I have been using two Loc8tor devices (an active, highly directional RFID consumer device) on a personal robot to try to locate an RFID tag.
While the Loc8tor has served its purpose of showing an active, directional RFID sensor with high resolution can be used for locating an RFID tag, the Loc8tor itself is not very hacker friendly. I am looking for an alternative reader and tag that can be integrated into my robot.
Ideally, it would meet the following specifications:
- Each reader would be less than $100, cheaper is definitely better
- The reader should be around the size of a credit card to a dollar bill
- The tag will be placed in ranges of 0.5 to 3 meters from the reader
- The reader should run on some voltage less than 5v, ideally 3.3v or less
- The higher the resolution of the reader, the better. Say 3 cm resolution at a 1 meter distance.
- The (RSSI?) value from the sensor is easily accessible. Meaning I could wire that into an Arduino input pin and use the value.
- Could buy in small (1 to 2) or large quantities (100+)
These specifications are ideal, but not all are required (though the price is the most important). I should hopefully be able to list better specifications after I see what alternatives are out there.