Tom's Life Bits

• Default login is root and password is arduino

In order to use the DD-Wrt side of the YUN with Arduino it is necessary to use the bridge function. This example shows using an MQTT client on the Arduino side hooked to the DD-Wrt side with the bridge.

   #include <pubsubclient.h>
   #include <yunclient.h>
   void callback(char* topic, byte* payload, unsigned int length) {
   // handle message arrived
   }
   YunClient yun;
   PubSubClient client("192.168.2.210", 1883, callback, yun);
   void setup()
   {
   Bridge.begin();
   } 

Instead of doing this with EthernetClient, on say, a Duemilanove with an Ethernet shield:

   #include <Ethernet.h>
   ...
   EthernetClient eth;
   PubSubClient mqtt(MQTT_SERVER, MQTT_PORT, callback, eth);
   ...
   Ethernet.begin(mac);
   ...
   mqtt.connect(MQTT_CLIENTID, ....);

you do this with the Yun:

   #include <YunClient.h>
   ...
   YunClient yun;
   PubSubClient mqtt(MQTT_SERVER, MQTT_PORT, callback, yun);
   ...
   Bridge.begin();
   ...
   mqtt.connect(MQTT_CLIENTID, ....);

The bridge opens the connection to the outside world from the Arduino via the OpenWRT host.