4 Replies Latest reply on Oct 10, 2015 4:55 AM by IntelAnonymous

    i2c-1: Are 0x20, 0x21, 0x22, 0x23 reserved addresses?


      I am currently trying to get access to a MCP23017. I grounded A0,A1,A2 of the MCP23017, therefore the address should be 0x20 according to the data sheet. When running the intel edison on the big arduino breakout board WITHOUT the MCP23017 I get the following output:


      i2c arduino.png


      When using the intel edison with my own hardware and the MCP23017 connected, I get the following output:


      i2c own.png


      It seems that the MCP23017 is being detected, however I can not access it (UU). What's blocking me from accessing the MCP23017?