ESP8266 Community Forum

- Sat Jun 20, 2015 10:19 am #21025

- Edit esptool.py so that:
ESP_RAM_BLOCK = 0x180
ESP_FLASH_BLOCK = 0x40

This worked for me on my Mac, thanks very much.

- Sat Jun 20, 2015 11:59 pm #21079 Man that system sounds complicated . Move to Arduino IDE its just so much simpler!

- Thu Jul 09, 2015 6:06 am #22828 I have been banging my head against this issue for nearly a week and there is so much information and speculation on this "Invalid head of packet" issue.
I was thinking it was the FTDI USB-RS232 module I was using. I had marginally more success with one module that another one but they were both very intermittent.
This modification to the esptool.py script worked instantly! 100% written.
Now comes the hard part, do something with the ESP.

- Mon Aug 17, 2015 12:29 pm #26280

This is what I did to flash my ESP8266 - 01 from my windows pc
- Edit esptool.py so that:
ESP_RAM_BLOCK = 0x180
ESP_FLASH_BLOCK = 0x40
esptool.py -p COM7 write_flash 0x000000 nodemcu_latest.bin

+1

I didn't have to change ESP_FLASH_BLOCK. Changing ESP_RAM_BLOCK fixed issue.
Any reasonable explanation why changing ESP_RAM_BLOCK works ?

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