xylem update to use ethernet module

xylem/xylem.pde

@@ -1,13 +1,35 @@
-// part of the groworld HPI prototype
+///////////// part of the groworld HPI prototype 
 
 #include <stdio.h>
+#include <Ethernet.h>
+#include "pachube_api_key.h" // local include containing API key
 
 #define lightpin 1  // light sensor on analog pin 1
 #define humidpin 0  // humidity sensor on analog pin 0
 #define power 8     // power for sensors
 
 unsigned long then = 0; // timer which will run for < 50 days
-unsigned long interval = 1; // interval between reads in seconds
+unsigned long interval = 60; // interval between reads in seconds
+
+char display[64];
+
+////////////// ethernet & network config
+
+byte mac[] = {0xFE,0xEB,0xDA,0xCC,0xFE,0xED}; // MAC address
+byte ip[] = {192,168,1,19};       // local ip
+byte gateway[] = {192,168,1,1};   // gateway
+byte subnet[] = {255,255,255,0};  // netmask
+//byte server[] = {192,168,1,25}; // local listener %nc -l 80
+byte server[] = {209,40,205,190}; // pachube server
+Client plient(server, 80);
+
+///////////// pachube config
+
+#define SENSOR_FEED_ID  1951  // http://www.pachube.com/feeds/1951
+char pachube_data[70];
+int content_length;
+
+///////////// set up & send
 
 void setup()  
 { 
@@ -15,9 +37,43 @@ void setup()
   pinMode(humidpin, INPUT);
   pinMode(lightpin, INPUT);
 
+  Ethernet.begin(mac, ip, gateway, subnet);
   Serial.begin(9600); 
 }
 
+
+void send_data ()
+{
+  if (plient.connect() ) {
+
+    // send comma-separated values to update Pachube datastreams
+    
+    Serial.print("connecting...\n");
+    
+    sprintf(pachube_data,"%d,%d", lightlevel(), moisturelevel());
+    content_length = strlen(pachube_data);
+    
+    plient.print("PUT /api/");
+    plient.print(SENSOR_FEED_ID);
+    plient.print(".csv HTTP/1.1\nHost: pachube.com\nX-PachubeApiKey: ");
+    plient.print(PACHUBE_API_KEY);
+    
+    plient.print("\nUser-Agent: Arduino (groworld)");
+    plient.print("\nContent-Type: text/csv\nContent-Length: ");
+    plient.print(content_length);
+    plient.print("\nConnection: close\n\n");
+    plient.print(pachube_data);
+    
+    plient.print("\n");
+    plient.flush();
+    plient.stop();
+   }   
+   else {
+         Serial.print("not connected!\n");
+   }
+}  
+  
+
 int lightlevel () 
 {
   int light = 0;
@@ -34,15 +90,19 @@ int moisturelevel ()
       return moist; 
 }
 
-char display[64];
+
+
+///////////// main loop. sends data to pachube and prints values to serial line
 
 void loop() 
 { 
     if (millis() - then > interval*1000) {
       then = millis(); 
+      send_data();
       sprintf(display, "%u,%u,%u\n", (unsigned int)then, lightlevel(), moisturelevel());
       Serial.print(display);
   }
 }
 
+/////////////