Greets. I have a headache. I have a body-wearable electronics package, battery operated, which is generation on the order of 5 mbits/second of data which needs to be RF linked to a PC within 100-200 feet. While there is no real reason the link itself needs to be an 802.11 link, utlimately, the data stream reaching the computer needs to be in TCP/IP UDP packets. (I can handle generating the UDP packets at the recevier end of the RF link, if need be). My problem is getting the data from the body-wearable package TO a receiver. I have been looking at various solutions. My personal favorite would have been Zigbee (IEEE 802.15.4) but the data bandwidth is simp;ly not there. So, not finding anything else with sufficient bandwisfth and range, I find myself pretty much forced to lpook at 802.11. PROBLEM: how do I talk to an 802.11a/b/g WLAN adapter from an AVR? Should I choose a USB enabled AVR, and use a USB WLAN NIC? Or should I try to use a PCMCIA or CF card WLAN adapter? From what little I've been ab;e to find out, getting the necessary technival information to successfully communicate with and control PCMCIA and CF card adapters is difficult, at best. (I also worry about the physivcal/electrical aspects of the interface). I have plenty of bandwidth avai;labe in the AVR which will be cointrolling the RF card...only about 5% of itsresources are tied up in collecting the data stream from 4 uCs, each doing ADC on 32 channels of sensor data (2000 12 bit samples/sensor/second, total). Going to implement a 16 bit data bus betwixt all the processors on the PCB (cheating, I know, but serial links just didn't look fesasible). So, what say ye, freinds and mentors? Any suggestions, pointers to documents from which I can learn needed information/skills, criticisms, condemnations, proposals for committment, etc., etc? tom (aka avrFreak on eFnet IRC network)
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RF data communications headache
2006-03-12 by Thomas Keller
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