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    Read 1wire temp sensor on Axon

    Official EVOK API
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    • N
      netman last edited by netman

      Hi,
      I am trying to detect 1wire temp sensor DS18B20 on my Axon L205 unit with Node-RED OS provided by Unipi.
      I tryied enabling EVOK OWBUS to scan sensor, but without success.

      I checked i2c bus to see presence of sensor:

      unipi@L205-sn57:~$ sudo i2cdetect -y 0
           0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f
      00:          -- -- -- -- -- -- -- -- -- -- -- -- --
      10: -- -- -- -- -- -- -- -- 18 -- -- -- -- -- -- --
      20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
      30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
      40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
      50: -- -- -- -- -- -- -- UU -- -- -- -- -- -- -- --
      60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- UU
      70: -- -- -- -- -- -- -- --
      
      unipi@L205-sn57:~$ ls -al /sys/bus/w1/devices/
      total 0
      drwxr-xr-x 2 root root 0 Jan 14 18:29 .
      drwxr-xr-x 4 root root 0 Jan 14 18:22 ..
      

      Here is EVOK config:

      [OWBUS_1]
      owbus = /dev/i2c-0                              ; Mandatory, scanned bus (--i2c=/dev/i2c-1:ALL or localhost:2122 or 'u' for USB dongle)
      interval = 3                                    ; Mandatory, [s] length of sensor reading
      scan_interval = 300                             ; Mandatory, [s] How often the scanning is done
      EVOK version = 2.3.6
      
      unipi@L205-sn107:~$ sudo lsmod
      Module                  Size  Used by
      unipi                 110592  6
      industrialio           57344  1 unipi
      brcmfmac              258048  0
      brcmutil               16384  1 brcmfmac
      rtc_ds1307             24576  0
      rtc_unipi              16384  0
      at24                   20480  0
      
      unipi@L205-sn107:~$ sudo ls -la /sys/bus/w1/
      ls: cannot access '/sys/bus/w1/': No such file or directory
      

      I tryied to search over forum, but this issue is discuss in context of RasberryPI/Neuron and I am not sure how relevant it is to Axon unit.

      Thanks

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      • N
        netman @netman last edited by

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