Basic Raspberry Pi Temperature Sensor



DeviceHive is powerful and yet easy. To make it even easier to understand, let’s take this simple example of the fun project that you can build in just a few hours. How about building a remote temperature sensor and a remotely controlled LED? This can be a very good starting ground, which you can take further. Think replacing LED with power relay and controlling light in your room, and adding humidity sensor and, say, light sensors to better monitor the environment and report everything on your mobile device?
This sample can work on virtually any embedded linux board which has (1) python (2) 1-wire kernel drivers
In order to do this, you will need:

• Rasbperry Pi Rev. B (http://raspberrypi.org) or any other inexpensive Embedded Linux development board, like gumstix, or beaglebone.
• Dallas 1-wire temperature sensor: DS18B20 – available everywhere :-).
• Any LED
• 510 ohm resistor for LED and 4.7K ohm (or so) resistor for DS18B20
• Breadboard

The schematic is as follows, the sensor will be powered from RasPi’s Pin 2, no external power needed:

 

 

Read more...