Question

我刚开始使用Xively并尝试了基础教程（https://xively.com/dev/tutorials/arduino_wi-fi/）我刚刚改变了我的网络访问WPA2似乎工作，但后来我在串行监视器中得到以下响应：

Starting single datastream upload to Xively...

Attempting to connect to SSID: Tinker Lab
Connected to wifi
SSID: Tinker Lab
IP Address: 192.168.1.103
signal strength (RSSI):-45 dBm 

HTTP Error
Read sensor value 560.00
Uploading it to Xively
xivelyclient.put returned -1

我的代码如下：

/*
##Xively WiFi Sensor Tutorial##
This sketch is designed to take sensors (from photocell) and upload the values to Xively
at consistant intervals. At the same time it gets a setable value from Xively to adjust the brigthness
of an LED. This sketch is reusable and can be adapted for use with many different sensors.
Derived from Xively Ardino Sensor Client by Sam Mulube.

By Calum Barnes 3-4-2013
BSD 3-Clause License - [http://opensource.org/licenses/BSD-3-Clause]
Copyright (c) 2013 Calum Barnes
*/
#include <SPI.h>
#include <WiFi.h>
#include <HttpClient.h>
#include <Xively.h>


char ssid[] = "Tinker Lab";     //  your network SSID (name) 
char pass[] = "passwordXXXX";  // your network password
int keyIndex = 0;            // your network key Index number (needed only for WEP)

int status = WL_IDLE_STATUS;

// Your Xively key to let you upload data
char xivelyKey[] = "OAj0TV6KquAyLhQjR8T0dOxwzdm3ATl4ki9mWDXXXXXXXXX";  // just changed a few chars
//your xively feed ID
#define xivelyFeed 1763000000  // just changed a few numbers
//datastreams
char sensorID[] = "controller";
char ledID[] = "LED";

// Analog pin which we're monitoring (0 and 1 are used by the Ethernet shield)
#define sensorPin A2
//led connected pin
#define ledPin 9

// Define the strings for our datastream IDs
XivelyDatastream datastreams[] = {
  XivelyDatastream(sensorID, strlen(sensorID), DATASTREAM_FLOAT),
  XivelyDatastream(ledID, strlen(ledID), DATASTREAM_FLOAT),
};
// Finally, wrap the datastreams into a feed
XivelyFeed feed(xivelyFeed, datastreams, 2 /* number of datastreams */);

WiFiClient client;
XivelyClient xivelyclient(client);

void printWifiStatus() {
  // print the SSID of the network you're attached to:
  Serial.print("SSID: ");
  Serial.println(WiFi.SSID());

  // print your WiFi shield's IP address:
  IPAddress ip = WiFi.localIP();
  Serial.print("IP Address: ");
  Serial.println(ip);

  // print the received signal strength:
  long rssi = WiFi.RSSI();
  Serial.print("signal strength (RSSI):");
  Serial.print(rssi);
  Serial.println(" dBm \n");
}
void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);
  //pin setup
  pinMode(sensorPin, INPUT);
  pinMode(ledPin, OUTPUT);

  Serial.println("Starting single datastream upload to Xively...");
  Serial.println();

    // check for the presence of the shield:
   if (WiFi.status() == WL_NO_SHIELD) {
     Serial.println("WiFi shield not present"); 
     // don't continue:
     while(true);
   } 

  // attempt to connect to Wifi network:
  while ( status != WL_CONNECTED) { 
    Serial.print("Attempting to connect to SSID: ");
    Serial.println(ssid);
     status = WiFi.begin(ssid, pass);
    // wait 10 seconds for connection:
    delay(10000);
  } 
  Serial.println("Connected to wifi");
  printWifiStatus();
}

void loop() {
  //adjust LED level. set from Xively
  int getReturn = xivelyclient.get(feed, xivelyKey);    //get data from xively
  if(getReturn > 0){
    Serial.println("LED Datastream");
    Serial.println(feed[1]);
  }else Serial.println("HTTP Error");

  //write value to LED - change brightness
  int level = feed[1].getFloat();
  if(level < 0){
    level = 0;
  }else if(level > 255){
    level = 255;
  }
  //actually write the value
  digitalWrite(ledPin, level);

///////////////////////////////////////////////////////
  //read sensor values
  int sensorValue = analogRead(sensorPin);
  datastreams[0].setFloat(sensorValue);

  //print the sensor valye
  Serial.print("Read sensor value ");
  Serial.println(datastreams[0].getFloat());

  //send value to xively
  Serial.println("Uploading it to Xively");
  int ret = xivelyclient.put(feed, xivelyKey);
  //return message
  Serial.print("xivelyclient.put returned ");
  Serial.println(ret);
  Serial.println("");


  //delay between calls
  delay(15000);
}

我很确定这只是愚蠢的开始......

感谢您的帮助！斯蒂芬

Answer 1

当您收到错误时

HTTP错误

这意味着调用时出现问题：

xivelyclient.get(feed, xivelyKey);

因此，“feed”或“xivelyKey”都不正确。

首先，我要仔细检查你的钥匙是否正确。如果没问题，请检查您设置的Feed是否正确。

// Define the strings for our datastream IDs
XivelyDatastream datastreams[] = {
  XivelyDatastream(sensorID, strlen(sensorID), DATASTREAM_FLOAT),
  XivelyDatastream(ledID, strlen(ledID), DATASTREAM_FLOAT),
};
// Finally, wrap the datastreams into a feed
XivelyFeed feed(xivelyFeed, datastreams, 2 /* number of datastreams */);

通过查看此代码，您需要确保在Xively网站上正确设置了Feed;确保“sensorID”确实是“控制器”，并且“ledID”是“LED”。

我所做的相同观察适用于您致电时发生的错误：

int ret = xivelyclient.put(feed, xivelyKey);

使用Arduino WiFi Shield和Xively（WPA2）的HTTP错误

1 个答案: