How to set read-only property of simulated device(eg. magnet-sensor) to test automated rules?

[ifcarpediem]

I want to test some automated rules, so I need to change some properties of sensors, but they are read-only.

Examples: illumination_sensor

miiocli device --ip 127.0.0.1 --token 00000000000000000000000000000000 raw_command dump_properties '{"siid": 2}'

Running command raw_command
[{'siid': 2, 'piid': 1, 'prop': 'Illumination', 'value': 80073}]

miiocli device --ip 127.0.0.1 --token 00000000000000000000000000000000 raw_command set_properties '[{"siid":2,"piid":1, "value": 1}]'

Running command raw_command
ERROR:miio.click_common:Exception: {'code': -3, 'error': "Exception <class 'pydantic.v1.error_wrappers.ValidationError'>: 1 validation error for SimulatedMiotProperty\ncurrent_value\n Tried to set read-only property (type=value_error)"}
Traceback (most recent call last):
File "/usr/local/lib/python3.9/site-packages/miio/click_common.py", line 54, in call
return self.main(*args, **kwargs)
File "/usr/local/lib/python3.9/site-packages/click/core.py", line 1082, in main
rv = self.invoke(ctx)
File "/usr/local/lib/python3.9/site-packages/click/core.py", line 1697, in invoke
return _process_result(sub_ctx.command.invoke(sub_ctx))
File "/usr/local/lib/python3.9/site-packages/click/core.py", line 1697, in invoke
return _process_result(sub_ctx.command.invoke(sub_ctx))
File "/usr/local/lib/python3.9/site-packages/click/core.py", line 1443, in invoke
return ctx.invoke(self.callback, **ctx.params)
File "/usr/local/lib/python3.9/site-packages/click/core.py", line 788, in invoke
return __callback(*args, **kwargs)
File "/usr/local/lib/python3.9/site-packages/miio/click_common.py", line 305, in wrap
result = kwargs["result"] = func(*args, **kwargs)
File "/usr/local/lib/python3.9/site-packages/click/decorators.py", line 92, in new_func
return ctx.invoke(f, obj, *args, **kwargs)
File "/usr/local/lib/python3.9/site-packages/click/core.py", line 788, in invoke
return __callback(*args, **kwargs)
File "/usr/local/lib/python3.9/site-packages/miio/click_common.py", line 270, in command_callback
return miio_command.call(miio_device, *args, **kwargs)
File "/usr/local/lib/python3.9/site-packages/miio/click_common.py", line 218, in call
return method(*args, **kwargs)
File "/usr/local/lib/python3.9/site-packages/miio/click_common.py", line 185, in _wrap
return func(self, *args, **kwargs)
File "/usr/local/lib/python3.9/site-packages/miio/device.py", line 141, in raw_command
return self.send(command, parameters)
File "/usr/local/lib/python3.9/site-packages/miio/device.py", line 122, in send
return self._protocol.send(
File "/usr/local/lib/python3.9/site-packages/miio/miioprotocol.py", line 215, in send
self._handle_error(payload["error"])
File "/usr/local/lib/python3.9/site-packages/miio/miioprotocol.py", line 276, in _handle_error
raise DeviceError(error)
miio.exceptions.DeviceError: {'code': -3, 'error': "Exception <class 'pydantic.v1.error_wrappers.ValidationError'>: 1 validation error for SimulatedMiotProperty\ncurrent_value\n Tried to set read-only property (type=value_error)"}

[rytilahti]

That is not currently possible without changing the code, but you could change it manually for your testing:

python-miio/miio/devtools/simulators/miotsimulator.py

Lines 69 to 70 in 0aa4df3

	if MiotAccess.Write not in values["access"]:
	raise ValueError("Tried to set read-only property")

I can see that being able to set values (also for read-only) is useful, so we could find a solution (e.g., adding an option to allow this, or have a separate method to set read-onlys). What do you think?