ESP8266 Community Forum

- Fri Mar 25, 2016 2:09 pm #44027 just connect gpio02 to 3.3v directly.
Had the same thing the sketch was acting strange. The setup() run but loop() was not running as long as gpio02 was not connected to 3.3v

- Sat Mar 26, 2016 1:03 am #44046

just connect gpio02 to 3.3v directly.
Had the same thing the sketch was acting strange. The setup() run but loop() was not running as long as gpio02 was not connected to 3.3v

Thank you but reflashing the firmware solved the pb

- Sun Apr 02, 2017 9:13 am #64513 Hello,Recently I connected my esp8266-01 with my arduino and started communicating with it.During that time I changed baud rate from 110000 to 9600.After that also esp was responding but after sometime I remove power supply and shutdown my work.After that while I connect back blue led on esp was constantly on and also stopped to responding AT commands..Can anyone suggest me what should I do to get rid out from it?

- Tue Jan 22, 2019 8:26 am #80208

Hello,

I posted comments on the live chat but no one there.
Hence, I post the description of my pblem here.

Thank you in advance for helping me.

Here it is :

I'm trying to command a servo using the esp12-e. For this I use a level converter 3,3V <=> 5V to command the servo from the pin 5 of the ESP8266.
I use also the pin 14 to light a led after the servo has finished rotating.

The sketch uploaded from the arduino IDE worked perfectly until I brought the mechanism to my door downstairs and arriving there, the blud led on the chip is ALWAYS on.

I did nothing except the led dropped down along the way.

So when I reseted the mechanism using RST ==> GND, the blue led went ON until now. I tried to reset again but as soon as the reset is done, here we go, the blue led goes ON !

I tried the many boot mode (CH_PD and GPIO02 down whereas GPIO15 up) but nothing !!!
The blue led goes ON ON and ON

Can you help me please ? I get foolish.

Thank you.

Ando

For me, I noticed this strange behaviour and realized this happens if I use D4 as a GPIO.
I had simply added a line of code-->
pinMode(D4,OUTPUT)
And it always caused the led to be on.