Society of Robots - Robot Forum
Electronics => Electronics => Topic started by: blingbling on October 24, 2010, 04:35:33 PM
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Hi guys im very new to this i repair plasmas so im a bit tech minded but not when it comes to rf or bluetooth. what im trying to do is build a simple cheap sender and receiver i have a sensor down at the dam and i want to have a little display to come up with temp from sensor ive looked at rf but i dont know if i can transfer data were as bluetooth i should be able to do it can anyone show me how to build this or what would be the best option. i know its off topic? thank you
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Check the XBee modules from Digi International.
There are discussion here on SoR and other places.
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Hi,
[...] i have a sensor down at the dam and i want to have a little display to come up with temp from sensor ive looked at rf but i dont know if i can transfer data were as bluetooth i should be able to do it
You didn't say how far away the dam is, but if you can do it with BlueTooth, it must be within 100m (300'), so take a look at this transmitter (http://www.sparkfun.com/commerce/product_info.php?products_id=8945) and this receiver (http://www.sparkfun.com/commerce/product_info.php?products_id=8948).
$9,- a pair and with a much better range than BT (500' vs. 300').
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In case you are wondering, the reason why bluetooth is so expensive is because it supports much higher data rate (this is irrelevant for your project), has high resistance to interference, and supports encryption/authentication.
In your case, only the interference resistance may matter, especially if you want to do multiple connections in close proximity (you can't do that with the $9 pair, because they don't do any frequency hopping, and doesn't support channels).
But then it only costs a tiny fraction of bluetooth.