supply voltage from rs232

[pan-sef]

Does any try to supply voltage from rs232 to esp32 with a dc-dc converter ? like wifi plug works ?
https://www.aliexpress.com/i/4001246910924.html

[syssi]

Feel free to power the ESP using pin 4 or pin 7 (depending on your model) and use a cheap DC-DC converter to bring the 12V down to 5V.