Re: [PLUG] I2C Bus Length

According to Google, the max distance is ~9 - 12Ft. I'd be kind of skeptical that you could get that reliably. You also need to provide +5V to the sensor and sending that through 12 ft of cable isn't the easiest thing to do. You might want to look at Maxim (formerly Dallas) 1-Wire devices. These devices are supported on the Pi (& tons of other platforms). I have a Hobby-Boards Humidity/Temp sensor I want to hook up as an outdoor sensor. 1-Wire can run on Cat5. Check out the Weathertoys website (www.weathertoys.net) for more info on 1-wire in general and weather apps specifically.

HTH,
Tom

On 01/12/14, Casey Bralla<MailList@nerdworld.org> wrote:

I'm thinking about hooking up a temperature/humidity sensor to my Raspberry Pi. This sensor, looks like it would be easy to interface. However, the sensor comes with a 20-inch cable, and I'd like to have the sensor about 6 - 10 feet from the Pi.

I've never used the I2C bus before. Anybody have any ideas about the practical max distance from the Pi to the sensor?

Casey Bralla

Chief Nerd in Residence

The NerdWorld Organisation

www.NerdWorld.org

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