Great, thanks.
That worked for the most part. The only problem it that the altitude and pressure numbers are not turning up. Here is my sketch:
// Example testing sketch for various DHT humidity/temperature sensors
// Written by ladyada, public domain
#include "DHT.h"
#include <Wire.h>
#include <Adafruit_Sensor.h>
#include <Adafruit_BMP085_U.h>
#define DHTPIN 2 // what pin we're connected to
// Uncomment whatever type you're using!
#define DHTTYPE DHT11 // DHT 11
//#define DHTTYPE DHT22 // DHT 22 (AM2302)
//#define DHTTYPE DHT21 // DHT 21 (AM2301)
// Connect pin 1 (on the left) of the sensor to +5V
// Connect pin 2 of the sensor to whatever your DHTPIN is
// Connect pin 4 (on the right) of the sensor to GROUND
// Connect a 10K resistor from pin 2 (data) to pin 1 (power) of the sensor
DHT dht(DHTPIN, DHTTYPE);
void setup() {
Serial.begin(9600);
Serial.println("DHTxx test!");
Serial.println("Pressure Sensor Test"); Serial.println("");
dht.begin();
}
void loop() {
// Reading temperature or humidity takes about 250 milliseconds!
// Sensor readings may also be up to 2 seconds 'old' (its a very slow sensor)
float h = dht.readHumidity();
float t = dht.readTemperature();
// check if returns are valid, if they are NaN (not a number) then something went wrong!
if (isnan(t) || isnan(h)) {
Serial.println("Failed to read from DHT");
} else {
Serial.print("Humidity: ");
Serial.print(h);
Serial.print(" %\t");
Serial.print("Temperature: ");
Serial.print(t);
Serial.println(" C");
/ Get a new sensor event */
sensors_event_t event;
/* Display the results (barometric pressure is measure in hPa) /
if (event.pressure)
{
/ Display atmospheric pressue in hPa */
Serial.print("Pressure: ");
Serial.print(event.pressure);
Serial.println(" hPa");
/* Calculating altitude with reasonable accuracy requires pressure *
- sea level pressure for your position at the moment the data is *
- converted, as well as the ambient temperature in degress *
- celcius. If you don't have these values, a 'generic' value of *
- 1013.25 hPa can be used (defined as SENSORS_PRESSURE_SEALEVELHPA *
- in sensors.h), but this isn't ideal and will give variable *
- results from one day to the next. *
-
- You can usually find the current SLP value by looking at weather *
- websites or from environmental information centers near any major *
- airport. *
-
- For example, for Paris, France you can check the current mean *
- pressure and sea level at: http://bit.ly/16Au8ol */
/* Then convert the atmospheric pressure, SLP and temp to altitude /
/ Update this next line with the current SLP for better results */
float seaLevelPressure = SENSORS_PRESSURE_SEALEVELHPA;
Serial.print("Altitude: ");
Serial.println(" m");
Serial.println("");
}
else
{
Serial.println("Sensor error");
}
delay(1000);
}
}
Here is what it is showing: