Added some function to thermistor

src/PID/PidController.cpp

@@ -1,6 +1,9 @@
 #include "PidController.h"
 #include "globals.h"
 #define MOSTFET_PIN 17
+#include "voltageReference/AnalogRef.h"
+
+extern AnalogRef analogRef;
 
 PidController::PidController(PidControllerData *data)
 {
@@ -13,7 +16,7 @@ PidController::PidController(PidControllerData *data)
     controller.begin(&(this->data->currentTemp), &(this->data->setPoint), &(this->data->targetTemp), kp, ki, kd);
     controller.reverse();
     controller.setOutputLimits(0, 255);
-    controller.setSampleTime(20);
+    //controller.setSampleTime(20);
     controller.setWindUpLimits(-100, 185);
 }
 
@@ -38,6 +41,24 @@ void PidController::loop()
     data->targetTemp = chosenReflowProfile.getTargetTemp();
     data->currentTemp = thermistor1.getTemperature();
     // debug();
+
+    float sysVoltage = analogRef.calculateSystemVoltage();
+
+    // // Serial.print("Sys Voltage: ");
+    // // Serial.println(sysVoltage);
+
+
+    // if (sysVoltage < 10.5)
+    // {
+
+    //     controller.setWindUpLimits(-20, 50);
+ 
+
+    // }else{
+    // controller.setWindUpLimits(-100, 185);
+        
+    // }
+
     compute();
     analogWrite(MOSTFET_PIN, data->setPoint);
 }
@@ -50,6 +71,8 @@ void PidController::stop()
     analogWrite(MOSTFET_PIN, 255); // VERY IMPORTANT, DONT CHANGE!
     controller.reset();
     controller.stop();
+
+
 }
 
 void PidController::start()

src/displays/oled.cpp

@@ -67,9 +67,12 @@ void OledDisplay::handleButtonStateChange(Pair<ButtonKind, StateChangeEvent<Butt
                 curMenu->goNextItem();
             }
         }
-    } else if (state == DONE) {
+    }
+    else if (state == DONE)
+    {
         // GO back to iniital state
-        if (change.second.to == ButtonState::PRESSED) {
+        if (change.second.to == ButtonState::PRESSED)
+        {
             reflowProcessState.set(USER_INPUT);
         }
     }
@@ -97,7 +100,7 @@ void OledDisplay::handleDrawThermistorMenu(OledMenuItem menuItem)
         display.setTextSize(1, 2);
         for (int i = 0; i < 6; i++)
         {
-            float thermR = thermistors[i].getResistance()/1000;
+            float thermR = thermistors[i].getResistance() / 1000;
             display.setCursor(i < 3 ? 0 : (SCREEN_WIDTH / 2 + 20), 20 * (i % 3));
             display.println(String(i + 1) + ":" + String(thermR));
         }
@@ -186,9 +189,12 @@ void OledDisplay::loop()
     else if (state >= ReflowProcessState::PREHEAT && state < ReflowProcessState::DONE)
     {
         handleReflowState();
-    } else if (state == ReflowProcessState::DONE) {
+    }
+    else if (state == ReflowProcessState::DONE)
+    {
         // Traverse back to root menu
-        while (curMenu->parent != NULL) {
+        while (curMenu->parent != NULL)
+        {
             curMenu = curMenu->parent;
         }
         display.clearDisplay();
@@ -196,9 +202,9 @@ void OledDisplay::loop()
         display.setTextSize(2);
         drawPositionedText("DONE :)", DisplayTextAlignment::CENTER, DisplayTextAlignment::START);
         uint8_t curTemp = thermistor1.getTemperature();
-        display.setTextSize(1,2);
+        display.setTextSize(1, 2);
         drawPositionedText("Temperature", DisplayTextAlignment::START, DisplayTextAlignment::CENTER);
-        drawPositionedText((String(curTemp)+" C").c_str(), DisplayTextAlignment::END, DisplayTextAlignment::CENTER);
+        drawPositionedText((String(curTemp) + " C").c_str(), DisplayTextAlignment::END, DisplayTextAlignment::CENTER);
 
         display.display();
 
