| 18,7 → 18,7 |
|---|
| //#define sht_data_pin PIN_D0 |
| //#define sht_clk_pin PIN_D1 |
| |
| #include <math.h> |
| //#include <math.h> |
| |
| |
| #define noACK 0 |
| 205,7 → 205,7 |
|---|
| |
| //***** Function to measure SHT75 temperature ***** |
| |
| int16 sht_measuretemp (void) |
| int16 sht_measuretemp () |
| { |
| int1 ack; |
| int16 iobyte; |
| 221,7 → 221,7 |
|---|
| |
| //***** Function to measure SHT75 RH ***** |
| |
| int16 sht_measurehumid (void) |
| int16 sht_measurehumid () |
| { |
| int1 ack; |
| int16 iobyte; |
| 242,8 → 242,8 |
|---|
| const float C1=-2.0468; // for 12 Bit RH |
| const float C2=+0.0367; // for 12 Bit RH |
| const float C3=-0.0000015955; // for 12 Bit RH |
| const float T1=+0.01; // for 12 Bit RH |
| const float T2=+0.00008; // for 12 Bit RH |
| // const float T1=+0.01; // for 12 Bit RH |
| // const float T2=+0.00008; // for 12 Bit RH |
| float rh; |
| |
| //calculate temperature reading |
| 285,15 → 285,15 |
|---|
| } |
| |
| //-------------------------------------------------------------------- |
| float calc_dewpoint(float h,float t) |
| //float calc_dewpoint(float h,float t) |
| //-------------------------------------------------------------------- |
| // calculates dew point |
| // input: humidity [%RH], temperature [K] |
| // output: dew point [K] |
| { float k,dew_point ; |
| |
| k = (log10(h)-2)/0.4343 + (17.62*t)/(243.12+t); |
| dew_point = 243.12*k/(17.62-k); |
| return dew_point; |
| } |
| //{ float k,dew_point ; |
| // |
| // k = (log10(h)-2)/0.4343 + (17.62*t)/(243.12+t); |
| // dew_point = 243.12*k/(17.62-k); |
| // return dew_point; |
| //} |
| |