On 30/11/16 10:18, Robin Gilks wrote: >> Hello, >> >> >> I have just connected a DS2438, which seems to be reporting a A6 family >> code, and thus not giving the correct input details. >> >> >> w1_master_driver w1_bus_master1: Family a6 for a6.5000009b8f5f.f6 is not >> registered. >> >> >> On owfs 3.1p1 >> > I've been using DS2438 battery monitor devices for a number of years and > they have a family code of 0x26 NOT 0xA6. > > This sounds like a fake similar to to ones I got burnt with recently, a > supposed DS2413 with a family code of 0x85 instead of the correct code of > 0x3A. I'm pretty sure that there are no genuine Dallas/Maxim devices with > a family code where the MSB is set. > > Hmm, yes, could be. We are seeing increased numbers of counterfeit devices appearing, mostly, I have to say, iButtons, but I've heard of other 1-wire chips too. With the iButtons one of the things that seems to happen is that failed devices are stolen from the disposal bins at Maxim's facility in the Philippines and shipped off to China where they are disassembled and re-packaged with new batteries. We got badly burned when we bought $16,000 worth of DS1923s from a reputable second-source company in the US who had gone to the lengths of disassembling a couple of them, checking the dies and deciding they were originals. Unfortunately the Chinese had omitted to set the register that specified they were DS1923s and they read as DS2422s.
Be very careful when offered cheap iButtons... Nigel ------------------------------------------------------------------------------ _______________________________________________ Owfs-developers mailing list Owfs-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/owfs-developers
