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背景：我正在尝试从一个简单的开关传感器上传数据以学习 Xively 方法。我正在使用带有 WiFi Shield 的 Arduino Uno。我对 Xively 库中的示例草图进行了一些简单的修改，以使其非常简单。我已阅读文档和常见问题解答，并在网上搜索过。有一个类似的问题（Can't connect to Xively using Arduino + wifi shield，“ret = -1 No sockets available），答案是减少加载的库数量。我使用的是推荐的相同库列表post.我还更新了我的 Arduino IDE 并下载了最新的 xively 和 HTTP 库。代码编译没有错误。我在 xively 网站上重新加载了我的设备并获得了新的 API 密钥和编号。另外，我确保通道添加了正确的传感器名称。

问题：我在 Xively 网站上看不到数据，并且在 Arduino 的串行监视器上不断收到以下错误消息：

xivelyclint.put 返回 -1

此外，经过几次尝试，我得到“没有可用的套接字”

问题：代码有问题还是其他问题？

当前的 Arduino 代码（实际 ssid、密码和 API 密钥和号码已删除）：

#include <SPI.h>
#include <WiFi.h>
#include <HttpClient.h>
#include <Xively.h>

char ssid[] = "ssid"; //  your network SSID (name) 
char pass[] = "password";    // your network password (use for WPA, or use as key for WEP)
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[] = "api_key";

// Analog pin which we're monitoring (0 and 1 are used by the Ethernet shield)
int sensorPin = 2;

// Define the strings for our datastream IDs
char sensorId[] = "sensor_id";
XivelyDatastream datastreams[] = {
  XivelyDatastream(sensorId, strlen(sensorId), DATASTREAM_INT),
};
// Finally, wrap the datastreams into a feed
XivelyFeed feed(feed no., datastreams, 1 /* 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");
}
void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);

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

  // 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() {
  int sensorValue = digitalRead(sensorPin);
  datastreams[0].setInt(sensorValue);

  Serial.print("Read sensor value ");
  Serial.println(datastreams[0].getInt());

  Serial.println("Uploading it to Xively");
  int ret = xivelyclient.put(feed, xivelyKey);
  Serial.print("xivelyclient.put returned ");
  Serial.println(ret);

  Serial.println();
  delay(15000);
}
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