Tracks the temperature with Lights display current status.

Parts you need

  • Temperature Sensor LM335Z
  • 3 x LED (optional)
  • 4 x 220 Ohm Resistors (3 are optional)
  • Arduino Uno + Power Supply
  • Ethernet Shield
  • Wires
  • Network Cable
  • Breadboard

What it does

The temperature is read every 10 minutes. The value is then transmitted to Nimbits' server (I used The web-interface returns nice charts or e.g. a csv of your values.

I used this setup to optimize my heating system at home.

Some advice

Had some trouble calibrating the temperature sensore since the values depend on the voltage applied. Some amount of fiddling is required.

Make sure you read the documentation at There's whole bunch of demo code that will get you started quickly.

Nimbits also let's define alerts. E.g. it will send you a message on GTalk once a certain temperature is reached. It's definitely worth playing around with it.

My ino-code isn't really fancy, but it ran stable for almost 2 month.

Don't hesitate to give me feedback.