I noticed at the iAutomate site that the RFID readers and active tags that they sell are made by Wavetrend.
I found this other article (from 2003) that focuses in Wavetrend business, but makes a general explanation of the technology and most important, the market.
Highlights:
About active RFID, the Wavetrend site says that their reader with more range have a minimum range of 3 meters and maximum range of 100 meters. That's not bad!
I also found that Wavetrend readers connect each other via a daisy-chain using RS-485. Optionally, the first reader can be connected to the PC via RS-232. I wonder if Elk would partner with Wavetrend to market a device that would connect directly to the Elk-M1 RS-485 bus. That will save us buying another serial expander when connecting the RFID antennas.
I found this other article (from 2003) that focuses in Wavetrend business, but makes a general explanation of the technology and most important, the market.
Highlights:
- Wavetrend seems to be one of the leaders in active RFID technology.
- Savi Technology is the other big player. Specially for logistics (inventories,etc.). They also partnet with Matrics.
- Wavetrend markets their products by partnering with other companies. That explains why iAutomate is selling Wavetrend's relabeled readers.
- There is one company marketing a product for prisons, that let the system monitor where is each inmate, officer and staff. Can you imagine doing something similar in your home?
- Most active RFID works in 433Mhz and causes interference to Ham radio. I dont like this.
About active RFID, the Wavetrend site says that their reader with more range have a minimum range of 3 meters and maximum range of 100 meters. That's not bad!
I also found that Wavetrend readers connect each other via a daisy-chain using RS-485. Optionally, the first reader can be connected to the PC via RS-232. I wonder if Elk would partner with Wavetrend to market a device that would connect directly to the Elk-M1 RS-485 bus. That will save us buying another serial expander when connecting the RFID antennas.