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Connecting multiple temperature sensors to FEZ Spider


#1

I’m about to purchase FEZ Spider for my mini project and I’m wondering if it’s possible to connect 5 temperature sensors to it (maybe more in the future)? If yes what is the best option and what modules do I need?

Thanks, Greg


#2

In general yes, but What kind of sensor are you thinking about?


#3

First I was thinking of Temp&Humidity Module but there aren’t 5 I connectors on the board. Now after googling for a while I found this: One Wire Digital Temperature Sensor - DS18B20. Maybe I could connect 5 of these on extender module?

Thanks


#4

If I understand correctly (I’m still new to all this stuff) can I use this module http://www.ghielectronics.com/catalog/product/273 and wire all sensors (DS18B20) to VCC and GND, and data wires to P3-P7?


#5

Absolutely! P8 and P9 are available as well.


#6

You can buy DL40 or IO60P16 and sensor SHT11/SHT15 (used on Temp/Humidity module) download sensors drivers http://gadgeteer.codeplex.com/SourceControl/changeset/view/24955#158030 and modify constructor to use pins on DL40 or IO60P16 and you can have a few hundred sensors on 1 Spider.


#7

the great thing about DS18B20 family of onewire sensors is that they’re designed to work over long distances. You can have 5 Temp+Humidity sensors but you’d be limited to how far away you could get them to work, where with DS18B20 you can have them scattered around the house no problem.


#8

Also when you’re using OneWire you can share multiple devices on a single pin, no need to have different pins.


#9

Thank you all for the valuable information. Now it’s time to order a FEZ Spider and have some fun!