Electronics > Electronics

which wireless connection should I buy?

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JoeStrout:
I need to hook up a simple wireless connection between my laptop and my robot. I'm on a tight budget, so economy is the key feature I'm looking for. Range is not important (I'll never be standing more than a couple meters away), and data rate isn't particularly important either (I'll be sending very small amounts of data). Two-way communications isn't necessary at this point; the robot needs to receive but doesn't need to data.  I should add that I'm in the U.S., and would prefer not to order overseas if I can avoid it.

Any recommendations?

Thanks,
— Joe

Admin:
how does your robot communicate?

considered bluetooth?
http://www.societyofrobots.com/electronics_bluetooth_robot.shtml

JoeStrout:

--- Quote from: Admin on December 25, 2006, 07:33:10 PM ---how does your robot communicate?
--- End quote ---


That's exactly the question I'm asking.  How should it?


--- Quote from: Admin on December 25, 2006, 07:33:10 PM ---considered bluetooth?
http://www.societyofrobots.com/electronics_bluetooth_robot.shtml

--- End quote ---


Yes, but I'm not a big fan of it.  First, I've found Bluetooth to be a bit fiddly, even on commercial devices (like my laptop and PDA).  Second, it's expensive — SparkFun Bluetooth modules seem to run about $60.

Someone recently pointed me to this $12 RF link, which is more in line with my budget.  Any opinions on this one?

Thanks,
— Joe

Admin:
well, most people use serial, but usb is becoming popular, too. most development boards come with either serial or usb, the latter being a little more expensive.

bluetooth should be reliable, has good range, its high speed, simple to use, and handles interference very well. but yea, its a bit pricy.

looking at the site for the RF link device, my impression of it is that its good, although a bit slow at only 2400bps. note that its only for one way, meaning one only recieves, and the other only transmits. if you get a second pair ($24), you can transmit and recieve data.

you might find this post very helpful
http://www.societyofrobots.com/robotforum/index.php?topic=104.0

Admin:
Ive recently heard a lot of good things about the XBee™ ZigBee OEM RF Module ($19)
http://www.maxstream.net/products/xbee/xbee-oem-rf-module-zigbee.php

a tutorial on how to use the XBee here:
http://itp.nyu.edu/~raf275/meshnetworking/XBee/XBee_example.html

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