This weekend I built a simple temperature sensor with #arduino  and got it sending information to #cosm  via the #gsm  shield, using the #bluevia SIM for data. Even after a year working on this project, this was actually the first time I was able to test the whole thing end to end myself, as a user would do (including purchasing the shield and the Arduino kit itself through online store, activating the SIM and adding balance to it, etc...). The results can be seen below and here: where you can get an updated feed and graph of the temperature in my living room. It's a pretty simple project but especially since I have been swanning around London telling people how easy it would be to build a connected temperature sensor with this shield, it was gratifying to see that I was right. :) The project uses the Cosm libraries and is built on top of the Cosm example code, but uses the GSM libraries instead of the Ethernet shield ones. In putting it together I realized one of the differences between writing an IoT application for the GSM shield (as opposed to Ethernet or Wifi) will be keeping data volume to a minimum. Also the Cosm example code just activates the network and keeps it active even when the Arduino is just sitting idle, whereas on GSM you'd want to connect and disconnect, especially if you are on battery power.

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