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esphome/tests/integration/fixtures/uart_mock_modbus_loopback.yaml
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esphome:
name: uart-mock-modbus-loopback
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
# Shared loopback fixture (see the shared_yaml markers in the test file);
# register spaces are disjoint so each test only observes its own entities.
uart_mock:
- id: virtual_uart_server
baud_rate: 9600
auto_start: true
debug:
on_tx:
- then:
- uart_mock.inject_rx:
id: virtual_uart_controller
data: !lambda return data;
- id: virtual_uart_controller
baud_rate: 9600
auto_start: true
debug:
on_tx:
- then:
- uart_mock.inject_rx:
id: virtual_uart_server
data: !lambda return data;
globals:
- id: reg10
type: uint16_t
initial_value: "100"
- id: reg11
type: uint16_t
initial_value: "200"
- id: reg12
type: uint16_t
initial_value: "300"
- id: reg13
type: uint16_t
initial_value: "0xABCD"
- id: reg30
type: uint16_t
initial_value: "0"
- id: reg40
type: uint16_t
initial_value: "5"
- id: reg50
type: uint16_t
initial_value: "0"
modbus:
- uart_id: virtual_uart_server
id: virtual_modbus_server
role: server
- uart_id: virtual_uart_controller
id: virtual_modbus_controller
role: client
turnaround_time: 10ms
modbus_controller:
- address: 1
modbus_id: virtual_modbus_controller
id: modbus_controller_1
update_interval: 1s
modbus_server:
- address: 1
modbus_id: virtual_modbus_server
registers:
- address: 0x01
value_type: U_WORD
read_lambda: return 259;
- address: 0x10
value_type: U_WORD
read_lambda: return id(reg10);
write_lambda: id(reg10) = x; return true;
- address: 0x11
value_type: U_WORD
read_lambda: return id(reg11);
write_lambda: id(reg11) = x; return true;
- address: 0x12
value_type: U_WORD
read_lambda: return id(reg12);
write_lambda: id(reg12) = x; return true;
- address: 0x13
value_type: U_WORD
read_lambda: return id(reg13);
- address: 0x30
value_type: U_WORD
read_lambda: return id(reg30);
write_lambda: id(reg30) = x; return true;
- address: 0x40
value_type: U_WORD
read_lambda: return id(reg40);
write_lambda: id(reg40) = x; return true;
- address: 0x50
value_type: U_WORD
read_lambda: return id(reg50);
write_lambda: id(reg50) = x; return true;
# Byte-based offset: 2 bytes -> register 0x11 (the old code folded it in as a
# register count, hitting 0x12). assumed_state keeps the switch write-only.
switch:
- platform: modbus_controller
modbus_controller_id: modbus_controller_1
name: "offset_switch"
register_type: holding
address: 0x10
offset: 2
assumed_state: true
# Reading switch, byte offset 6 -> register 0x13; the pre-fix resolution (0x16)
# would draw ILLEGAL_DATA_ADDRESS and never publish.
- platform: modbus_controller
modbus_controller_id: modbus_controller_1
name: "read_offset_switch"
register_type: holding
address: 0x10
offset: 6
bitmask: 0x1
# Coil switch whose write_lambda dispatches a holding-register write via `item`;
# returning an empty optional suppresses the default coil write.
- platform: modbus_controller
modbus_controller_id: modbus_controller_1
name: "cross_switch"
register_type: coil
address: 0x00
assumed_state: true
write_lambda: |-
item->write_single_register(0x30, x ? 1234 : 0);
return {};
# Active-low: the write_lambda inverts the wire value but the entity must still
# report the requested state (assumed_state keeps the register unpolled).
- platform: modbus_controller
modbus_controller_id: modbus_controller_1
name: "invert_switch"
register_type: holding
address: 0x40
assumed_state: true
write_lambda: |-
return !x;
# Uses the deprecated buffer parameter (legacy raw frame as words); the write
# must land and the deprecation warning must fire only once per entity.
number:
- platform: modbus_controller
modbus_controller_id: modbus_controller_1
name: "buf_number"
id: buf_number
address: 0x50
register_type: holding
value_type: U_WORD
min_value: 0
max_value: 1000
step: 1
write_lambda: |-
// Legacy raw frame as words: [addr 0x01 | fc 0x06], register 0x0050, value.
payload.push_back(0x0106);
payload.push_back(0x0050);
payload.push_back((uint16_t) x);
return {};
sensor:
- platform: modbus_controller
modbus_controller_id: modbus_controller_1
name: "plain_read"
address: 0x01
register_type: holding
value_type: U_WORD
# Custom PDU: read holding register 0x0001; device address and CRC are added
# by the hub. The lambda parses the big-endian register value.
- platform: modbus_controller
modbus_controller_id: modbus_controller_1
name: "custom_read"
custom_pdu: [0x03, 0x00, 0x01, 0x00, 0x01]
lambda: |-
if (data.size() < 2) return {};
return (float) ((data[0] << 8) | data[1]);
- platform: modbus_controller
modbus_controller_id: modbus_controller_1
name: "reg_10"
address: 0x10
register_type: holding
value_type: U_WORD
- platform: modbus_controller
modbus_controller_id: modbus_controller_1
name: "reg_11"
address: 0x11
register_type: holding
value_type: U_WORD
- platform: modbus_controller
modbus_controller_id: modbus_controller_1
name: "reg_12"
address: 0x12
register_type: holding
value_type: U_WORD
- platform: modbus_controller
modbus_controller_id: modbus_controller_1
name: "reg_30"
address: 0x30
register_type: holding
value_type: U_WORD
- platform: modbus_controller
modbus_controller_id: modbus_controller_1
name: "reg_40"
address: 0x40
register_type: holding
value_type: U_WORD
# Reports the server-side register so the test can observe that the deprecated buffer write landed.
- platform: template
name: "written_value"
id: written_value
update_interval: 0.5s
lambda: "return id(reg50);"
button:
- platform: template
name: "Start Scenario"
id: start_scenario_btn
# Nothing to start (mock is autostart); tests drive entities directly