I've the same issue.  Version owfs  2.8p15-1 is working fine, running Debian 
GNU/Linux 7 on a beaglebone.

This schematic: https://fstab.nl/en/lcd_owfs

When i switch to version owfs-3.1p1   it doesn't work anymore.

Commands like this:

  owwrite /29.09C211000000/LCD_H/clear 1
  owwrite /29.09C211000000/LCD_H/screenyx 1,1:Kr19.6
  owwrite /29.09C211000000/LCD_H/screenyx 1,9:Bn:7.4



Nico

Andy Carter wrote:
> I have had 1-wire devices set up and working successfully for some years but
> have problems with a new Louis Swart 20x4 LCD.
>
> My setup is a Sheepwalk Electronics DS2482-800 i2c based RPI3 host adapter on
> a Raspberry Pi2 currently running raspbian jessie and default owfs-2.9p8.
> Logging/control is with fhem, a perl based home automation application.
>
> Connecting the LCD to the bus correctly identifies it.
> I can send text strings to it but it misses the first character and adds || to
> the end eg. sending fred displays red||.
> In order to turn the backlight on I have to send two digits such as 11, a
> single 1 is ignored.
>
> A net search reveals a few similar scattered reports but no solution as far as
> I can see.
>
>
> I have set up another Pi with an earlier 26 pin version of the same host
> adapter.
>
> A raspbian jessie install (owfs-2.9p8) shows the same as above - to be
> expected.
>
> A raspbian wheezy install (default owfs-2.8p15) shows all characters sent
> correctly, with no trailing ||.
>
> Replacing owfs-2.9p8 files with owfs-2.8p15 versions on jessie shows all
> characters sent correctly, with no trailing ||.
>
> I have also tried armhf owfs-3.1p1-2 versions on jessie but that shows the
> same issues as owfs-2.9p8
>
> I borrowed a perl script from elsewhere on this list, running it from an AMD
> jessie desktop to the Pi server produces the same results as above ie.
> owfs-2.8p15 OK, owfs-2.9p8 amd owfs-3.1p1-2 not OK.
>
> I don't have any hardware to set up 1-wire on anything other than the Pi
> unfortunately.
>
> Any thoughts on where I should go from here?
>
> TIA
>
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