Debugging mode via uart_mitm does not work

[DivanX10]

Could you add the ability to work in debug mode to uart_mitm?

I use the uart_mitm component for the Philips EP 5444 Coffee machine, so that I can control the coffee machine from the control panel and at the same time download the data for decryption. There is a ready-made project ESPHome-Philips-Smart-Coffee and it is suitable for coffee machines of the 1200-2200 series, and for the 5400 series it is necessary to find bits for control.

external_components:
  - source:
      type: git
      url: https://github.com/ssieb/custom_components
    components: [ uart_mitm ]

uart_mitm:
  uart1: uart_display
  uart2: uart_mainboard

uart:
#UART connection to the control panel. We read the data from the control panel and send it to the motherboard
 - rx_pin: GPIO16 #Reading data from the control panel
   tx_pin: GPIO17 #We send the data to the control panel
   baud_rate: 115200
   id: uart_display
   stop_bits: 1
   data_bits: 8
   parity: none
   debug:
     direction: TX
     dummy_receiver: true

#UART connection to the motherboard. We read the data from the motherboard and send it to the control panel
 - rx_pin: GPIO3 #Reading data from the motherboard
   tx_pin: GPIO1 #We send data to the motherboard
   baud_rate: 115200
   id: uart_mainboard
   stop_bits: 1
   data_bits: 8
   parity: none
   debug:
     direction: TX
     dummy_receiver: true

I can only use a parallel connection for debagging, and then I don't need to use this uart_mitm component. See the diagram in the figure

If I need to embed the ESP into the wiring and for the ESP to receive and send data, then I can't do without the uart_mitm component, but it works if I don't enable debugging mode. If I turn on debugging mode, the screen goes off and the coffee machine is not controlled from the control panel

[ssieb]

dummy_receiver: true steals the bytes, so the component doesn't see them. You only need that line if there's no component listening.

[DivanX10]

dummy_receiver: true steals the bytes, so the component doesn't see them. You only need that line if there's no component listening.

Based on what is written here, I realized that it is necessary to enable dummy_receiver: true in order to catch button clicks. Indeed, if for dummy_receiver: specify false -> dummy_receiver: false, the screen does not go out

dummy_receiver (Optional, boolean): Whether or not to enable the dummy receiver feature. The debugger will only accumulate bytes that are actually read or sent by a UART device component. This feature is useful when you want to debug all incoming communication, while no UART device component is configured for the UART bus (yet). This is especially useful for developers. Normally you’d want to leave this option disabled. Defaults to false.

[ssieb]

That would only be true if you didn't have the mitm component reading from the uart.