O'Reilly logo

BeagleBone Essentials by Rodolfo Giometti

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

Getting access to 1-Wire devices

To show you how the 1-Wire bus works, we can use a really simple chip: the temperature sensor chip DS18B20. There are two possible ways or modes by which the chip can be powered: a parasite version (that is, which works in the parasite mode), with two wires only, and a normal version with a dedicated power pin, which uses the three wires instead.

In this example, I'm going to use the three wire's waterproof version of this chip, which implements a special packaging of the chip that can be used in hostile environments (see the following figure for the images of the two chip's packaging version):

Getting access to 1-Wire devices

Note

The device can be ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required