2

I need to determine the flash size of my ESP8266 on my NodeMCU module in order to flash the AT firmware onto the board. Apparently different boards come with differently-sized flash memories. Can anyone tell me the easiest way to find the flash size?

  • By reading the manual for your NodeMCU. Which version is it? – Majenko May 27 '16 at 16:57
  • It's Version 1.0 – Sumanth May 27 '16 at 18:32
  • The version 1.0 uses the ESP-12E which has 4MB flash. – Majenko May 27 '16 at 18:36
7

Arduino's ESP8266 support includes an example sketch called CheckFlashConfig. This probes the board, and prints the flash memory size.

4

The easiest way (windows at least) is to use Espressif's flash download tool - don't select anything to flash to the device, select the appropriate com port, click start, and the details of the device will appear in the Detected Info window

-1

It is really annoying because we can't check visually the flash chip, right?

The simplest way is to use ESP8266 Flash Download Tool. I've written an easy to follow article here:

http://rosmiantoaji.com/how-to-check-flash-size-in-your-esp8266-module-simple-way/

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