Desktop shows wrong DHT22 temperature vs. App

Community Help With My Project Helped
1

Through my PC web browser I have desktop shows wrong DHT22 temperature but on mobile App it show correct temp.
On desktop 16.5 F. on mobile App it is correctly at 61.7 F.

I have been using Cayenne for years with Pi’s and just recently wanted to try it with Arduinos.

Using Uno, DHT22 and W5100. Is this a bug somewhere since it is only on the web page and not the App?

2

we no longer support mobile app issues.
For web issue are you sending the temperature data as celsius or Fahrenheit. Can you share the code?

3

Sure I can share my code if it helps. Do I simply copy & paste (removing my MTQQ credentials) in a reply?

BTW - Mobile is fine, it’s the desktop that has the issue.
Follow up - On the desktop as soon as I log in the temperature is fine MOMENTARLY then shows wrong.

4

yes.

But we no longer support any mobile issue.

5

Understood, this is a desktop issue.

6

#define CAYENNE_DEBUG
#define CAYENNE_PRINT Serial // Comment this out to disable prints and save space
#include <CayenneMQTTEthernet.h>
#include <DHT.h>

// Cayenne authentication info. This should be obtained from the Cayenne Dashboard.
char username = “xxx”;
char password = “xxx”;
char clientID = “xxx”;

#define DHTPIN 2 // Digital pin connected to the DHT sensor

// Uncomment whatever type you’re using!
//#define DHTTYPE DHT11 // DHT 11
#define DHTTYPE DHT22 // DHT 22 (AM2302), AM2321
//#define DHTTYPE DHT21 // DHT 21 (AM2301)

#define TEMPERATURE_VIRTUAL_CHANNEL 1
#define HUMIDITY_VIRTUAL_CHANNEL 2

DHT dht(DHTPIN, DHTTYPE); // Initialize DHT sensor.

void setup() {
Serial.begin(9600);
Cayenne.begin(username, password, clientID);
dht.begin();
}

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

// This function is called at intervals to send temperature sensor data to Cayenne in Celsius.
CAYENNE_OUT(TEMPERATURE_VIRTUAL_CHANNEL)
{
Cayenne.virtualWrite(TEMPERATURE_VIRTUAL_CHANNEL, dht.readTemperature(), “temp”, “c”);
}

// This function is called at intervals to send humidity sensor data to Cayenne.
CAYENNE_OUT(HUMIDITY_VIRTUAL_CHANNEL)
{
Cayenne.virtualWrite(HUMIDITY_VIRTUAL_CHANNEL, dht.readHumidity(), “rel_hum”, “p”);
}

7

so you want it to show as Fahrenheit or celsius on the dashboard?

8

In the dashboard settings I set it to Fahrenheit.

Ahh, I think I know what you are going to say. If I’m right you are going to tell me to put the c to f conversion in the sketch?

9

yes, that was what it is.

10

Thank you for that.