ESP8266 Community Forum

- Wed Jul 22, 2015 6:18 pm #23969

If I recall correctly, I used 3V and 220 Ohm resistor and it was working fine.
Anyway, I have given up on the esp8266 as I am more interested in the esp12 with more GPIOs.
I no longer have this issue with esp12 since I am no longer using GPIO2.

So am i right saying that a different board type fix the problem?

- Wed Jul 22, 2015 6:29 pm #23970 Yes

- Wed Jul 22, 2015 7:08 pm #23971

Yes

Which one apart from the esp-12?

sorry for the silly question.

- Wed Jul 22, 2015 8:03 pm #23972 I think the discussion here is that on ESP12, you don't have to rely on on GPIO0/GPIO2 as normal GPIOs, since there is plenty(?) of other GPIOs.
The SINK hack on GPIO2 is simply a workaround about Boot EXEC mode for ESP01 since there only GPIO0/GPIO2 available on header.
But, just as a reminder, it is so easy to hook up an MCP23017 on ESP01 GPIO0/GPIO2 and since I2C bus require pullups anyway, it is a perfect fit to have 16 more GPIOs !