The difference between infrared, Bluetooth, ZigBee, wifi:
Infrared: a point-to-point transmission, wireless, can not be too far away from the direction of the direction, and can not have obstacles in the middle of the wall can not be through the wall, almost impossible to control the progress of information transmission.
Bluetooth: is also a short-range transmission of data with infrared transmission than can be 360 degrees short distance (about the effective distance of a few meters).
zigbee: is a short-range communication technology, characterized by close proximity, low complexity, self-organization, low power consumption, low data rate
wifi: wireless LAN networking technology standard, a LAN protocol, and NFC, Bluetooth can not be directly compared to the comparison is not comparable to this is the network technology standard, simply put is used to transmit LAN data, however, this is not correct. This is not correct, let's just understand it this way.
Infrared, Bluetooth, ZigBee, wifi applications:
Infrared: in rubber, plastics, fibers, adhesives, and other polymer material products, surface composition analysis, non-destructive testing has been widely used.
Bluetooth: in cell phones, headphones, PAD, digital cameras and digital cameras and other equipment have applications.
ZigBee: mainly suitable for automation and remote control field, can be embedded in a variety of devices.
wifi: a network node