Diff: sci_sensor.cpp

Revision:

1:ad071d4ef366

Child:

2:2a3d5370d769

diff -r e695e0f174d2 -r ad071d4ef366 sci_sensor.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/sci_sensor.cpp	Mon Nov 09 17:32:44 2020 +0000
@@ -0,0 +1,33 @@
+#include "sci_sensor.h"
+
+sci_sensor::sci_sensor(PinName in1, PinName in2): _in1(in1), _in2(in2)
+{
+    c1 = -1481.96;
+    c2 = 2196200;
+    c3 = 1.8636;
+    c4 = 0.00000388;
+    
+    la = -2;
+    lb = 3.8062;
+}
+
+//sci_sensor::LM20(PinName in2): _in2(in2)
+//{
+
+//}
+
+float sci_sensor::temp()
+{
+    float volt = _in1.read()*3.3;
+    float T = c1+sqrt(c2 + (c3-volt)/c4);
+    return T;
+
+}
+
+float sci_sensor::phc()
+{
+    float volt = _in2.read()*3.3;
+    float res = (3.3*3300/volt - 3300)/1000.00; // 3300 is the resistance of my resistor
+    float lux = pow(10, la*log10(res)+lb); // A and B values were found using the graph for lux vs. resistance
+    return lux;
+}
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