Wirelless temperature sensors

Robby Timmermans

Hi,

I'am a java programmer and i want to make an application that monitors the temperature in different rooms in my house. (garage, living, bedroom, attic, etc...)

How can I send (multiple) sensor values to an rs232 port on my pc?

Thanks in advance...

Robby

jmspaggi

Hi Robby,

Do you need all those sensors linked to the javelin, then the javelin linked wireless with your PC? Or all the sensors linked wireless to the Javelin, and the the Javelin wire linked to your PC?

For the first solution, you can connect some DS1620 to your javelin. Using the 3-wires, you can share 2 wires for all you sensors (Clock and data) and have 1 pin use per sensor (garage, living, etc.). Javelin class already exist for this component.

Then you connect you Javelin to a 433MHz transmitter, and you PC to a 433Mhx receiver (Using a MAX232). http://www.parallax.com/Store/Accessories/Communication/tabid/161/CategoryID/36/List/0/Level/a/ProductID/112/Default.aspx?SortField=ProductName,ProductName

If you want to do the 2nd solution, then it's more complicate because you need to power each point of control with a DC line, have a transmitter and a controleur for each point, but I'm even not sure if you can have more than one transmitter per receiver... Would be nice if it works, so we will have to wait for some other experts to reply [noparse];)[/noparse]

Hope it helps.

JM

Robby Timmermans

I think the best solution is the 2nd solution, otherwise I need to provide cables to all my rooms.

Is it possible to talk to the ds1620 without a javelin? Via a serial connection to my pc?