ESP8266 Community Forum

- Sat Apr 08, 2017 11:17 am #64744 Hello All,

I would like to ask about my problem.
I have used the GPIO12 as output and driving a mosfet using the pin.
The problem is GPIO12 is logic high for 500 ms on boot. It creates a pulse on boot every time.

I have tried to add code on Setup() section to set it to low on boot but it still behaves the same.

Code: Select allpinMode(12, OUTPUT);
digitalWrite(12, 0);

I think the problem is in SDK level, so it takes about 500 ms to reach in Setup() in Arduino sketch.

What can I do to figure it out?

My config:
QIO, 40Mhz, 160Mhz, 1MB Flash

Thanks in advance.

- Sat Apr 08, 2017 12:57 pm #64747

Hello All,

I would like to ask about my problem.
I have used the GPIO12 as output and driving a mosfet using the pin.
The problem is GPIO12 is logic high for 500 ms on boot. It creates a pulse on boot every time.

I have tried to add code on Setup() section to set it to low on boot but it still behaves the same.

Code: Select allpinMode(12, OUTPUT);
digitalWrite(12, 0);

I think the problem is in SDK level, so it takes about 500 ms to reach in Setup() in Arduino sketch.

What can I do to figure it out?

My config:
QIO, 40Mhz, 160Mhz, 1MB Flash

Thanks in advance.

Thread about this here: viewtopic.php?f=13&t=951

esp8266 otb-iot software - https://github.com/piersfinlayson/otb-iot
esp8266 otb-iot documentation - https://otb-iot.readthedocs.io/
esp8266 related blog - http://www.packom.net/

- Sat Apr 08, 2017 1:06 pm #64749 Thank you, thus there is no chance to disable it programmatically. So bad because I cannot change the PCB already manufactured.