Revision 0:973b5707f517, committed 2020-05-06

Comitter:

thecreid1

Date:

Wed May 06 14:56:32 2020 +0000

Commit message:

Firmware;

Changed in this revision

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/phread.cpp	Wed May 06 14:56:32 2020 +0000
@@ -0,0 +1,26 @@
+#include "phread.h"
+
+PHread::PHread (PinName data_pin) : 
+    _datapin (data_pin)
+{}
+
+float PHread::get_pH(){
+  float mv_voltage = 0;
+  float ph_val=0;
+
+    
+  for(int i=0;i<10;i++)       //Get 10 sample value from the sensor for smooth the value
+  { 
+    mv_voltage += (_datapin.read() * 3.1); 
+    wait_ms(10);
+  }
+  mv_voltage /= 10;
+  
+  //formuala to convert from voltage signal to ph
+  //from atlasScientific
+  ph_val = (-5.6548 * mv_voltage) + 15.509; 
+  
+  
+  
+    return ph_val;
+}
\ No newline at end of file

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/phread.h	Wed May 06 14:56:32 2020 +0000
@@ -0,0 +1,21 @@
+#ifndef _phread_H_
+#define _phread_H_
+
+#include "mbed.h"
+
+class PHread {
+    public:
+        PHread (PinName data_pin);
+
+        /** Reads the pH
+        * 
+        * @returns pH
+        */
+        float get_pH();
+
+    private:
+        AnalogIn _datapin;
+
+};
+
+#endif
\ No newline at end of file