ESP32 - CAM

splus996
Posts: 1
Joined: Mon Feb 23, 2026 4:08 pm

ESP32 - CAM

Postby splus996 » Mon Feb 23, 2026 4:25 pm

Hello Everyone,

New here, and with ESP in general.

i got an ESP32 CAM (HW-297 ESP32-CAM - from the PDF manual) and a TTL Programmer (FT232RL) from TEMU few months ago, and finally decided to try and do something with it.

wired like this:

ESP GND - GND TTL
ESP UOT - TX TTL
ESP UOR - RX TTL
ESP 100 - ESP GND
ESP 3v3 - VCC TTL

Jumper on TTL set to 3v3

COM3 port is the one that shows up when plugged in and TTL device works on that port.

when i try to push the code to EPS i get the following error message:
esptool v5.1.0
Serial port COM3:
Connecting......................................

A fatal error occurred: Failed to connect to ESP32: No serial data received.
For troubleshooting steps visit: https://docs.espressif.com/projects/esp ... oting.html

Failed uploading: uploading error: exit status 2
i got no messages in serial monitor when pressing reset button on ESP, and no LED's light up at any point.

what i tried so far:

swapping tx and rx wires
changing to vcc - 5v
reconnecting the vcc wire to see if it reboots
holding down reset button for 1-3 sec during "connecting" message from IDE

i also measured the voltage on ESP32 as follows;

when connected to 5v , gnd and 5v show 4.9v and 3v3 shows 3.8 (Gemini said this means board is dead)
when connected to 3v, 3v3 and gnd show 3.3v

I need someone to help me confirm if this board is dead or should i keep trying to make it work.

thank you in advance!

nopnop2002
Posts: 347
Joined: Thu Oct 03, 2019 10:52 pm
Contact:

Re: ESP32 - CAM

Postby nopnop2002 » Wed Feb 25, 2026 7:13 pm

The ESP32's UART TX/RX and the TTL device's TX/RX must be crossed.

ESP32 RX---TTL TX
ESP32 TX---TTL RX

lichurbagan
Posts: 59
Joined: Thu Nov 13, 2025 3:20 pm

Re: ESP32 - CAM

Postby lichurbagan » Tue Mar 03, 2026 2:15 am

Most likely its not a dead board .... power or boot issue

ESP32-CAM should be powered from 5V pin ... FT232 adapters often cant supply enough current ... resulting in “no serial data” error

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