@@ -278,9 +284,12 @@ void OledDisplay::handleUserInputState()
     else
     {
         // Default menu handling. Just display the title and the indicators to go back and forth
-        if (strlen(menuItem.title) > 8) {
+        if (strlen(menuItem.title) > 8)
+        {
             display.setTextSize(1, 2);
-        } else {
+        }
+        else
+        {
             display.setTextSize(2);
         }
         centerText(menuItem.title);
@@ -297,15 +306,10 @@ void OledDisplay::handleReflowState()
     ReflowProcessState state = reflowProcessState.get();
     // Title topleft
     drawPositionedText(STATE_STR(state), DisplayTextAlignment::CENTER, DisplayTextAlignment::START);
-    
+
     display.setTextSize(1, 2);
-    // SysV topright
-    // #ifdef DEBUG
-    
-        drawPositionedText((String(analogRef.calculateInputVoltage())+"V").c_str(), DisplayTextAlignment::END, DisplayTextAlignment::START);
-    // #endif
-    
-    
+
+
     // Remaining time center left + bottom left
     uint32_t elapsedStep = chosenReflowProfile.getCurrentStepRelativeTime();
     drawPositionedText("Remaining", DisplayTextAlignment::START, DisplayTextAlignment::CENTER);
@@ -317,8 +321,14 @@ void OledDisplay::handleReflowState()
     drawPositionedText(("Curr.: " + String(curTemp)).c_str(), DisplayTextAlignment::END, DisplayTextAlignment::CENTER);
     drawPositionedText(("Target: " + String(targetTemp)).c_str(), DisplayTextAlignment::END, DisplayTextAlignment::END);
 
-    
     // display.println("In Voltage:"+String(systemVoltage));
 
+    // SysV topright
+    // #ifdef DEBUG
+    display.setCursor(25, 15);
+    display.setTextSize(1, 1);
+    display.print(analogRef.calculateInputVoltage());
+    // #endif
+
     display.display();
 }

src/globals.cpp

@@ -6,8 +6,8 @@
 WrappedState<ReflowProcessState> reflowProcessState = WrappedState<ReflowProcessState>(INITIALIZING);
 AnalogRef analogRef(5.0);
 
-// Calibration data for 100K thermistors ->https://fab.cba.mit.edu/classes/863.18/CBA/people/erik/reference/11_NTC-3950-100K.pdf ->Glass thermistor NTC 3950 100K
-TempCalibration calibration_100K_3950 = {25, 100000, 86, 10324, 169, 1148};
+// Calibration data for 100K thermistors ->https://datasheet.lcsc.com/lcsc/1810161311_Nanjing-Shiheng-Elec-MF58-104F3950_C123399.pdf ->Glass thermistor NTC 3950 100K
+TempCalibration calibration_100K_3950 = {25, 100000, 107, 4957, 167, 1000};
 // Initalize the 3950 100K thermistors with ACTUAL reference resistor measurnment(Measured between Left pin and GND when the board is powered off) using the default calibration data for 100K thermistor
 
 // You can also make a custom calibration data for your thermistor and use that instead of the default one pass it as shown below --> keep the naming of the thermistor the same as the one you are replacing
@@ -23,7 +23,7 @@ TempCalibration calibration_100K_3950 = {25, 100000, 86, 10324, 169, 1148};
 // To measure the resistence turn off the controller completley and measure between GND and the left pin of the connector with the thermistor unplugged
 
