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I designed a custom ESP32 board with a CP2102N bridge (schematic attached). I'm using an ESP32-WROOM-32UE. My schematic is based on the ESP32-Devkitc-V4 board from Espressif (schematic attached). When I plug the board to my computer (with VCC connected to a 7.2V power supply), the CP2102N is correctly showing on the device manager. However, I didn't manage to upload any code to my ESP32. I tried with autostart (without pressing any button) and by using enable and boot button, but it is not working. The arduino IDE is displaying a serial data error. I heard that I should desolder the capacitor in parallel with the boot button (C6 100nF). Is this cap causing the issue or there is a schematic mistake ?

OS: Windows 10 Board: Custom (based on ESP32-Devkitc-V4 by Espressif) IDE: Arduino USB/UART Bridge: CP2102N-A02-GQFN24R

ESP32 custom board ESP32-Devkitc-V4 by Espressif

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1 Answer 1

Reset to default
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The CP2102N VIO pin is not connected, so it is missing a supply voltage for IO pins and thus can't work.

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  • \$\begingroup\$ Thank you very much, now it is working perfectly !! \$\endgroup\$
    – AyubowanPro
    Commented Jun 21, 2022 at 20:03

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