Board design flaw with ESP32-S3-WROOM-1?

[avnergid]

This is my first board design with the S3. Previous boards with ESP32 worked fine.
Tried to do the same, but I probably missed something:

So I connected 3V3, GND and pulled up EN and IO0.. Connected pads 13 and 14 to Tx and Tr, and some other pins to some other devices.
Someone suggested that I pulled all other pins not in sure down to GND which I did.

Getting no signal from the board altoguth it draws current.

What am I missing?

Thanks in advance.

Screenshot 2024-03-04 at 18.35.49.png (165.97 KiB) Viewed 2142 times

[unlessovergeneralise]

You've connected the programming header to the USB D+ and D- pins, not UART ie serial.
The UART pins are GPIO43/44 which are probably what you're after.

The data sheet recommends capacitors on EN and BOOT, but it won't stop it being programmed / seeing some output.

I wouldn't tie unused pins to ground, it's not something espressif recommends afaik.
Connecting U0TXD to GND doesn't seem like a good thing, but it's unlikely to have done any damage to the chip.

[avnergid]

Thank you much @unlessovergeneralise.
Yep you are absolutely right.
Can I still program the ESP32-S3 via the D+/D- pins ? connecting them to the computer (while providing 3V3 to the chip and connecting both GND together) didn't reveal any device.

Thanks again.

[unlessovergeneralise]

> Can I still program the ESP32-S3 via the D+/D- pins ?
Probably - you'll need to hold BOOT/IO0 down while resetting the chip to enter download mode.