Cayenne + am2301 (temp. sensor) + sd card

[shramik_salgaonkar]

@shramik_salgaonkar

//#define CAYENNE_DEBUG
#define CAYENNE_PRINT Serial
#include <CayenneMQTTESP8266.h>
#include “DHT.h”

#include <SD.h>
#define CS_PIN  D8;
File myFile;

#define DHTPIN 12 // modify to the pin we connected
#define DHTTYPE AM2301 // AM2301

DHT dht(DHTPIN, DHTTYPE);

// WiFi network info.
char ssid = “*******************”;
char wifiPassword = “**************”;

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

unsigned long lastMillis = 0;

void setup() {
Serial.begin(9600);
Cayenne.begin(username, password, clientID, ssid, wifiPassword);
  Serial.print("Initializing SD card...");

  if (!SD.begin(CS_PIN)) {
    Serial.println("initialization failed. Things to check:");
    Serial.println("1. is a card inserted?");
    Serial.println("2. is your wiring correct?");
    Serial.println("3. did you change the chipSelect pin to match your shield or module?");
    Serial.println("Note: press reset or reopen this serial monitor after fixing your issue!");
    while (1);
  }

  Serial.println("initialization done.");

dht.begin();
}

void loop() {
Cayenne.loop();

//Publish data every 10 seconds (10000 milliseconds). Change this value to publish at a different interval.
if (millis() - lastMillis > 10000) {
lastMillis = millis();
//Write data to Cayenne here. This example just sends the current uptime in milliseconds.
Cayenne.virtualWrite(0, lastMillis);

float humidity = dht.readHumidity();
float temperature = dht.readTemperature();
Cayenne.celsiusWrite(1, temperature);
Cayenne.virtualWrite(2, humidity, "rel_hum", "p");

   myFile = SD.open("test.txt", FILE_WRITE);
 // if the file opened okay, write to it:
  if (myFile) {
    Serial.print("Writing to test.txt...");
    myFile.print(temperature);
    myFile.print(" | ");
    myFile.println(humidity);

// close the file:
myFile.close();
Serial.println("done.");
  } else {
    // if the file didn't open, print an error:
    Serial.println("error opening test.txt");
  }
    }
    }

//Default function for processing actuator commands from the Cayenne Dashboard.
//You can also use functions for specific channels, e.g CAYENNE_IN(1) for channel 1 commands.
CAYENNE_IN_DEFAULT()
{
CAYENNE_LOG(“CAYENNE_IN_DEFAULT(%u) - %s, %s”, request.channel, getValue.getId(), getValue.asString());
//Process message here. If there is an error set an error message using getValue.setError(), e.g getValue.setError(“Error message”);
}

i dont see datafile anywhere in this code.