 // 2.5k reference = Best accuracy around 138C
-Thermistor thermistor1(THERMISTOR1_PIN, 2500, ThermistorZ_Placement::BOTTOM, ThermistorXY_Placement::RIGHT);
+Thermistor thermistor1(THERMISTOR1_PIN, 2500, ThermistorZ_Placement::TOP, ThermistorXY_Placement::MIDDLE);
 Thermistor thermistor2(THERMISTOR2_PIN, 2500, ThermistorZ_Placement::TOP, ThermistorXY_Placement::MIDDLE);
 Thermistor thermistor3(THERMISTOR3_PIN, 2500, ThermistorZ_Placement::TOP, ThermistorXY_Placement::MIDDLE);
 // 1k reference = Best accuracy around 173c

src/main.cpp

@@ -110,9 +110,9 @@ void loop()
   {
 
     pidController.loop();
-    #ifdef DEBUG
+   // #ifdef DEBUG
       pidController.debug();
-    #endif
+ //   #endif
     tftDisplay.drawRealTemp(pidController.getInput(), chosenReflowProfile.getPercentage());
     ReflowStep step = chosenReflowProfile.reflowStep();
     // Here we draw the actual temp vs time to the display

src/thermistors/TemperatureController.cpp

@@ -40,6 +40,14 @@ void TemperatureController::checkPluggedInThermistors()
     debugLine(activeThermistorCount);
 }
 
+float TemperatureController::getThermistorTempFast(uint8_t thermistorIndex)
+{
+    
+    return thermistors[thermistorIndex].getTemperatureFast();
+}
+
+
+
 /**
  * Calculates and returns the average temperature of the solder plate based on the active thermistors.
  * The average temperature is calculated by summing the temperature of each active thermistor and dividing by the number of active thermistors.

src/thermistors/TemperatureController.h

@@ -14,10 +14,12 @@ public:
 
     float getPlateTemperature();
     void checkPluggedInThermistors();
+    float static getThermistorTempFast(uint8_t thermistorIndex);
     
 private:
     bool thermistorIsActive[6];
     uint8_t activeThermistorCount =0 ;
 
+
 };
 #endif // TEMPERATURE_CONTROLLER_H

src/thermistors/Thermistor.cpp

@@ -27,6 +27,8 @@ float Thermistor::getTemperature()
 
     // The scaling factor should only be applied when the plate is being heated up -> 60C seems like a good threshold unless you live in the sahara desert with no AC
     // Its non-linear so it will be more accurate so we will probably need to impliment a refrence table for the scaling factor this is just a rough estimate it will be based on a sensor calibrated on the top middle of the plate
+    
+    //TODO: Impliment a method to calculate the scaling factor based on the placement of the thermistor by measurnment sof refrence center thermistor to other positions
     if (temp > 60)
     {
         temp = temp * scalingFactor;
@@ -67,7 +69,7 @@ void Thermistor::calculateCoefficents(TempCalibration calibration)
 
 bool Thermistor::isPluggedIn()
 {
-   //check if the resistnece is INF is so then the thermistor is not plugged in
+    // check if the resistnece is INF is so then the thermistor is not plugged in
     if (getResistance() == INFINITY)
     {
         return false;
@@ -76,7 +78,6 @@ bool Thermistor::isPluggedIn()
     {
         return true;
     }
-    
 }
 
 /**
@@ -120,22 +121,47 @@ void Thermistor::calculateScalingFactor()
     }
 }
 
+float Thermistor::getTemperatureFast()
+{
+
+    // Get only one reading
+    getResistance();
+
+    float temp = (int)1 / (coefficents.a + coefficents.b * log(sensorResistance) + coefficents.c * (pow(log(sensorResistance), 3))) - K;
+
+    // The scaling factor should only be applied when the plate is being heated up -> 60C seems like a good threshold unless you live in the sahara desert with no AC
+
+    // Its non-linear so it will be more accurate so we will probably need to impliment a refrence table for the scaling factor this is just a rough estimate it will be based on a sensor calibrated on the top middle of the plate
+
+    if (temp > 60)
+    {
+        temp = temp * scalingFactor;
+    }
+
+    return temp;
+}
+
 float Thermistor::getResistance()
 {
 
     float systemVoltage = analogRef.calculateSystemVoltage();
 
