LoRa Flipbooks

p. 9 Optimized For… Data Rate (Max) Frequency Band Range Security Typical Use Examples Classic Bluetooth (BR/EDR) Continuous data- streaming Up to 3 Mbps 2.4 GHz Up to 30 meters Secure Simple Pairing (SSP) • Wireless headsets • Wireless Printers • File transfer b/t Bluetooth devices Bluetooth (LE) Short burst data transmission 1 Mbps 2.4 GHz Up to 150 meters LE Secure Connections • Healthcare monitoring/reporting devices/sensors • Fitness tracking devices • Building automation (i.e., lights) Bluetooth 4.2 • Dramatically increased speed – 2.6x faster than older versions • Added privacy upgrades • Allowed chips to use Bluetooth over IPv6 (Internet Protocol version 6) for direct internet access Bluetooth 5.0 • Provides improved speed and range – 2x the speed, 4x the range, 8x broadcasting message capacity • Devices can synchronize their scanning (for connection) with other Bluetooth devices • Allows audio devices to communicate which reduces power use and increases battery life • Provides dual audio capabilities – Audio can play simultaneously on two connected Bluetooth devices. It can also stream two different audio sources to two separate Bluetooth devices at the same time Bluetooth 5.1 • Pinpoint location accuracy – It combines distance and direction to pinpoint the physical location of a connected device to the centimeter. If one of the devices has an array of multiple antennas, AOA (angle of arrival) and AOD (angle of departure) make distance measurement and direction more precise • Enables a quicker connection and less energy by performing a more aggressive caching of service discovery information. This allows the device to skip the service discovery stage if nothing has changed • Randomized indexing of advertised channels – It selects channels at random (rather than cycle through channels in a strict order as with Bluetooth 5.0). This decreases the chance that two Bluetooth devices will interfere with each other which is helpful in this every-expanding Bluetooth device environment The following chart summarizes the differences between Classic Bluetooth and the much-preferred Bluetooth Low Energy. Understanding Bluetooth Technology Bluetooth is a wireless technology that allows mobile Bluetooth devices to exchange data over short distances. The original Classic Bluetooth was designed to continually stream data over short distances. To put it simply, you can exchange a lot of data with Bluetooth as long as it's exchanged at close range. The more recently developed Bluetooth Low Energy, also known as BLE or Bluetooth LE and introduced in Bluetooth 4.0, is a low-power yet robust technology intended for situations where battery life is more important than high data transfer speeds. Although it far exceeds Classic Bluetooth on many fronts, the two are similar in a variety of ways: • They are both WPAN standards that operate in the 2.4 GHz frequency band • They both operate in a basic master-slave model where both Bluetooth devices must be paired before they can transmit data • Both use the same pairing, authentication, and encryption technologies. The most significant difference between the two technologies is that BLE uses far less power consumption than Classic Bluetooth. BLE is perfect for applications that sporadically send small amounts of data. In the healthcare world, this would be applicable to a variety of medical devices such as blood glucose monitors and pumps, asthma inhalers, and implantables (such as pacemakers and ICDs). The lower power properties of BLE make it effective for deploying environmental sensors and room monitoring to meet compliance requirements. BLE is an effective connectivity choice for distributed gateways that collect this data and pipeline it to cloud and server applications for analysis. Bluetooth 4.0 entered the technology market in 2011. Since that time, additional versions, including 4.2, 5.0, and 5.1 have been released. The following summarizes some of the enhancements each of these technology versions provide.

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