Configure GPIO4 as ADC Input

[kishan patel]

Hello,
I am using esp_wroom32(esp32 dev-kit).So,can i use GPIO4 as an adc input?
Thanks in advance,
Regards,
Kishan Patel.

[ESP_krzychb]

Hello kishan patel,

Yes, you can but there are some restrictions.

[kishan patel]

Okay thanks,
And can i use GPIO12 as a DTR pin?
Thanks again,
Regards,
Kishan Patel.

[ESP_krzychb]

Do you mean DTR (Data Terminal Ready) input to control serial communication?
GPIO12 or MTDI is one of Strapping Pins and should be either pulled down or pulled up on power-on reset.
External device connected to GPIO12 should not pull in opposite direction on power on reset, or ESP32 will likely fail to boot.

[kishan patel]

Okay thanks,
Yes,DTR (Data terminal Ready),i want to use it as an output.Is there any restriction to use GPIO12 as a DTR configuration?
Thanks in advance.

[ESP_krzychb]

GPIO12 is also one of dedicated JTAG pins.
If you plan to use JTAG then its operation will interfere with an application toggling DTR.
Apart from that I do not see issues with using GPIO12 as an output.