MCP23017 Binding

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 works nicely with openHAB 1.8.3 and 2.0.0 runtimes.

Binding Configuration

No special configuration is needed.

Item Configuration

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.
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