Using as a BLE keyboard

Turn your Buttfinity module into a BLE keyboard by adding the following to you ESPHome config (in ESPHome Device Builder click “Edit”).

external_components:
  - source: github://dmamontov/esphome-blekeyboard

ble_keyboard:
  id: my_ble_keyboard
  name: "Buttfinity BLE Keyboard"
  manufacturer_id: "Buttfinity"
  reconnect: true
  battery_level: 50
  buttons: true

Now you can add buttons to your Buttfinity that will send keystrokes to your computer like this (you might have to change the pin):

# type "hello world" when button is pressed
binary_sensor:
  - platform: gpio
    pin:
      number: GPIO22
      mode: INPUT_PULLUP
      inverted: true
    name: "Button"
    on_press:
      - ble_keyboard.print:
          id: my_ble_keyboard 
          text: "hello world"

See esphome-blekeyboard for more information.