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1-wire plus is not being seen with i2cdetect

1308 Views - Created 12/11/2016

12/11/2016

Posted by:
tfrohling

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Trying to use the 1-wire plus adapter but it's not being seen.  I've followed all the instructions for adding the device modules to the various configs.  The device is created.  I'm using the latest raspbian build.

root@scoring:/etc# uname -a
Linux solarwater 4.4.26-v7+ #915 SMP Thu Oct 20 17:08:44 BST 2016 armv7l GNU/Linux

root@scoring:/etc# ls -l /dev/*i2c*
crw-rw---- 1 root i2c 89, 1 Nov 11 19:33 /dev/i2c-1

In another lookup of this problem it was suggested to remove the module and add it again,

root@scoring:/etc# lsmod | grep i2c
i2c_dev                 5859  0
i2c_bcm2708             4834  0
root@scoring:/etc# rmmod i2c_bcm2708; modprobe i2c_bcm2708
root@scoring:/etc# i2cdetect -y 1
     0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f
00:          -- -- -- -- -- -- -- -- -- -- -- -- --
10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
70: -- -- -- -- -- -- -- --                       

Is it possible there is a kernel problem?

thanks for any help.

ted

12/11/2016

Posted by:
andrew

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Location:
United Kingdom

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Hi Ted

Have you tried going through our tutorial for setting up the I2C port?  It may be worth checking the 5V and GND pins on the front corner of the 1 Wire board with a multimeter to make sure there is voltage getting to the circuit.

AB Electronics UK Tech Support

13/11/2016

Posted by:
tfrohling

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I did follow all the steps in the tutorial.  Voltage is 1 V.  So I got a problem there.  Thanks for the diagnosing of this. Interesting that I have the problem with two different Pi 2+ and two different 1-wire plus boards.

13/11/2016

Posted by:
andrew

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Location:
United Kingdom

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Only showing 1V on the 5V pin is interesting, it should have the same voltage as the 5V pin on the Raspberry Pi.  Have you soldered the power jumper onto the 1 Wire board?  It should go in the position shown on the photo below.

Post image

AB Electronics UK Tech Support

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