Arduino Uno and DHT11 basic temperature-humidity sensor

It is easy integrate DHT11 temperature and humidity sensor with Arduino Uno board. You can find enough resources in the web how to connect DHT11 with Arduino.

Measured temperature and humidity can publish to a Web via APIs supported by cosm.com.

You can find the working code in the Github.

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How to fix Arduino porgram upload issues with Ubuntu

When you upload the program to Arduino UNO board you may get an error saying

Serial port ‘/dev/ttyACM0’ not found. Did you select the right one from the Tools > Serial Port menu?

This error occurs when user do not have write privileges to device /dev/ttyACM0. User can fix this issue by giving enough rights to user or simply give all writes to the device. ( chmod  777 /dev/ttyACM0 [this is a hack ;)])