-    int raw = analogRead(thermistorPin);
+    // int raw = analogRead(thermistorPin);
 
-    // Get resistance value
-    float buffer = raw * systemVoltage;
-    float vOut = (buffer) / 1023;
+    // // Get resistance value
+    // float buffer = raw * systemVoltage;
+    // float vOut = (buffer) / 1023;
 
-    // Calculate the resistance of the thermistor with the system voltage accounted for
-    buffer = (systemVoltage / vOut) - 1;
+    // // Calculate the resistance of the thermistor with the system voltage accounted for
+    // buffer = (systemVoltage / vOut) - 1;
 
-    // return the resistence
-    sensorResistance = setRes * buffer;
+    // // return the resistence
+    // sensorResistance = setRes * buffer;
+
+    int sensorValue = analogRead(thermistorPin);                      // Read the analog value (0-1023)
+    float voltage = sensorValue * (systemVoltage / 1023.0);           // Convert to voltage
+    float R_unknown = (setRes * (systemVoltage - voltage)) / voltage; // Calculate the unknown resistor's value
+    sensorResistance = R_unknown;
 
     return sensorResistance;
 }

src/thermistors/Thermistor.h

@@ -32,7 +32,6 @@ extern TempCalibration calibration_100K_3950;
 
 extern AnalogRef analogRef;
 
-
 enum ThermistorZ_Placement
 {
     TOP,
@@ -52,13 +51,13 @@ public:
     // Constructor
     Thermistor();
 
-    Thermistor(uint8_t pin, uint16_t resistance, TempCalibration calibration,ThermistorZ_Placement zPlacement,ThermistorXY_Placement  xyPlacment) : thermistorPin(pin), setRes(resistance), calibration(calibration),zPlacement(zPlacement),xyPlacment(xyPlacment)
+    Thermistor(uint8_t pin, uint16_t resistance, TempCalibration calibration, ThermistorZ_Placement zPlacement, ThermistorXY_Placement xyPlacment) : thermistorPin(pin), setRes(resistance), calibration(calibration), zPlacement(zPlacement), xyPlacment(xyPlacment)
     {
         calculateCoefficents(calibration);
         calculateScalingFactor();
     }
 
-    Thermistor(uint8_t pin, uint16_t resistance,ThermistorZ_Placement zPlacement,ThermistorXY_Placement  xyPlacment) : thermistorPin(pin), setRes(resistance), calibration(calibration_100K_3950),zPlacement(zPlacement),xyPlacment(xyPlacment)
+    Thermistor(uint8_t pin, uint16_t resistance, ThermistorZ_Placement zPlacement, ThermistorXY_Placement xyPlacment) : thermistorPin(pin), setRes(resistance), calibration(calibration_100K_3950), zPlacement(zPlacement), xyPlacment(xyPlacment)
     {
         calculateCoefficents(calibration);
         calculateScalingFactor();
@@ -74,6 +73,7 @@ public:
     float getScalingFactor() { return scalingFactor; };
 
     bool isPluggedIn();
+    float getTemperatureFast();
 
 private:
     ThermistorZ_Placement zPlacement;
@@ -81,14 +81,12 @@ private:
     const double K = 273.15;
     float sensorResistance;
     uint8_t thermistorPin;
-    uint16_t setRes;
+    float setRes;
     Coefficents coefficents;
     float referenceResistance;
     TempCalibration calibration;
-    float scalingFactor ;
+    float scalingFactor;
     void calculateScalingFactor();
-
-
 };
 
 #endif // THERMISTOR_H

src/voltageReference/AnalogRef.h

@@ -64,7 +64,7 @@ public:
 
     float value;
 
-    uint8_t sampleCount = 20;
+    uint8_t sampleCount = 10;
     value = 0;
 
     for (size_t i = 0; i < sampleCount; ++i)