I got this WizNet Ethernet Shield that i wanted to try out with the Arduino since the CC3000s proved to be a complete disaster. The shield appeared to be of chinese make and quiet different from the original Arduino Ethernet shield. I stacked my Sparkfun Weather shield on top of it as shown below only to find out that there was no provision to connect the I2C lines from the Arduino. SDA and SCL were not brought out onto the ethernet shield. Even the IOREF pin was not connected which was not helping the weather shield as the temperature and humidity sensor were interfaced using I2C and also needed the reference voltage. Looks like i have to tryout the original arduino ethernet shield sometime which has the I2C header present.Anyways i can only acquire the light sensor data using sparkfun shield using the existing setup.
Alternatively to test how effective the ethernet shield was i sent a value of 0 and 50 alternatively every 2 seconds to the Xively website. The code for that is shown below. Also shown below is the screenshot from the Xively site displaying the incoming data in the graph. Ideally the graph is supposed to be a continuous " saw waveform". The gaps that you can see are the connection to the xively site failing. It takes some amount of time to get back online. But it does recover unlike the CC3000 that goes into some infinite loop. So, apart from the fact that the I2C is messed up, i kinda like this shield. I hope the guys who made this shield add those I2C headers.... :)
