SHT_75 with picbasic pro

[ScaleRobotics]

Here is some code for the SHT11 for calculating dewpoint. I have not compared datasheets to know how similar (or not) they are. But this may help:

http://www.picbasic.co.uk/forum/show...=3851#post3851

That is quite the equation! From NavMicroSystems post above:

'** Dewpoint Calculation
    ' See: SENSIRION Application Note "Dewpoint Calculation"
    ' logEW = (0.66077+7.5*T/(237.3+T)+(log(RH)-2)
      ' DP = ((0.66077-logEW)*237.3)/(logEW-8.16077)

DewPoint:
  
  TempDP=Temp/10
  logEW=6608
  sign=TempDP.bit15
  wz=ABS TempDP
  wx=(7*wz)+(wz/2)                              
  wy=2373+wz
  wj=wx/wy
   For ix=15 to 0 step -1
    wx=(wx//wy)<<1
    wz.bit0(ix)=wx/wy
   Next
  wx=(-sign^((wj*10000)+(wz**10000)))+sign        
  logEW=wx+logEW
  wx=RHtc
  wj=(NCD wx) - 1
  wx=wx<<(15-wj)
  wz=0
  For ix=14 to 0 step -1
    wy=wx**wx
    wz.bit0(ix)=wy.bit15
    bt=~wy.bit15
    wx=(wy<
   Next
  
  wx=((wj*4000)**49321)+(wz**6021)
  logEW=wx+logEW-30000            
  sign=logEW.bit15
  logEW=(-sign^(((ABS logEW)+2)/4))+sign
  wx=1652-logEW
  sign=~wx.bit15
  wx=ABS wx
  wy=20402-logEW
  wj=wx/wy
  
   For ix=15 to 0 step -1
    wx=(wx//wy)<<1
    wz.bit0(ix)=wx/wy
   Next
  
  DP=((23730**wz)+5)/10
  DP=(-sign^DP)+sign

And attached is an application note for dew point calculations.

[iw2fvo]

Hi scalerobotics,

yes, the sht_11 has the same interface characteristics of the sht_75 so the code would be OK,

Thanks for helping me,

Regards,
Ambrogio
IW2FVO

Here is some code for the SHT11 for calculating dewpoint. I have not compared datasheets to know how similar (or not) they are. But this may help:

http://www.picbasic.co.uk/forum/show...=3851#post3851