Forms of wireless data transmission

Discussion in 'Computing and Networks' started by Sparky49, Jul 27, 2011.

  1. Sparky49

    Thread Starter Active Member

    Jul 16, 2011
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    Hi all,

    I've not delved into this part of the forum before, so my apologies if this is in the wrong section!

    A little bit of back - story.:D

    I have an idea to measure air pressure, and then to have it sent to a laptop or smart phone, where it is display real time on a graph.

    I've looked into ways of sending the data, such as bluetooth, but the problem is that if I wanted to produce and market these, I think I'd have to pay for a licence.

    I'm not wanting to make the product on a large scale, no way would I produce 3'000 units!!:eek:With the licences costing about $4000, there is no way I could afford to incorporate something like Bluetooth.

    I was wondering, if anyone could suggest a means of transferring the data which is free? Or perhaps I have mis-understood the licence fees?

    Thankyou for you time,

    Sparky
     
  2. blueroomelectronics

    AAC Fanatic!

    Jul 22, 2007
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    What's the target cost & quantity of your device?
     
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  3. praondevou

    AAC Fanatic!

    Jul 9, 2011
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    I would be interested in knowing where you got this license information for BT from?

    You can certainly transmit your data via an of the shelf RF-module to a device to your computer which communicates via RS232 with your computer.
     
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  4. Sparky49

    Thread Starter Active Member

    Jul 16, 2011
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  5. praondevou

    AAC Fanatic!

    Jul 9, 2011
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    Well, I can't help with the license fees, it seems that if you want to use their BT stack you'll have to pay for it. What if you use a BT device off the shelf and try to hack it to transfer the data to your computer? Would you still need to pay license fees?

    Well, I'd definitely go the RF-module and RS232 or USB way. I even think properly encoded on the transmitter side I would be able to just read the decoded signal on the receiver side if just plugged in into the RS232, at least if I use a low baudrate. Thus I wouldn't need a PIC in the receiver device to handle communication...
     
    Last edited: Jul 27, 2011
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  6. praondevou

    AAC Fanatic!

    Jul 9, 2011
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    I found this ebay item: 200393339984. It's a USB to TTL converter. From there I guess it takes a PIC and RF-receiver module... Cost shouldn't be higher than:

    USB-TTL converter - $5
    small PIC + external components - $3
    RF receiver module e.g. MICRF007 + crystal - $6
    enclosure - $1
    PCB - no idea :confused:

    $15 + pcb + software development (for the receiver)
    Are there fees for using USB drivers commercially as well?
     
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