The voice module updates its content through the serial port? If yes, please select the model of the module?

[spider-woman]

Whether there is a voice module that can update its internal voice content through esp8266 serial port, or whether the voice module can update the content through MCU serial port.

[johnwasser]

What do you mean by "voice module"?

What "contents" would the "voice module" have?

Do you mean something like the Elechouse Voice Recognition V3?
https://www.elechouse.com/elechouse/index.php?main_page=product_info&products_id=2254

The Elechouse module can be trained with up to 80 words, but it can only recognize seven at any one time. The library they provide only works with SoftwareSerial. I modified their library to work with any 'Stream", like Serial, Serial1, SoftwareSerial... Look for "VoiceRecognitionV4" in the forum.

[spider-woman]

Thank you. It may be a misunderstanding caused by language. I'm a person who doesn't know English very well, but I found the electronic components I need. Thank you for your help。