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Raspberry Pi relay board

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  • 11-11-2015 3:11pm
    #1
    azzeretti
    Registered Users Posts: 1,477 ✭✭✭


    This is a a long shot but:

    I don't suppose anyone has ever used this relay board with an Rpi2?

    I have it connected to the Pi but i2cdetect isn't detecting it. There is some sample code on that page but it refers to the address as /dev/i2c-x. There are jumpers on the board but changing these (to the correct address) doesn't help.

    Has anyone used one and/or any ideas?

    Also, I have a few of them and they all aren't detected by the Pi!


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    #2
    Tom Dunne
    Registered Users Posts: 23,212 ✭✭✭✭Tom Dunne


    Have you tried the usual Unix troubleshooting commands to see what is going on?

    Off the top of my head, dmesg. But there's many more that escape me right now.


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    #3
    GreenWolfe
    Registered Users Posts: 1,731 ✭✭✭GreenWolfe


    Is I2C enabled in raspi-config?


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    #4
    PrzemoF
    Registered Users Posts: 1,931 ✭✭✭PrzemoF


    Not this board, but I have some i2c stuff running with RPI. I think i2c module is not (or was not) enabled by default.


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    #5
    syklops
    Closed Accounts Posts: 18,966 ✭✭✭✭syklops


    Whats the output of: 
    lsmod | grep i2c


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    #6
    azzeretti
    Registered Users Posts: 1,477 ✭✭✭azzeretti


    Yeah - I got this working. Turned out to be a bit of a blonde moment - the i2c module was blacklisted, by default. Removing the blacklist enabled the module. All good now, thanks.


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