed.230400.upload.speed=230400
d1_mini_lite.menu.UploadSpeed.460800.linux=460800
d1_mini_lite.menu.UploadSpeed.460800.macosx=460800
d1_mini_lite.menu.UploadSpeed.460800.upload.speed=460800
d1_mini_lite.menu.UploadSpeed.512000.windows=512000
d1_mini_lite.menu.UploadSpeed.512000.upload.speed=512000

d1_mini_lite.menu.FlashSize.1M512=1M (512K SPIFFS)
d1_mini_lite.menu.FlashSize.1M512.build.flash_size=1M
d1_mini_lite.menu.FlashSize.1M512.build.flash_ld=eagle.flash.1m512.ld
d1_mini_lite.menu.FlashSize.1M512.build.spiffs_start=0x7B000
d1_mini_lite.menu.FlashSize.1M512.build.spiffs_end=0xFB000
d1_mini_lite.menu.FlashSize.1M512.build.spiffs_blocksize=8192
d1_mini_lite.menu.FlashSize.1M512.upload.maximum_size=499696

d1_mini_lite.menu.FlashSize.1M256=1M (256K SPIFFS)
d1_mini_lite.menu.FlashSize.1M256.build.flash_size=1M
d1_mini_lite.menu.FlashSize.1M256.build.flash_ld=eagle.flash.1m256.ld
d1_mini_lite.menu.FlashSize.1M256.build.spiffs_start=0xBB000
d1_mini_lite.menu.FlashSize.1M256.build.spiffs_end=0xFB000
d1_mini_lite.menu.FlashSize.1M256.build.spiffs_blocksize=4096
d1_mini_lite.menu.FlashSize.1M256.upload.maximum_size=761840

d1_mini_lite.menu.FlashSize.1M192=1M (192K SPIFFS)
d1_mini_lite.menu.FlashSize.1M192.build.flash_size=1M
d1_mini_lite.menu.FlashSize.1M192.build.flash_ld=eagle.flash.1m192.ld
d1_mini_lite.menu.FlashSize.1M192.build.spiffs_start=0xCB000
d1_mini_lite.menu.FlashSize.1M192.build.spiffs_end=0xFB000
d1_mini_lite.menu.FlashSize.1M192.build.spiffs_blocksize=4096
d1_mini_lite.menu.FlashSize.1M192.upload.maximum_size=827376

d1_mini_lite.menu.FlashSize.1M160=1M (160K SPIFFS)
d1_mini_lite.menu.FlashSize.1M160.build.flash_size=1M
d1_mini_lite.menu.FlashSize.1M160.build.flash_ld=eagle.flash.1m160.ld
d1_mini_lite.menu.FlashSize.1M160.build.spiffs_start=0xD3000
d1_mini_lite.menu.FlashSize.1M160.build.spiffs_end=0xFB000
d1_mini_lite.menu.FlashSize.1M160.build.spiffs_blocksize=4096
d1_mini_lite.menu.FlashSize.1M160.upload.maximum_size=860144

d1_mini_lite.menu.FlashSize.1M144=1M (144K SPIFFS)
d1_mini_lite.menu.FlashSize.1M144.build.flash_size=1M
d1_mini_lite.menu.FlashSize.1M144.build.flash_ld=eagle.flash.1m144.ld
d1_mini_lite.menu.FlashSize.1M144.build.spiffs_start=0xD7000
d1_mini_lite.menu.FlashSize.1M144.build.spiffs_end=0xFB000
d1_mini_lite.menu.FlashSize.1M144.build.spiffs_blocksize=4096
d1_mini_lite.menu.FlashSize.1M144.upload.maximum_size=876528

d1_mini_lite.menu.FlashSize.1M128=1M (128K SPIFFS)
d1_mini_lite.menu.FlashSize.1M128.build.flash_size=1M
d1_mini_lite.menu.FlashSize.1M128.build.flash_ld=eagle.flash.1m128.ld
d1_mini_lite.menu.FlashSize.1M128.build.spiffs_start=0xDB000
d1_mini_lite.menu.FlashSize.1M128.build.spiffs_end=0xFB000
d1_mini_lite.menu.FlashSize.1M128.build.spiffs_blocksize=4096
d1_mini_lite.menu.FlashSize.1M128.upload.maximum_size=892912

d1_mini_lite.menu.FlashSize.1M64=1M (64K SPIFFS)
d1_mini_lite.menu.FlashSize.1M64.build.flash_size=1M
d1_mini_lite.menu.FlashSize.1M64.build.flash_ld=eagle.flash.1m64.ld
d1_mini_lite.menu.FlashSize.1M64.build.spiffs_start=0xEB000
d1_mini_lite.menu.FlashSize.1M64.build.spiffs_end=0xFB000
d1_mini_lite.menu.FlashSize.1M64.build.spiffs_blocksize=4096
d1_mini_lite.menu.FlashSize.1M64.upload.maximum_size=958448

I have tried the latest package and a few others from github.

I am not sure what else I can do. I hope somebody can point me in the right direction.

Posted: **Sat Mar 09, 2019 8:43 pm**

Close the IDE, disconnect the USB cable. Connect the cable to the Wemos. Connect the cable to the computer. Start the IDE. Select the COM port at 115200 and open the terminal window.

Press the reset button on the Wemos. What do you see in the Com window? It should be a line of medium length with various characters.

Change the baud rate at the bottom of the serial terminal to 74880. Now pres the reset button again. What dis it say?

If it didn't show anything then you probably don't have the right port or the port does not have a required driver.

Have you got the serial port to work with any other board or setup? Is this the first time you have worked with a board like this?

ESP8266 Community Forum

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Wemos D1 Mini LIte - Cannot Flash

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