我正在尝试使用通过 Arduino GSM 扩展板连接的 Arduino 上传 Xively 提要。
Xively 没有发布任何关于 Arduino GSM 扩展板的具体示例。我尝试使用 Arduino GSM Pachube 客户端库更改“xively.com”中的“pachube.com”，但它不起作用。看来我的 GSM shield 可以连接但无法将数据发送到服务器。
在我的示例中，我创建了一个名为“Arduino GSM”的设备，其中只有一个名为“sensor1”的通道。在请求日志中，我无法读取任何传入的请求，尽管串行监视器显示与服务器的连接发生。
这是我试过的代码：
// Original GSM Pachube client modified for Xively
// Changes: pachube.com -> xively.com
// inserted APIKEY, FEEDID, USERAGENT
// inserted GPRS_APN, login, password
/*GSM Pachube client
This sketch connects an analog sensor to Pachube (http://www.pachube.com)
using a Telefonica GSM/GPRS shield.
This example has been updated to use version 2.0 of the Pachube.com API.
To make it work, create a feed with a datastream, and give it the ID
sensor1. Or change the code below to match your feed.
Circuit:
* Analog sensor attached to analog in 0
* GSM shield attached to an Arduino
* SIM card with a data plan
created 4 March 2012
by Tom Igoe
and adapted for GSM shield by David Del Peral
This code is in the public domain.
http://arduino.cc/en/Tutorial/GSMExamplesPachubeClient
*/
// libraries
#include <GSM.h>
// Pachube Client data -> changed in Xively Data
#define APIKEY "myapikey" // replace your pachube api key here
#define FEEDID 111111111 // replace your feed ID
#define USERAGENT "Arduino GSM" // user agent is the project name
// PIN Number
#define PINNUMBER ""
// APN data
#define GPRS_APN "WINDBIZ WEB" // replace your GPRS APN
#define GPRS_LOGIN "" // replace with your GPRS login
#define GPRS_PASSWORD "" // replace with your GPRS password
// initialize the library instance:
GSMClient client;
GPRS gprs;
GSM gsmAccess;
// if you don't want to use DNS (and reduce your sketch size)
// use the numeric IP instead of the name for the server:
// IPAddress server(216,52,233,121); // numeric IP for api.pachube.com
char server[] = "api.xively.com"; // name address for pachube API
unsigned long lastConnectionTime = 0; // last time you connected to the server, in milliseconds
boolean lastConnected = false; // state of the connection last time through the main loop
const unsigned long postingInterval = 10*1000; //delay between updates to Pachube.com
void setup()
{
// initialize serial communications and wait for port to open:
Serial.begin(9600);
while (!Serial) {
; // wait for serial port to connect. Needed for Leonardo only
}
// connection state
boolean notConnected = true;
// After starting the modem with GSM.begin()
// attach the shield to the GPRS network with the APN, login and password
while(notConnected)
{
if((gsmAccess.begin(PINNUMBER)==GSM_READY) &
(gprs.attachGPRS(GPRS_APN, GPRS_LOGIN, GPRS_PASSWORD)==GPRS_READY))
notConnected = false;
else
{
Serial.println("Not connected");
delay(1000);
}
}
}
void loop()
{
// read the analog sensor:
int sensorReading = analogRead(A0);
// if there's incoming data from the net connection.
// send it out the serial port. This is for debugging
// purposes only:
if (client.available())
{
char c = client.read();
Serial.print(c);
}
// if there's no net connection, but there was one last time
// through the loop, then stop the client:
if (!client.connected() && lastConnected)
{
client.stop();
}
// if you're not connected, and ten seconds have passed since
// your last connection, then connect again and send data:
if(!client.connected() && ((millis() - lastConnectionTime) > postingInterval))
{
sendData(sensorReading);
}
// store the state of the connection for next time through
// the loop:
lastConnected = client.connected();
}
/*
This method makes a HTTP connection to the server.
*/
void sendData(int thisData)
{
// if there's a successful connection:
if (client.connect(server, 80))
{
Serial.println("connecting...");
// send the HTTP PUT request:
client.print("PUT /v2/feeds/");
client.print(FEEDID);
client.println(".csv HTTP/1.1");
client.print("Host: api.xively.com\n");
client.print("X-ApiKey: ");
client.println(APIKEY);
client.print("User-Agent: ");
client.println(USERAGENT);
client.print("Content-Length: ");
// calculate the length of the sensor reading in bytes:
// 8 bytes for "sensor1," + number of digits of the data:
int thisLength = 8 + getLength(thisData);
client.println(thisLength);
// last pieces of the HTTP PUT request:
client.print("Content-Type: text/csv\n");
client.println("Connection: close");
client.println();
// here's the actual content of the PUT request:
client.print("sensor1,");
client.println(thisData);
}
else
{
// if you couldn't make a connection:
Serial.println("connection failed");
Serial.println();
Serial.println("disconnecting.");
client.stop();
}
// note the time that the connection was made or attempted
lastConnectionTime = millis();
}
/*
This method calculates the number of digits in the
sensor reading. Since each digit of the ASCII decimal
representation is a byte, the number of digits equals
the number of bytes.
*/
int getLength(int someValue)
{
// there's at least one byte:
int digits = 1;
// continually divide the value by ten,
// adding one to the digit count for each
// time you divide, until you're at 0:
int dividend = someValue /10;
while (dividend > 0)
{
dividend = dividend /10;
digits++;
}
// return the number of digits:
return digits;
}