Error occurred. Improv Wi-Fi serial not detected

[a.waelshebl (Ahmed Wael)]

Hey all,
i wanted to do an ESP32-S3 voice assistant using INMP441 as a microphone and Max98357a as speaker
The issue is the ESP32 just gives the below error if i use it for the first time or if i try to connect to wifi on esphome web interface

and also not showing when i try adding it in home assistant because it is not connected to internet so i don’t know it’s ip to add it

i am following this guide : Voice Assistant Timers With On-Device Wake Word Detection On ESP32 S3 | Smart Home Circle

searched everywhere here and on reddit along with github with no luck in any of the solutions provided, all i need is just copy the code from the guide, paste it and check it on home assistant if it is working, noting that the code is validated when i check it on esphome but it seems it is not connected to wifi or smth
please help

[neel-m (Neel Malik)]

this might help:

New device: An error occurred. Improv Wi-Fi Serial not detected

I am in the same situtation but on a step further. I was able to connect over com1 port (USB) and install basic firmware using “install for first use”. However, after the installation it tries to configure the wifi and that returns the above error. Any ideas?

It is not clear exactly how you are using esphome and connecting to the esp. There are a couple of ways you could be doing that and some are more picky about the exact method.