Hoping help for esp32 communication

[JackieLs]

I write some buffer, like <Buffer c0 00 d1 08 00 00 00 00 00 00 00 19 00 00 00 18 00 c0> to the port
the port should be response.
But I got nothing.

port.write(buff)
port.drain()
port.on('data', (data) => console.log(data))

nothing printed..... T_T

https://docs.espressif.com/projects/esptool/en/latest/esp32/advanced-topics/serial-protocol.html