Hi everyone,

I'm working on a custom PCB design using the ESP32 and the CP2102N USB-to-UART bridge. This is my first time integrating both on a board, and I’d really appreciate it if anyone could take a look at my schematic and let me know if there are any issues or things I should change.

I've attached the schematic to this post (see below), and here are the datasheets I'm referencing:

ESP32 Datasheet (Wroom) https://www.snapeda.com/parts/ESP32-WROOM-32/Espressif Systems/datasheet/

CP2102N Datasheet (Silicon Labs) https://www.pololu.com/file/0J1761/cp2102n-datasheet.pdf

Some specific things I’d love feedback on:

- USB D+/D− routing and termination
- Power supply filtering and decoupling for both chips
- Reset/EN and BOOT circuitry for the ESP32
- General look-over the schematic, Anything I've done wrong?

Let me know if you spot anything questionable or if you've done a similar setup before and have tips!

Attached is a .PDF of the Schematic ive made

Thanks in advance!

 

ESD protection looks missing:
https://electronics.stackexchange.c...sb-line-for-a-esp32-s3-require-esd-protection

 

One critical mistake:

The micro's Tx pin needs to go to the converter's Rx pin and vice versa. Check this carefully. I've seen a few cases where they've tried to be "helpful" and labeled pins as what they connect to rather then what they are, but to usual case is:

Tx—> Rx

Rx —> Tx

 

Thanks For your feedback people!!

after speaking to others I have decided to move over to the ESP32 S3 variant, It has onboard usb. so that makes things much easyier. I will however be adding the esd protection to my design.