ESP32 Forum

Hi Team,

I am facing the issue in ESP32 WROOM 32 module like uploading code done but it's not working any GPIOs.

For Example uploading Simple Blink LED its successfully uploaded but LED is not turn on and i am not getting voltage across this.

Kindly give us solution for this.

I am sharing the Schematic please help me out

What does your UART output say?

Even UART also empty nothing is coming

What does your UART say when you momentarily short the EN pin to ground?

Hi Team,

After Short the EN and Ground pin, I am getting some garbage value. Please refer the attached image.

Hi Team,

For every time uploading the program need to EN pin Active LOW, Can you please tell me reason why it happed.

Thanks

Because you don't have an auto-reset circuit. The ESP32 will only go into download mode when you press and hold SW1 and then reset the ESP32.

(As a sidenote: looking at your schematic, C20 is too small. The datasheet advises an 1uF there. In general: we strongly suggest to read and follow the datasheet of your module and also see what the hardware design guidelines document says that applies to your setup.)

Hi Team,

Yes sir, we do agree what your said. Even after change the C20 capacitor value 0.1uF to 1uF. Nothing is changed same result we are getting.

Thanks

Hi team,

The above schematics work with other circuits can you please explain.

Hi Team,

Once done the uploading the code. We made EN pin active low and its working ESP32 module side but Other part like ZigBee is not working what may be the issue. Can you please help me out.