Failed to connect to ESP32: No serial data received

Projects General Guidance
1

Hi, I started with buying a esp32 from AZDelivery, as well as a USB to TTL Converter, I have connected them via GND, 3V, RX to TX and TX to RX. When I open Putty and connect to it, on COM5 with a Baud Rate of 115200 and it works. It normally boots up and everything is fine. I have then made a new Project via the ESP-IDF Extension in VSCode, selected the Port, Build the Project and tried to flash it, but got the following error:
esptool.py v4.7.0
Serial port COM5
Connecting......................................

A fatal error occurred: Failed to connect to ESP32: No serial data received.
For troubleshooting steps visit: Troubleshooting - ESP32 - — esptool.py latest documentation

2

Please provide a direct link for both items you have bought (the ESP32 and the Converter, I know AZDelivery so I suppose it's Amazon...), and possibly also a graphic diagram of the connections (to make things simpler and clearer for us). Thanks.

3

Hi, thanks for the answer and yeah, both are from Amazon.

Converter -
https://www.amazon.de/dp/B089QJZ51Z?ref=ppx_pop_mob_ap_share

ESP -
https://www.amazon.de/dp/B071P98VTG?ref=ppx_pop_mob_ap_share

GND - GND
3V3 - 3V3
TXD - RXD
RXD - TXD

image
image3024×4032 3.56 MB

4

You have this 38-pin ESP32 Dev Board which yo can program using the Arduino IDE and borad's built-in USB/TTL Converter. Why do you want to program it using a seperate USB/TTL Converter -- is it an experiment?

5

I don't know why, but knowing AZDelivery I imagined it... Why have you bought that TTL converter?
Do you know what this thing is there for?
image

PS: AZDelivery items are sold together with a "quick start" e-book manual, have a look at it!

6

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