The issue *may* be that the relay board is overloading the power available from the LinkUSB and causing random resets of the DS2408. It depends on the power required to drive the relays on the Hobbyboards board.
Our relay board takes 160mA with all relays energised and this will cause an overload on a LinkUSB which can only supply 50mA. If you are powering it separately then this isn't going to be an issue, of course. Nigel On 18/11/16 14:33, Arne Raaen wrote: > Rele 6 - PIO.6 was NC. > > Rele 7 - PIO.7 was connected via about 5 m wire to a 2W LED light, and > was turned on /off independently once a day by a shell script using > owwrite. > I noticed the light was on at unexpected times. > > All switches on the HB card was set for rele operation. No inputs > were connected. > > > Arne > > > On 18.11.2016 13.17, Colin Reese wrote: >> Maybe dumb question, but are the additional inputs floating or >> connected? I noticed some interesting behavior on these as well when >> in use recently. >> >> Colin >> >> >> On Nov 18, 2016, at 1:45 AM, Arne Raaen <arn...@raaen.org >> <mailto:arn...@raaen.org>> wrote: >> >>> Hi, >>> >>> I have a HobbyBoards relay card based on DS2408, used with LinkUSB >>> >>> I used a routine (unconditionally) updating PIO.0 through PIO.5 every >>> minute. >>> >>> I observed that PIO.6 and PIO.7 would be activated at random intervals, >>> typically a few times per day or less. >>> >>> >>> I attempted >>> * use all free pairs for a better ground line >>> * plug the LinkUSB directly into the HB card >>> * change from perl + OWNET to python + pyownet >>> >>> Nothing helped reliably. >>> >>> I than changed the code to read owserver first, and update only when >>> needed, which reduces owserver writes from 6 per minute to a few times >>> per day. >>> >>> Since then I have not seen any unwanted activation of PIO.6 and PIO.7. >>> >>> (Other owserver actvity is reading mainly temperature sensors, every >>> minute) >>> >>> >>> >>> >>> >>> Arne >>> >>> >>> ------------------------------------------------------------------------------ >>> _______________________________________________ >>> Owfs-developers mailing list >>> Owfs-developers@lists.sourceforge.net >>> <mailto:Owfs-developers@lists.sourceforge.net> >>> https://lists.sourceforge.net/lists/listinfo/owfs-developers >> >> >> ------------------------------------------------------------------------------ >> >> >> _______________________________________________ >> Owfs-developers mailing list >> Owfs-developers@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/owfs-developers > > > > > ------------------------------------------------------------------------------ > > > _______________________________________________ > Owfs-developers mailing list > Owfs-developers@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/owfs-developers
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