how to monitor UART bus from ESPHome

[admin]

uart:
  baud_rate: 9600
  debug:
    direction: BOTH
    dummy_receiver: true
    after:
      timeout: 10ms
  tx_pin: 9
  rx_pin: 8
switch:
  - platform: uart
    name: "UART Button"
    data: [0xDE, 0xAD, 0xBE, 0xEF]