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feat: add ignoreslaveaddress parameter #130

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feat: add ignoreslaveaddress parameter #130

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147d729
Add tests for ignoreslaveaddress feature
penguintamer Apr 3, 2024
870dfe3
Add ignoreslaveaddress option to _extract_payload()
penguintamer Apr 3, 2024
d2eae14
Expose ignoreslaveaddress option in _perform_command()
penguintamer Apr 3, 2024
d2d0e57
Expose ignoreslaveaddress in _generic_command()
penguintamer Apr 3, 2024
43aaa67
Expose ignoreslaveaddress in high-level methods
penguintamer Apr 3, 2024
1ea2caa
black
penguintamer Apr 3, 2024
8d3c88b
docs: document ignoreslaveaddress feature
penguintamer Apr 4, 2024
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16 changes: 16 additions & 0 deletions docs/advancedusage.rst
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Original file line number Diff line number Diff line change
Expand Up @@ -226,6 +226,22 @@ Add this to :func:`._extract_payload` function, after the argument validity test
pass


Handling instrument address mismatch
--------------------------------------------------------------------------
Some commands or instrument access patterns may result in responses whose reported slave
address differs from the address used to send the command. Examples include sending a
command to change the device's address or using a "universal address" to communicate
with a single connected device. Note that you should never use a "universal address" when
more than one device is connected to the bus.

To ignore the slave address returned by a command, set the "ignoreslaveaddress" parameter
to True:

instr = minimalmodbus.Instrument('/dev/ttyUSB0', 1)
# change device's address to 23 using register 0x17
instr.write_register(0x17, 23, ignoreslaveaddress=True)


Install or uninstalling a distribution
--------------------------------------------------------------------------

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