U-blox is claiming sub-metre indoor accuracy with development kits for Bluetooth direction-finding and positioning. “Recognising the growing demand for more accurate indoor positioning solutions,” according to u-blox, “Bluetooth SIG released Bluetooth Direction Finding, offering a major improvement over previous receiver signal strength-based [‘RSSI’] solutions.” It works with mobile tags and ‘anchor points’, which are fixed detectors. ...

This story continues at Sub-metre accuracy claimed for indoor Bluetooth positioning kits

Or just read more coverage at Electronics Weekly