I am looking for a "presence" solution with in a 3-5 meter radius. It can be a always connected device or a beacon type (just transmitting signals periodically. It is does not need to be receiving anything)
Is it possible to use a smartphone as a zigbee end device? Or do I need a dedicated transmitter chip + battery to connect to a zigbee coordinator device ?
Are there any Zigbee active tags like RFID active tags (or zigbee beacons)?
I have read the new Zigbee input device standard, but I'm not sure if there is any device that comes in this category. Does the standard cover this kind of input device or is it just for consumer electronics?