Hi Tony, When the supply voltage drops below a certain level, the microcontroller starts to behave in an unpredictable way. Usually, after a reset (without reprogramming) the microcontroller should be working again.
If your motes work after a reset (without reprogramming), then maybe you would want to enable the brown-out detection. The brown-out detection will reset the mote automatically for you (details see in the data-sheet). This can be enabled with a programmable fuse (BODEN). This detection will, however, consume additional energy even in sleep modes. Cheers, Urs Tony Han wrote: > Hi All, > > Is there anyone have the following problem on your MICAZ? If your power > supply is not stable, say, on and off rapidly, you will finally loss the > functionality on your mote. Only after you reinstall that mote, it can start > work again. > > I had this question is because when we use solar panel and car battery as an > out-door power source, after months operation without problem. then the > power balance decreased until un-sufficient for mote during the night. But > in the next day, when sun rise, it supposes to work due to increased car > battery voltage. When we send people to check during the day, power is > enough, but MICAZ was dead. > > Anyone have any idea about it? > > Thank you very much > > Tony _______________________________________________ Tinyos-help mailing list Tinyos-help@millennium.berkeley.edu https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
