Hi, I have been following through the weather app demo for Arduino Uno and tweaked it for my academic project. But I can't seem to update my VendingMachineThing properties. I have used the exact same code apart from the server, appkey and name variables for a separate developer instance and it worked there. The service for my Thing is working properly. If it makes any difference, I am using an academic instance.
Here is the relevant code:
#include <Wire.h>
#include <Bridge.h>
#include <SPI.h>
#include <Ethernet.h>
#define propertyCount 2
byte mac[] = {0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED};
char server[] = "nanyangpolytech5511.cloud.thingworx.com";
EthernetClient client;
char appKey[] = "da2a1216-6935-47ef-9c58-80a31e49ef99";
char thingName[] = "VendingMachineThing";
int timeBetweenRefresh = 5000;
char serviceName[] = "setTemperatureAndHumidity";
char* propertyNames[] = {"Temp", "Humid"};
double propertyValues[propertyCount];
unsigned long lastConnectionTime = 0;
// state of the connection last time through the main loop
boolean lastConnected = false;
void setup()
{
//shut down the SD Card pins
pinMode(4,OUTPUT);
digitalWrite(4,HIGH);
// start serial port
Serial.begin(9600);
delay(500);
Serial.println("Trying to get an IP address using DHCP");
Ethernet.begin(mac);
Serial.print("My IP address: ");
Serial.print(Ethernet.localIP());
Serial.println();
}
void loop()
{
propertyValues[0] = sensors.getTempCByIndex(0);
propertyValues[1] = sensors.getTempCByIndex(0) + 50;
if (millis() - lastConnectionTime > timeBetweenRefresh) {
updateValues(propertyValues, client, server, appKey, thingName, serviceName, propertyNames);
}
Ethernet.maintain();
}
void updateValues(double values[] , EthernetClient &client, char server[], char appKey[], char thingName[], char serviceName[], char* sensorNames[])
{
char data[80];
strcpy(data, "?appKey=");
strcat(data, appKey);
strcat(data, "&method=post&x-thingworx-session=true");
if (client.connect(server, 443)) {
Serial.println("connected");
client.print("POST /Thingworx/Things/");
client.print(thingName);
client.print("/Services/");
client.print(serviceName);
client.print(data);
client.print("<");
for (int idx = 0; idx < propertyCount; idx++)
{
client.print("&");
client.print(propertyNames[idx]);
client.print("=");
client.print(propertyValues[idx]);
}
client.print(">");
client.println("HTTP/1.1");
client.print("Host: ");
client.println(server);
client.println("Content-Type: text/html");
client.println();
client.stop();
lastConnectionTime = millis();
// print the request out
Serial.print("POST /Thingworx/Things/");
Serial.print(thingName);
Serial.print("/Services/");
Serial.print(serviceName);
Serial.print(data);
Serial.print("<");
for (int idx = 0; idx < propertyCount; idx++)
{
Serial.print("&");
Serial.print(propertyNames[idx]);
Serial.print("=");
Serial.print(propertyValues[idx]);
}
Serial.print(">");
Serial.println(" HTTP/1.1");
Serial.print("Host: ");
Serial.println(server);
Serial.println("Content-Type: text/html");
Serial.println();
}
else {
// kf you didn't get a connection to the server:
Serial.println("the connection could not be established");
client.stop();
}
}
Here is the output:
I have also followed these steps:
1. Click on Subsystems under SYSTEM within the left pane of Composer
2. Click on PlatformSubsystem
3. Click on Configuration
4. Check the box next to Allow Request Method Switch to allow all REST API calls through a browser URL
5. Uncheck Filter Content-Type
