Perform a clean flash with esptool

[espruino-discuss]

Posted at 2015-12-31 by Arman

I used one of the GPIO pins and made an LED blink. The code was running well, so I added save() to the end of my code to make it permanent, but the LED only remained on and none of the pins worked anymore. So I a few things for cleaning the save data, like reset() or as documentation has suggested, pressing the two physical buttons at the same time. When none of these worked, I assumed flashing the device will turn it back to its original condition but now I get this:

>{ll��|�dà|��Ädìb<���ì{ÛcÄ#�óog�lgo�ãìc�pì�${$sdpònà����d����c�oã|�läl��c�û'oîd��$`��'Ç�l��orÇ��'�ld`�8ûgà���r��Üãà�c'ã|�ä���cÄò'oï��d`��ng���$��'{���g���l �xóoà��{���ãàä�c�gã|�l���c�ûgnç��l`��'�l`���o;Ç��'�{�d`��{��o�r�$`�sd�Äg��óog���ã�s'o��l�cÇb8�dc�$ä�lì�������l$l~;l�ìddlg�â����$�$l�$ä�l��oà��gä�'����dlàÀc����ßc�Û��c{c����cb�dl��n���g�Ûãol�|��d��l �{$rl§Loading -491521 bytes from flash...
 ets Jan  8 2013,rst cause:4, boot mode:(3,7)
wdt reset
load 0x40100000, len 1396, room 16
tail 4
chksum 0x89
load 0x3ffe8000, len 776, room 4
tail 4
chksum 0xe8
load 0x3ffe8308, len 540, room 4
tail 8
chksum 0xc0
csum 0xc0
2nd boot version : 1.4(b1)
  SPI Speed      : 40MHz
  SPI Mode       : QIO
  SPI Flash Size & Map: 4Mbit(256KB+256KB)
jump to run user1 @ 1000
don't use rtc mem data
{$OÿLoading -491521 bytes from flash...

and then nothing.
I tried to flash it a few more times trying both sets of parameters written in tutorial page with esptool (just as I did in the first place and worked well) but it seems something wrong has remained on the board

[espruino-discuss]

Posted at 2015-12-31 by Ollie

I'm assuming ESP8266 and you've added the reset buttons?
There's an erase_flash command you can use that will clear everything. See esptool -h for more info. Then reflash with your espruino binaries and hopefully all good.

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Posted at 2015-12-31 by Arman

Thank you! yes! that did the trick.

The board I have is a Nodemcu V3, so the physical buttons I was mentioning were the RST and FLASH.