-**skip_updates**: (*Optional*, int): By default all sensors of of a modbus_controller are updated together. For data points that don't change very frequently updates can be skipped. A value of 5 would only update this sensor range in every 5th update cycle
-**register_count**: (*Optional*, int): only required for uncommon response encodings or to :ref:`optimize modbus communications<modbus_register_count>`
The number of registers this data point spans. Overrides the defaults determined by ``value_type``.
If no value for ``register_count`` is provided, it is calculated based on the register type.
The default size for 1 register is 16 bits (1 Word). Some devices are not adhering to this convention and have registers larger than 16 bits. In this case ``register_count`` and ``response_size`` must be set. For example, if your modbus device uses 1 registers for a FP32 value instead the default of two set ``register_count: 1`` and ``response_size: 4``.
-**force_new_range**: (*Optional*, boolean): If possible sensors with sequential addresses are grouped together and requested in one range. Setting ``force_new_range: true`` enforces the start of a new range at that address.
-**custom_data** (*Optional*, list of bytes): raw bytes for modbus command. This allows using non-standard commands. If ``custom_data`` is used ``address`` and ``register_type`` can't be used.
offset from start address in bytes. If more than one register is read a modbus read registers command this value is used to find the start of this datapoint relative to start address. The component calculates the size of the range based on offset and size of the value type
The value for offset depends on the register type. If a binary_sensor is created from an input register the offset is in bytes. For coil and discrete input resisters the LSB of the first data byte contains the coil addressed in the request. The other coils follow toward the high-order end of this byte and from low order to high order in subsequent bytes. For the registers offset is the position of the relevant bit.
To get the value of the coil register 2 can be retrived using address: 2 / offset: 0 or address: 0 / offset 2
Example
..code-block:: yaml
binary_sensor:
- platform: modbus_controller
modbus_controller_id: epever
id: battery_internal_resistance_abnormal
name: "Battery internal resistance abnormal"
register_type: read
address: 0x3200
bitmask: 0x80 #(bit 8)
Parameters passed into the lambda
-**x** (bool): The parsed float value of the modbus data
-**data** (std::vector<uint8_t): vector containing the complete raw modbus response bytes for this sensor
-**item** (const pointer to a ModbusBinarySensor object): The sensor object itself.
Possible return values for the lambda:
-``return true/false;`` the new value for the sensor.
