For Real Alt and Blue Temp variables I get “(int32) = 536871936” when I click “get”.
I am using DHT11 Temperature and Humidy Sensor and BMP180 Barometer.
The Serial Output shows the correct values.
Help?
// This #include statement was automatically added by the Particle IDE.
#include "Adafruit_DHT.h"
// This #include statement was automatically added by the Particle IDE.
#if !defined(PARTICLE)
#include <Wire.h>
#endif
#include <Adafruit_BMP085.h>
#define DHTPIN 2 // what pin we're connected to
#define DHTTYPE DHT11 // DHT 11
// Connect VCC of the BMP085 sensor to 3.3V (NOT 5.0V!)
// Connect GND to Ground
// Connect SCL to i2c clock - on '168/'328 Arduino Uno/Duemilanove/etc thats Analog 5, Particle on D1
// Connect SDA to i2c data - on '168/'328 Arduino Uno/Duemilanove/etc thats Analog 4, Particle on D0
// EOC is not used, it signifies an end of conversion
// XCLR is a reset pin, also not used here
Adafruit_BMP085 bmp;
DHT dht(DHTPIN, DHTTYPE);
void callback(char* topic, byte* payload, unsigned int length);
int pres;
int alt;
double temp;
double humu;
int btemp;
void setup() {
Serial.begin(9600);
if (!bmp.begin()) {
Serial.println("Could not find a valid BMP085 sensor, check wiring!");
while (1) {}
}
dht.begin();
Particle.variable("Pressure", pres);
Particle.variable("Real Alt", alt);
Particle.variable("BarTemp", temp);
Particle.variable("Humidity", humu);
Particle.variable("Blue Temp", btemp);
}
void loop() {
Serial.print("Temperature = ");
Serial.print(bmp.readTemperature());
Serial.println(" *C");
Serial.print("Pressure = ");
Serial.print(bmp.readPressure());
Serial.println(" Pa");
// Calculate altitude assuming 'standard' barometric
// pressure of 1013.25 millibar = 101325 Pascal
Serial.print("Altitude = ");
Serial.print(bmp.readAltitude());
Serial.println(" meters");
Serial.print("Pressure at sealevel (calculated) = ");
Serial.print(bmp.readSealevelPressure());
Serial.println(" Pa");
// you can get a more precise measurement of altitude
// if you know the current sea level pressure which will
// vary with weather and such. If it is 1015 millibars
// that is equal to 101500 Pascals.
Serial.print("Real altitude = ");
Serial.print(bmp.readAltitude(101500));
Serial.println(" meters");
Serial.println();
float h = dht.getHumidity();
// Read temperature as Celsius
float t = dht.getTempCelcius();
// Read temperature as Farenheit
float f = dht.getTempFarenheit();
float a = bmp.readAltitude(101500);
// Check if any reads failed and exit early (to try again).
if (isnan(h) || isnan(t) || isnan(f)) {
Serial.println("Failed to read from DHT sensor!");
return;
}
// Compute heat index
// Must send in temp in Fahrenheit!
float hi = dht.getHeatIndex();
float dp = dht.getDewPoint();
float k = dht.getTempKelvin();
Serial.print("Humid: ");
Serial.print(h);
Serial.print("% - ");
Serial.print("Temp: ");
Serial.print(t);
Serial.print("*C ");
Serial.print(f);
Serial.print("*F ");
Serial.print(k);
Serial.print("*K - ");
Serial.print("DewP: ");
Serial.print(dp);
Serial.print("*C - ");
Serial.print("HeatI: ");
Serial.print(hi);
Serial.println("*C");
Serial.println(Time.timeStr());
pres = bmp.readPressure();
alt = a;
temp = bmp.readTemperature();
humu = h;
btemp = dht.getTempCelcius();
delay(300);
}
don’t feel bad about it. we’ve all been there 