I am working on an a Raspberry Pi based, Internet connected indoor air quality monitor called LiV Pi. LiV is an open source hardware and software project. LiV measures temperature, humidity, air pressure and CO2 levels. I wanted to be able to write measurements data from Raspberry Pi into DeviceHive, a open source IoT platform. Please refer to gitHub link for a code sample. In the rpi_example.py look for DATA PUSH comment and replace the data source with your own. You will need to register with DeviceHive and create an account.