ESP8266 Community Forum

Hi, sorry I wasn’t clear about the problem & fix, I had mainly posted to comment on the 4M flash size. Sorry if this is off topic.
Plugged some of these ‘new’ coluored ESP8266-01 (black board & 4M flash) into my normal flashing setup & could communicate via serial monitor but could not flash them.
Serial: Blue leds – ESP flashed twice on boot, ESP & CH340 both flashed during communication.
Flash: Blue leds – ESP flashed once on boot, CH340 flashed during Flash – ESP did not light during Flash.
Fix: my normal setup used a resistor voltage divider to reduce the 5V to 3.3V between CH340 TX & ESP URXD (from WIKI then this link).
It appears that this is not compatible with the ‘new’ coloured boards. I had to remove the divider and connect directly to the CH340 TX pin (which is 5V) this worked & I could flash the ESP. I could however replace the divider for serial communication to reduce the chance of dammage from the 5v on the unit after the flash. It looks like I need to perform this mod on my CH340.
So in summary the 1K : 2K resistor voltage divider that that worked to flash earlier boards would not work with this ‘new’ coloured board (for me anyway).

Can you provide a link to a seller who definitely sells ESP-01 with 4 MBytes flash?

I had hoped that this would happen.

I've just upgraded three of mine with these

http://www.aliexpress.com/item/10pcs-W2 ... 88878.html

had to bend the pins but it works.

Heya,

and to add even more confusion, Banggood is selling them as dark brown pcb but with only 1Mbyte chip (25Q80BSIG).

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Mozz