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karthi27
Joined: 18 Nov 2009
Posts: 10
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| Help needed on PIC 16f877 wireless |
 Posted: Sat Jan 16, 2010 1:43 am |
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I need to transmit an 8bit code from one PIC IC to another PIC IC in the proximity of 10 feet...
Please suggest me the hardware and code / algorithm to get it done...
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Karthi |
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John P
Joined: 17 Sep 2003
Posts: 331
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| Posted: Sat Jan 16, 2010 11:44 am |
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An infrared LED on the transmitting PIC, and a receiver of the kind that's used for TV remote controls on the other end.
There are some subtle issues involved with using these devices, such as not transmitting all the time, and using a robust method to separate data from trash. But they're cheap and easy to interface.
Oh yeah, and you need line of sight communication, obviously. |
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Rohit de Sa
Joined: 09 Nov 2007
Posts: 282
Location: India
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| Posted: Sat Jan 16, 2010 11:48 am |
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Depends on _how_ you want to send the data - there's IR, bluetooth, ISM radio, etc. IR is the cheapest, followed by certain types of ISM radio. Bluetooth is the most expensive of the three methods.
You need to provide more information about what you want to send, data rates, if the transmission will be line-of-site or not, and other such factors.
Rohit[/list] |
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karthi27
Joined: 18 Nov 2009
Posts: 10
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| Posted: Sat Jan 16, 2010 9:58 pm |
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| Rohit de Sa wrote: | Depends on _how_ you want to send the data - there's IR, bluetooth, ISM radio, etc. IR is the cheapest, followed by certain types of ISM radio. Bluetooth is the most expensive of the three methods.
You need to provide more information about what you want to send, data rates, if the transmission will be line-of-site or not, and other such factors.
Rohit[/list] |
I need to transmit the temperature and blood pressure values through wireless means.
My program converts these analog values to 8 bit digital codes. I need to transmit these codes.
The transmission will be out of line of site, Maximum of about 15-20 feet, within a home...
What is the best mode of transmission?
Is Bluetooth advisable to use?
How do I interface it with my PIC microcontroller?
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Regards
Karthi |
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Rohit de Sa
Joined: 09 Nov 2007
Posts: 282
Location: India
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| Posted: Sat Jan 16, 2010 10:09 pm |
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| Quote: | | I need to transmit the temperature and blood pressure values through wireless means |
Is this a fun project? Or something commercial? It appears that you may be using this device in a hospital or in a medical setting with other (possibly) life support equipment. Wireless devices around medical setups are governed by strict laws and regulations. Please be aware while making such a device.
That being said, for unidirectional communication the RX433/TX433 radio pair is a good choice, which is also cheap.
Rohit |
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