No serial data received

Hey,

I’m using an ESP32 Cam with a serial Adapter (USB to TTL). I’m trying to upload an easy sketch like blink, but i always get this error: A fatal error occurred: Failed to connect to ESP32: No serial data received.

The connection is like this:
Rx to Tx
Tx to Rx
5V to 5V
GND to GND
and IO0 with GND (ESP32 CAM)
I tried almost everything but I dont know how to fix it.

Hi @htasoji

Have you tried following our using with other esp32 guide? Espressif ESP-EYE | Documentation

Best

Eoin