Add temperature sensor support

DeqingSun · Jul 20, 2013 · 497bf56 · 497bf56
1 parent 20b7639
commit 497bf56
Show file tree

Hide file tree

Showing 2 changed files with 94 additions and 2 deletions.
diff --git a/sketch_XMPP/sketch_XMPP.ino b/sketch_XMPP/sketch_XMPP.ino
@@ -5,6 +5,10 @@
 
 #include <XMPPClient.h>
 
+#include <OneWire.h>
+
+
+
 byte mac[] = { 
   0x00, 0x11, 0x22, 0x33, 0x44, 0x55 };
 char server[] = "wtfismyip.com";
@@ -16,13 +20,27 @@ XMPPClient client;
 
 int led = 9;
 
+byte addr[8];
+char buffer [50];
+
+OneWire  ds(A2);  
+
 void setup()
 {
   Serial.begin(9600);
   pinMode(led, OUTPUT);  
-  client.xmppLogin(server, username, password, resource, mac);
+  Serial.println(F("Initialization..."));
+  while(client.xmppLogin(server, username, password, resource, mac)<=0){
+    delay(1000);
+    Serial.println(F("TRY RECONNECT"));
+  }
   client.sendPresence();
-  //client.sendMessage("bareboneglass@appspot.com","hello");
+
+  pinMode(A1,OUTPUT);
+  pinMode(A3,OUTPUT);
+  digitalWrite(A1,LOW);
+  digitalWrite(A3,HIGH);
+  init_18b20();
 }
 
 
@@ -32,7 +50,19 @@ void loop() {
     Serial.println(message);
     if (strstr(message,"on")!=NULL) digitalWrite(led, HIGH);
     if (strstr(message,"off")!=NULL) digitalWrite(led, LOW);
+    if (strstr(message,"temperature")!=NULL) {
+      unsigned int a=get_temperature();
+      unsigned char i_p=a/16;
+      unsigned char f_p=(a%16)*6+(a%16)/4;
+      sprintf (buffer, "/push Temperature is: %d.%02dC", i_p,f_p);
+      client.sendMessage("bareboneglass@appspot.com",buffer);
+    }
   }
 }
 
 
+
+
+
+
+
diff --git a/sketch_XMPP/temperature.ino b/sketch_XMPP/temperature.ino
@@ -0,0 +1,62 @@
+void init_18b20(){
+  unsigned char i;
+
+  if ( !ds.search(addr)) {
+    Serial.println("No more addresses.");
+    Serial.println();
+    ds.reset_search();
+    delay(250);
+    return;
+  }
+
+  if (OneWire::crc8(addr, 7) != addr[7]) {
+    Serial.println("CRC is not valid!");
+    return;
+  }
+  Serial.println();
+}
+
+unsigned int get_temperature(){
+  byte i;
+  byte present = 0;
+  byte type_s;
+  byte data[12];
+
+  float celsius, fahrenheit;
+
+
+
+  ds.reset();
+  ds.select(addr);
+  ds.write(0x44, 1);        // start conversion, with parasite power on at the end
+
+  delay(1000);     // maybe 750ms is enough, maybe not
+  // we might do a ds.depower() here, but the reset will take care of it.
+
+  present = ds.reset();
+  ds.select(addr);    
+  ds.write(0xBE);         // Read Scratchpad
+
+  for ( i = 0; i < 9; i++) {           // we need 9 bytes
+    data[i] = ds.read();
+  }
+
+  // Convert the data to actual temperature
+  // because the result is a 16 bit signed integer, it should
+  // be stored to an "int16_t" type, which is always 16 bits
+  // even when compiled on a 32 bit processor.
+  int16_t raw = (data[1] << 8) | data[0];
+
+  byte cfg = (data[4] & 0x60);
+  // at lower res, the low bits are undefined, so let's zero them
+  if (cfg == 0x00) raw = raw & ~7;  // 9 bit resolution, 93.75 ms
+  else if (cfg == 0x20) raw = raw & ~3; // 10 bit res, 187.5 ms
+  else if (cfg == 0x40) raw = raw & ~1; // 11 bit res, 375 ms
+  //// default is 12 bit resolution, 750 ms conversion time
+  return raw;
+  //celsius = (float)raw / 16.0;
+
+  //return celsius;
+}
+
+