ESP8266 Community Forum

- Fri Dec 05, 2014 4:06 pm #4079

i think you should...

Maybe thats a good place to gather information about all connections outside the chip.

1. How to proper connect CH_PD pin
2. RESET pin (floating?)
3. GPIO0, GPIO2

- Fri Dec 05, 2014 9:29 pm #4096

Setting high level on pin configured sa output means high level and can drive LED.

setting outpin to low can also driver led.

On the boot GPIO's are configured as inputs.
To drive LED's GPIO's are configured as outputs.

you drive led after boot.

So, if You prepare schematic straight for drive LED's You can have problems to proper reboot chip.

i dont know about that.

If You play with GPIO good option with capacitors is to set GPIO2 as input an pullup before (expecting) reset chip

because you configured your output as source driver. try making it sink driver.

- Fri Dec 05, 2014 10:26 pm #4099

try making it sink driver

I was changing as You describe - to dive LEDs in low level.
No capacitors, no problem with boot.

led2.jpg

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- Wed Feb 04, 2015 5:04 pm #8987 I have a question. How to read GPIO0, GPIO2 state when they are pulled-up to VCC?
when I use
int state = GPIO_INPUT_GET(4);
I'm always getting 1 as a result