After update, pull-up stopped working

Hi all,

A update for my ESP-01 (esp8266 relay) was available on ESPhome on my hassio. Now my ESP is not reacting anymore on the Pullup. I also flashed the ESP again manually (pyflasher), I am not able to upload the .bin file on the 9600 baud, only on higher bauds. But the ESP-01 only reads signals from 9600 baud rate. So I assume this is the issue. Does anyone know how to fix this?

Please see my code below:

esphome:
  name: doorbell
  platform: ESP8266
  board: esp01_1m

wifi:
  .....

  # Enable fallback hotspot (captive portal) in case wifi connection fails
  ap:
    .....

captive_portal:

# Enable logging
logger:
  baud_rate: 0

# Enable Home Assistant API
api:

ota:

# Enable Web server.
web_server:
  port: 80

# Sync time with Home Assistant.
time:
  - platform: homeassistant
    id: homeassistant_time

# Text sensors with general information.
text_sensor:
  # Expose ESPHome version as sensor.
  - platform: version
    name: Doorbell ESPHome Version
  # Expose WiFi information as sensors.
  - platform: wifi_info
    ip_address:
      name: Doorbell IP
    ssid:
      name: Doorbell SSID
    bssid:
      name: Doorbell BSSID

# Sensors with general information.
sensor:
  # Uptime sensor.
  - platform: uptime
    name: Doorbell Uptime

  # WiFi Signal sensor.
  - platform: wifi_signal
    name: Doorbell WiFi Signal
    update_interval: 60s

# Global to store the on/off state of the chime
globals:
  - id: chime
    type: bool
    restore_value: true
    initial_value: 'true'

uart:
  tx_pin: GPIO1
  baud_rate: 9600

# Exposed switches.
switch:
  # Switch to restart the doorbell.
  - platform: restart
    name: Doorbell Restart

  # Switch to turn on/off the chime.
  - platform: template
    name: Doorbell Chime
    id: relay
    optimistic: true
    turn_on_action:
      - uart.write: [0xA0, 0x01, 0x01, 0xA2] # turn on Relay
    turn_off_action:
      - uart.write: [0xA0, 0x01, 0x00, 0xA1]  

  # Switch to turn on/off chime when
  # doorbell button is pushed.
  #
  # It creates a "virtual" switch based
  # on a global variable.
  - platform: template
    name: Doorbell Chime Active
    id: chime_active
    restore_state: false
    turn_on_action:
      - globals.set:
          id: chime
          value: 'true'
    turn_off_action:
      - globals.set:
          id: chime
          value: 'false'
    lambda: |-
      return id(chime);  

# Binary sensor representing the
# Doorbell button push.
binary_sensor:
  - platform: gpio
    id: button
    name: Doorbell Button
    pin:
      # Connected to GPIO on the ESP-01S.
      number: GPIO2
      mode: INPUT_PULLUP
      inverted: true
    filters:
      # Small filter, to debounce the button press.
      - delayed_on: 1s # 25ms
      - delayed_off: 1s # 25ms
    on_press:
      # Only turn on the chime when it is active.
      then:
        if:
          condition:
            - switch.is_on: chime_active
          then:
            - switch.turn_on: relay
            # - delayed_on: 2s
            # - max_length: 2s
    on_release:
      # On release, turn off the chime.
      - switch.turn_off: relay