commit e6a06aab2593d121fa18a951849556ac5d686596
parent f2db065227f9d1d855f8471103235b12d939c25d
Author: Jacob Neplokh <me@jacobneplokh.com>
Date: Tue, 18 Feb 2020 13:19:44 -0800
Update ThermistorDemo.ino
Diffstat:
1 file changed, 48 insertions(+), 25 deletions(-)
diff --git a/ThermistorDemo/ThermistorDemo.ino b/ThermistorDemo/ThermistorDemo.ino
@@ -1,27 +1,50 @@
-int ThermistorPin = 0;
-int Vo;
-float R1 = 10000;
-float logR2, R2, T, Tc, Tf;
-float c1 = 1.009249522e-03, c2 = 2.378405444e-04, c3 = 2.019202697e-07;
-
-void setup() {
-Serial.begin(9600);
+/* Sensor test sketch
+ for more information see http://www.ladyada.net/make/logshield/lighttemp.html
+ */
+
+#define aref_voltage 3.3 // we tie 3.3V to ARef and measure it with a multimeter!
+
+
+
+
+//TMP36 Pin Variables
+int tempPin = 1; //the analog pin the TMP36's Vout (sense) pin is connected to
+ //the resolution is 10 mV / degree centigrade with a
+ //500 mV offset to allow for negative temperatures
+int tempReading; // the analog reading from the sensor
+
+void setup(void) {
+ // We'll send debugging information via the Serial monitor
+ Serial.begin(9600);
+
+ // If you want to set the aref to something other than 5v
+ analogReference(EXTERNAL);
}
-
-void loop() {
-
- Vo = analogRead(ThermistorPin);
- R2 = R1 * (1023.0 / (float)Vo - 1.0);
- logR2 = log(R2);
- T = (1.0 / (c1 + c2*logR2 + c3*logR2*logR2*logR2));
- Tc = T - 273.15;
- Tf = (Tc * 9.0)/ 5.0 + 32.0;
-
- Serial.print("Temperature: ");
- Serial.print(Tf);
- Serial.print(" F; ");
- Serial.print(Tc);
- Serial.println(" C");
-
- delay(500);
+
+
+void loop(void) {
+
+ tempReading = analogRead(tempPin);
+
+ Serial.print("Temp reading = ");
+ Serial.print(tempReading); // the raw analog reading
+
+ // converting that reading to voltage, which is based off the reference voltage
+ float voltage = tempReading * aref_voltage;
+ voltage /= 1024.0;
+
+ // print out the voltage
+ Serial.print(" - ");
+ Serial.print(voltage); Serial.println(" volts");
+
+ // now print out the temperature
+ float temperatureC = (voltage - 0.5) * 100 ; //converting from 10 mv per degree wit 500 mV offset
+ //to degrees ((volatge - 500mV) times 100)
+ Serial.print(temperatureC); Serial.println(" degrees C");
+
+ // now convert to Fahrenheight
+ float temperatureF = (temperatureC * 9.0 / 5.0) + 32.0;
+ Serial.print(temperatureF); Serial.println(" degrees F");
+
+ delay(1000);
}
\ No newline at end of file
