Hi all:

   I am studying tinyOS2.x now,. I an using mica2(atm128) and sht11  to abtain 
temperature and humidity information. 

On this webside, 

http://mail.millennium.berkeley.edu/pipermail/tinyos-help/2010-March/045214.html
 

I found the similar problem. But I could not find help.

   When I debug the program, I find the follow subfunction always return 'FAIL'.

error_t waitForResponse() {

     call DATA.makeInput();

     call DATA.set();

     call CLOCK.set();

     if (call DATA.get()) {

       // the device didn't pull the DATA line low

       // the command wasn't received or acknowledged

       return FAIL;

     }

     call CLOCK.clr();

     return SUCCESS;

   }

   Can someone give me some help? Or send me some related tinyos files, such as 
SensirionSht11LogicP.nc.  

  Thanks in advance.

   Best wishes!

Joshua
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