No trigger available for Thermistor?!

Community Help With My Project
1

Hi Everyone,
Ive set up an aquarium IoT project. I have a pretty sophisticated inline heater in place that has lots of built in safeties. However, since I have a relay controlling its outlet, I wanted to add just a “watch dog” high limit safety in the event that the water temp reached an unsafe level, indicating a malfunction with the heater or its safeties.

I have a thermistor in place, giving me good data. But when I go to set up a trigger, it does not appear in my “IF” drop down. Is this a bug? Am I doing something wrong?

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2

Have you added the correct data type for the widget?
You may try deleting the widget and let it re-add it automatically.

3

I integrated the sketch Cayenne produced when adding the widget with my my main code for the rest of the actuators which included the <Cayenne.Temperature.h>. It is just a generic 10k ohm thermistor, so in theory you dont need any special library as its just a true analog value being interpenetrated correct?

I have tried deleting and adding the same device as a generic analog input and also have had success with monitoring through the widget, but it still does not appear in my “IF” drop down. I am unaware it would re-add anything automatically though… could you explain that a little more please?

Here is my code if it helps
Thanks!

#define CAYENNE_PRINT Serial  // Comment this out to disable prints and save space
#include <CayenneMQTTSerial.h>
#include <CayenneTemperature.h>

// Cayenne authentication info. This should be obtained from the Cayenne Dashboard.
char username[] = "";
char password[] = "";
char clientID[] = "";

#define VIRTUAL_CHANNEL_1 V1
#define DIGITAL_PIN_12 12 //LIGHT

#define VIRTUAL_CHANNEL_2 V2
#define ACTUATOR_PIN_11 11 //AIR PUMP

#define VIRTUAL_CHANNEL_3 V3
#define ACTUATOR_PIN_10 10 //WAVE MAKERS

#define VIRTUAL_CHANNEL_4 V4
#define ACTUATOR_PIN_9 9 //HEATER

#define VIRTUAL_CHANNEL_5 V5
#define ACTUATOR_PIN_8 8 // FILTER & PUMP

#define VIRTUAL_CHANNEL_6 V6
#define SENSOR_PIN A5
const float resistance = 9780; 
Thermistor thermistor(SENSOR_PIN, resistance);

void setup()
{
  //Serial.begin(9600);
  pinMode(DIGITAL_PIN_12, OUTPUT);
  pinMode(ACTUATOR_PIN_11, OUTPUT);
  pinMode(ACTUATOR_PIN_10, OUTPUT);
  pinMode(ACTUATOR_PIN_9, OUTPUT);
  pinMode(ACTUATOR_PIN_8, OUTPUT);
  Cayenne.begin(username, password, clientID);
}

void loop()
{
  Cayenne.loop();
}

// This function is called when data is sent from Cayenne.
CAYENNE_IN(VIRTUAL_CHANNEL_1)
{
  // Write value to turn the relay switch on or off. This code assumes you wire your relay as normally open.
  if (getValue.asInt() == 0) {
    digitalWrite(DIGITAL_PIN_12, HIGH);
  }
  else {
    digitalWrite(DIGITAL_PIN_12, LOW);
  }
}
  CAYENNE_IN(VIRTUAL_CHANNEL_2)
{
  // Write value to turn the relay switch on or off. This code assumes you wire your relay as normally open.
  if (getValue.asInt() == 0) {
    digitalWrite(ACTUATOR_PIN_11, HIGH);
  }
  else {
    digitalWrite(ACTUATOR_PIN_11, LOW);
  }
}
CAYENNE_IN(VIRTUAL_CHANNEL_3)
{
  // Write value to turn the relay switch on or off. This code assumes you wire your relay as normally open.
  if (getValue.asInt() == 0) {
    digitalWrite(ACTUATOR_PIN_10, HIGH);
  }
  else {
    digitalWrite(ACTUATOR_PIN_10, LOW);
  }
}
CAYENNE_IN(VIRTUAL_CHANNEL_4)
{
  // Write value to turn the relay switch on or off. This code assumes you wire your relay as normally open.
  if (getValue.asInt() == 0) {
    digitalWrite(ACTUATOR_PIN_9, LOW); // LOGIC IS INVERTED FOR NC WIRING
  }
  else {
    digitalWrite(ACTUATOR_PIN_9, HIGH);
  }
}
CAYENNE_IN(VIRTUAL_CHANNEL_5)
{
  // Write value to turn the relay switch on or off. This code assumes you wire your relay as normally open.
  if (getValue.asInt() == 0) {
    digitalWrite(ACTUATOR_PIN_8, LOW); // LOGIC IS INVERTED FOR NC WIRING
  }
  else {
    digitalWrite(ACTUATOR_PIN_8, HIGH);
  }
}
  CAYENNE_OUT(VIRTUAL_CHANNEL_6)
{
  // This command writes the temperature in Celsius to the Virtual Channel.
  //Cayenne.celsiusWrite(VIRTUAL_CHANNEL, thermistor.getCelsius());
  // To send the temperature in Fahrenheit or Kelvin use the corresponding code below.
  Cayenne.fahrenheitWrite(VIRTUAL_CHANNEL_6, thermistor.getFahrenheit());
  //Cayenne.kelvinWrite(VIRTUAL_CHANNEL, thermistor.getKelvin());
}
4

can you try changing V1 to 1 in:

and also for other virtual channels.

Delete the temperature widget from the dashboard. Once you upload the code successfully, Cayenne.fahrenheitWrite(VIRTUAL_CHANNEL_6, thermistor.getFahrenheit()); will create a green temporary widget on your dashboard with channel 6. Click on the + to make it permanent.