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    Re: need help with PBP, I2C and MCP23017

    in Australia I drive on the other side of the road, its horses for courses
    pbp uses 8bit address scheme




    so A0=0 A1=0 A2=0
    plugged into formula
    pbp i2c address = (% 0 1 0 0 A2 A1 A0...
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    Re: need help with PBP, I2C and MCP23017

    Arduino use a 7 bit i2c address pbp uses a 8 bit address.
    you make no mention of how you have AO,A1,A2 on the expander connected

    pbp i2c address = (% 0 1 0 0 A2 A1 A0 )<<1 for a mcp23017
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