Send large numbers via wireless

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Send large numbers via wireless

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smihai

Hello,
I'm a newbie at wireless transmissions and the Jeenode at first.
I'm trying to send some values (uint16t) with the easySend but it tops at the value 255.
I use: rf12easySend(&temp, sizeof temp);
The reason for this is to send a temperature value (which in this case is signed and of course it gets over 255 (the last digit beeing the fractional part) any hints on achieving this ? I think it gets sent as different bytes but how do i get the number back together. Any help would be great (maby some links for some examples...)

Best regards

Posted 25/01/2010 12:19:53
smihai

i tried using the Map function from Arduino but this won't give me much resolution when having lots of variation from -20 to +50 degrees for temperatures for example, all of this scaled from 0-255. Any idea how can i adjust this ?

Posted 26/01/2010 13:56:19
jcw

Mihai - you're sending the right thing. The issue you have is with the receiving end. I'm assuming your using a JeeLink and some software on the PC? What you get back is a packet of 2 bytes, add 256 x the second byte to the first and you should have the original integer value. This is not a JeeNode issue, just a way to deal with multi-byte values in C.

Posted 26/01/2010 14:22:19
smihai

Thanks Jean-Claude!
I thought it was a programming thingie i didn't master :)
Well. i don't use any software at this time. i only want to recreate the value on the other JeeNode so that i can display it on a LcdPlug. Any chance of making this work on the node itself ?

Posted 26/01/2010 14:29:48