MCP23017 Binding
Documentation of the MCP23017 binding Bundle
This binding provides native access for MCP23017 16 bit bidirectional I/O expander on I2C bus. Please consider datasheet for IC for future information.
This binding will be available from 1.9.0 onwards or is available from corresponding snapshot. Attention: This binding is not available in download packages earlier than 1.9.0. Anyhow it works nicely with OpenHab 1.8.3. Simply copy jar file found on Openhab cloudbees server into addons subdirectory and restart Openhab service.
Since MCP23017 is digital IO expander on I2C bus, only two types of items are supported:
Contact for pins that used as digital input and Switch for digital output. Find the
example below.
No special configuration within openhab.cfg is needed.
Contact Test1 "Test 1" (Tests) { mcp23017="{ address:21, pin:'A0', mode:'DIGITAL_INPUT'}" }
configures pin 0 at bank A (GPA0 on datasheet) as input of the IC on address 0x20
Switch Test2 "Test 2" (Tests) { mcp23017="{ address:21, pin:'B1', mode:'DIGITAL_OUTPUT', defaultState:'LOW'}" }
configures pin 1 at bank B (GPB1 on datasheet) as output of the IC on adress 0x21
ℹ Please find all documentation for openHAB 2 under http://docs.openhab.org.
The wiki pages here contain (outdated) documentation for the older openHAB 1.x version. Please be aware that a lot of core details changed with openHAB 2.0 and this wiki as well as all tutorials found for openHAB 1.x might be misleading. Check http://docs.openhab.org for more details and consult the community forum for all remaining questions.
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