temperature

src/buoy_wemos/temperature/temperature.h

@@ -0,0 +1,52 @@
+#include "../adc/adc.h"
+
+namespace temperature {
+    // #define TEMP_PIN A0
+    #define TEMP_VOLAGE 3.3
+
+    int adc_channel;
+
+    // https://arduinomodules.info/ky-013-analog-temperature-sensor-module/
+
+    float R1 = 10000; // value of R1 on board
+    float logR2, R2, T;
+    float c1 = 0.001129148, 
+        c2 = 0.000234125, 
+        c3 = 0.0000000876741;
+    //steinhart-hart coeficients for thermistor
+
+    void init(int adc_ch) {
+        adc_channel = adc_ch;
+        // pinMode(TEMP_PIN, INPUT);
+    }
+
+    float read() {
+        int v = adc::read(adc_channel) * 1024.0;
+        // int v = analogRead(TEMP_PIN);
+
+        R2 = R1 * (1023.0 / (float)v - 1.0); // calculate resistance on thermistor
+        logR2 = log(R2);
+        T = (1.0 / (c1 + c2*logR2 + c3*logR2*logR2*logR2)); // temperature in Kelvin
+        T = T - 273.15; // convert Kelvin to Celcius
+        // T = (T * 9.0)/ 5.0 + 32.0; //convert Celcius to Farenheit
+        return T;
+    }
+}
+
+/*
+    example:
+
+void setup()
+{
+  Serial.begin(9600);
+  initialize_temp();
+}
+ 
+void loop()
+{
+    Serial.print("Temperature:\t\t"); 
+    Serial.println(read_temp());
+
+    delay(1000);                                     //waiting a second
+}
+*/