MicroPython Forum (Archive)

gregsvo wrote:I've been struggling to get 1.8.6 installed onto my nodemcu board.

I downloaded 1.8.6, and ran this command:

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esptool.py --port /dev/tty.SLAB_USBtoUART --baud 460800 write_flash --flash_size=8m 0 esp8266-20161110-v1.8.6.bin

It seems to flash the board correctly, but when I disconnect the board/reconnect (ie: reboot) the blue led flashes rapidly, and the board/repl is inaccessible. When I run

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 screen /dev/tty.SLAB_USBtoUART 115200

all I see is a whole bunch of this:

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�bl ��p�no�$$l�pdN|���{$d����rrn#���$�2c�l#䌜����B�#$`���p�oN�$2d$l�pdn|���{$$ܾ���rso#���$�2c�lB����"�#$`���p�on�l$ld�b��� {ll��|�l�|�l�c|����r�#�b��no�loN���bplclrdp�o��lBo�|���p��oo�l��l �Nn$`n{���o{�rdp�n�r�����"o�|ll�b��no�$`�oo�{$or���Nr�� p�N�r�ܜ����cn�|�B�|�n��l �2no�s$or���N��{lr��o2��s$$ܞ���r{oB���l�B��b�ܜ���c�bl ���p�oN�$$l�p$n|��`s$lܟ|�$�|�l�"|���2�s�b�p��oN�lNn���cpl#ls$p�o��lBo�|���b��no�l��l`�Nn$`n{���o{�lp�n�r�ܜ��cn�|l$�p�|

Any help you can give is greatly appreciated!

shaoziyang wrote: You must erase flash before download.
esptool.py --port /dev/tty.SLAB_USBtoUART erase_flash

gregsvo wrote:

shaoziyang wrote: You must erase flash before download.
esptool.py --port /dev/tty.SLAB_USBtoUART erase_flash

I'm sorry I didn't include that as part of the description - but yes, I'm erasing the flash before hand. Is there a possibility it's not erasing completely?

shaoziyang wrote:
Yes, if erase too fast (less than 1 sec), it maybe not erase completely. It will take 2-3 sec normal, you may run erase command again.

gregsvo wrote:

shaoziyang wrote:
Yes, if erase too fast (less than 1 sec), it maybe not erase completely. It will take 2-3 sec normal, you may run erase command again.

Any recommendations on how to slow down the erasing process, to avoid errors?

gregsvo wrote:I've been struggling to get 1.8.6 installed onto my nodemcu board.

I downloaded 1.8.6, and ran this command:

Code: Select all

esptool.py --port /dev/tty.SLAB_USBtoUART --baud 460800 write_flash --flash_size=8m 0 esp8266-20161110-v1.8.6.bin

It seems to flash the board correctly, but when I disconnect the board/reconnect (ie: reboot) the blue led flashes rapidly, and the board/repl is inaccessible. When I run

Code: Select all

 screen /dev/tty.SLAB_USBtoUART 115200

all I see is a whole bunch of this:

Code: Select all

�bl ��p�no�$$l�pdN|���{$d����rrn#���$�2c�l#䌜����B�#$`���p�oN�$2d$l�pdn|���{$$ܾ���rso#���$�2c�lB����"�#$`���p�on�l$ld�b��� {ll��|�l�|�l�c|����r�#�b��no�loN���bplclrdp�o��lBo�|���p��oo�l��l �Nn$`n{���o{�rdp�n�r�����"o�|ll�b��no�$`�oo�{$or���Nr�� p�N�r�ܜ����cn�|�B�|�n��l �2no�s$or���N��{lr��o2��s$$ܞ���r{oB���l�B��b�ܜ���c�bl ���p�oN�$$l�p$n|��`s$lܟ|�$�|�l�"|���2�s�b�p��oN�lNn���cpl#ls$p�o��lBo�|���b��no�l��l`�Nn$`n{���o{�lp�n�r�ܜ��cn�|l$�p�|

Any help you can give is greatly appreciated!

cristiand391 wrote:To avoid this issue, you just need to set the correct flash size of your module when you flash the firmware. V1.8.6 is based on SDK 2.0.0 and flash size auto detection has been moved to esptool.

Try this, before erase flash!

esptool.py --port /dev/tty.SLAB_USBtoUART --baud 460800 write_flash --flash_size=detect -fm dio 0 esp8266-20161110-v1.8.6.bin

Sorry for my bad english

esptool.py --port /dev/tty.SLAB_USBtoUART --baud 74880 write_flash --flash_size=detect -fm dio 0 esp8266-20161110-v1.8.6.bin

gregsvo wrote:

cristiand391 wrote:To avoid this issue, you just need to set the correct flash size of your module when you flash the firmware. V1.8.6 is based on SDK 2.0.0 and flash size auto detection has been moved to esptool.

Try this, before erase flash!

esptool.py --port /dev/tty.SLAB_USBtoUART --baud 460800 write_flash --flash_size=detect -fm dio 0 esp8266-20161110-v1.8.6.bin

Sorry for my bad english

THANK YOU! Your answer took me most of the way there. I used the same command, but slowed down the baud rate- and it worked great. Here's the command I used:

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esptool.py --port /dev/tty.SLAB_USBtoUART --baud 74880 write_flash --flash_size=detect -fm dio 0 esp8266-20161110-v1.8.6.bin