esphome:
  name: uart-mock-modbus-test

host:
api:
logger:
  level: VERBOSE

external_components:
  - source:
      type: local
      path: EXTERNAL_COMPONENT_PATH

# Dummy uart entry to satisfy modbus's DEPENDENCIES = ["uart"]
# The actual UART bus used is the uart_mock component below
uart:
  baud_rate: 115200
  port: /dev/null

uart_mock:
  - id: virtual_uart_dev
    baud_rate: 9600
    rx_full_threshold: 120
    rx_timeout: 2
    # auto_start must be false to avoid races: the test presses the
    # "Start Scenario" button only after subscribing to states.
    auto_start: false
    debug:
    responses:
      - expect_tx: [0x01, 0x03, 0x00, 0x03, 0x00, 0x01, 0x74, 0x0A] # Read holding register 3 on device 1 (basic_register)
        inject_rx: [0x01, 0x03, 0x02, 0x01, 0x03, 0xF9, 0xD5] # Return value 0x0103 (hex) = 259 (dec)
      - expect_tx: [0x01, 0x03, 0x00, 0x05, 0x00, 0x01, 0x94, 0x0B] # Read holding register 5 on device 1 (delayed_response)
        delay: 100ms # Shorter than modbus send_wait_time of 200ms, should succeed
        inject_rx: [0x01, 0x03, 0x02, 0x00, 0xFF, 0xF8, 0x04] # Return value 0x00FF (hex) = 255 (dec)
      - expect_tx: [0x02, 0x03, 0x00, 0x07, 0x00, 0x01, 0x35, 0xF8] # Read holding register 7 on device 2 (late_response)
        delay: 300ms # Longer than modbus send_wait_time of 200ms, should cause timeout
        inject_rx: [0x02, 0x03, 0x02, 0x00, 0xF0, 0xFC, 0x00] # Return value 0x00F0 (hex) = 240 (dec)
      - expect_tx: [0x03, 0x03, 0x00, 0x09, 0x00, 0x01, 0x55, 0xEA] # Read holding register 9 on device 3 (no_response)
        inject_rx: [] # No response, should cause timeout
      - expect_tx: [0x01, 0x03, 0x00, 0x0A, 0x00, 0x01, 0xA4, 0x08] # Read holding register A on device 1 (exception_response)
        inject_rx: [0x01, 0x83, 0x02, 0xC0, 0xF1] # Exception response with code 2 (illegal data address)

modbus:
  uart_id: virtual_uart_dev
  send_wait_time: 200ms
  turnaround_time: 10ms

modbus_controller:
  - address: 1
    id: modbus_controller_ok
    max_cmd_retries: 2
    update_interval: 1s
  - address: 2
    id: modbus_controller_slow
    max_cmd_retries: 0
    update_interval: 1s
  - address: 3
    id: modbus_controller_offline
    max_cmd_retries: 0
    update_interval: 1s

sensor:
  - platform: modbus_controller
    name: "basic_register"
    address: 0x03
    register_type: holding
    modbus_controller_id: modbus_controller_ok
  - platform: modbus_controller
    name: "delayed_response"
    address: 0x05
    register_type: holding
    modbus_controller_id: modbus_controller_ok
  - platform: modbus_controller
    name: "late_response"
    address: 0x07
    register_type: holding
    modbus_controller_id: modbus_controller_slow
  - platform: modbus_controller
    name: "no_response"
    address: 0x09
    register_type: holding
    modbus_controller_id: modbus_controller_offline
  - platform: modbus_controller
    name: "exception_response"
    address: 0x0A
    register_type: holding
    modbus_controller_id: modbus_controller_ok

button:
  - platform: template
    name: "Start Scenario"
    id: start_scenario_btn
    on_press:
      - lambda: "id(virtual_uart_dev).start_scenario();"