i have searched all topic related to DHT11 cayenne community.but not able to find any working code for DHT11…
after ong search i find DHT_Cay.txt.but after compilation i got error of
Arduino: 1.6.5 (Windows 8.1), Board: “Arduino/Genuino Uno”
In file included from C:\Program Files (x86)\Arduino\libraries\DHT_sensor_library\DHT_U.cpp:22:0:
C:\Program Files (x86)\Arduino\libraries\DHT_sensor_library\DHT_U.h:25:29: fatal error: Adafruit_Sensor.h: No such file or directory
#include <Adafruit_Sensor.h>
^
compilation terminated.
Error compiling.
MY CODE IS AS FOLLOWS.
// Example testing sketch for various DHT humidity/temperature sensors
#include "DHT.h"
#define CAYENNE_DEBUG // Cayenne Code Uncomment to show debug messages
#define DHTPIN 2 // what digital pin we're connected to
#define CAYENNE_PRINT Serial // Cayenne Code Comment this out to disable prints and save space
#include <CayenneSerial.h> // Cayenne Code Change this to use a different communication device. See Communications examples.
// Cayenne authentication token. This should be obtained from the Cayenne Dashboard.
char token[] = "itwjt5dc6q";
// Uncomment whatever type you're using!
#define DHTTYPE DHT11 // DHT 11
// Connect pin 1 (on the left) of the sensor to +5V
// NOTE: If using a board with 3.3V logic like an Arduino Due connect pin 1
// to 3.3V instead of 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
// Initialize DHT sensor
// Note that older versions of this library took an optional third parameter to
// tweak the timings for faster processors. This parameter is no longer needed
// as the current DHT reading algorithm adjusts itself to work on faster procs.
DHT dht(DHTPIN, DHTTYPE);
void setup() {
Serial.println("DHTxx test!");
Cayenne.begin(token);
dht.begin();
}
void loop() {
Cayenne.run();
// 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();
// Read temperature as Celsius (the default)
float t = dht.readTemperature();
// Read temperature as Fahrenheit (isFahrenheit = true)
float f = dht.readTemperature(true);
// 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 in Fahrenheit (the default)
float hif = dht.computeHeatIndex(f, h);
// Compute heat index in Celsius (isFahreheit = false)
float hic = dht.computeHeatIndex(t, h, false);
Serial.print("Humidity: ");
Serial.print(h);
Serial.print(" %\t");
Serial.print("Temperature: ");
Serial.print(t);
Serial.print(" *C ");
Serial.print(f);
Serial.print(" *F\t");
Serial.print("Heat index: ");
Serial.print(hic);
Serial.print(" *C ");
Serial.print(hif);
Serial.println(" *F");
}
// These functions are called when the Cayenne widget requests data for the Virtual Pin.
CAYENNE_OUT(V0)
{
Cayenne.virtualWrite(V0, dht.readTemperature(true));
}
CAYENNE_OUT(V1)
{
Cayenne.virtualWrite(V1, dht.readHumidity());
}
CAYENNE_OUT(V2)
{
Cayenne.virtualWrite(V2, dht.readTemperature());
}
CAYENNE_OUT(V3)
{
Cayenne.virtualWrite(V3, dht.readHumidity());
}
CAYENNE_OUT(V4)
{
Cayenne.virtualWrite(V4, dht.readTemperature(true));
}
I ALSO DOWNLOAD ADAFRUIT LIBRARY FOR ALL THE SENSOR INCLUDING dht11. but again error persists…
help me…
i am using USB serial communication for connection arduino to cayenne…
