 Welcome myself Mr. Vishal Angeere and today we are going to study Bluetooth architecture and profiles. Learning outcome at the end of this session students will be able to explain Bluetooth architecture and profiles. So before starting with Bluetooth architecture and profiles student must know what is Bluetooth and variants of Bluetooth technologies like BR that is Base Rate, EDR Enhanced Data Rate and another variant is Bluetooth Low Energy. Now we start Bluetooth technology block diagram. So this is Bluetooth technology block diagram in which we can say that there are three different physical layers, middle one is BR EDR that is Basic Rate or Enhanced Data Rate and the left of that BR or Classical type of Bluetooth technology there is AMP that is Alternative MagPhi and to the right of that classical variant of Bluetooth technology there is Bluetooth Low Energy. So as we can say that in BR the physical layers are Link Controller and Manager and BR EDR Baseband and in case of Bluetooth Low Energy there is Low Energy Link Layer. As well as in this block diagram we can say that there are different protocols which are to be used those are OBEX, RFCOM and AVDP etc and it will have different BR profiles in case of basic rate and those profiles are A2DP profile that is used for audio distribution, AVRCP which is to be used for changing of audio tracks and third one is HFP which is to be used in vehicles or in cars for receiving or connecting calls. So this is for classical variant of Bluetooth technology there is another profile which is to be called as SDP that is Service Discovery Profile and in case of Low Energy there is Attribute Protocol, Generic Attribute Profiles and many different profiles are to be used in case of Bluetooth Low Energy. So as it looks complicated but the block diagram of Bluetooth technology is very much simple next we are going to see architecture of Bluetooth technology for these variants that is BR only and LE only. So in case of classical variant of Bluetooth technology we can see that there is Serial Port Profile, RCOM Protocol, L2CAP that is Logical Link Control and Adaptation Link Manager, Basic Rate RF and there is another architecture for Bluetooth Low Energy which consists of Generic Attribute Profile, Attribute Protocol, L2CAP that is Logical Link Control and Adaptation, Link Layer and Low Energy RF. So thing is when these two different variants want to communicate with each other there should be a mediator between these two type of variants or two type of devices because there are different profiles, different protocols, different basic rates for RF. So in that case the mediator between these two different variants of Bluetooth is Jume Mode Chip. So the Jume Mode Chip is to be used to communicate or to interact with these two different type of variants used in Bluetooth technology. So the mediator or Jume Mode Chip will have Link Manager for both BR and LE variant of Bluetooth technology as well as it will have Link Layer, this Jume Mode Chip will have same analog circuitry as present in BR and LE but it will have something different circuitry for digital circuits or digital connections. So with the help of this mediator or Jume Mode Chip the mobiles or smartphones or tablets can interact with two different variants of Bluetooth technology. As an example you can consider that a headphone which will have a classical variant of Bluetooth technology and some another device which will have newest version of Bluetooth technology that is BLE and these two wants to communicate with a smartphone. So that Jume Mode Chip is to be available in smartphone or tablets with the help of that it can interact with the classical variant of Bluetooth technology as well as newest variant of the Bluetooth technology. Now next we will see profiles and protocols used in Bluetooth technology. Protocols are the layer that allows data to be sent effectively between peers and implement the different packet formats, routing, multiplexing, encoding and decoding. So basically protocols are to be used for these purposes that is routing, multiplexing, encoding as well as decoding. Notice how protocols should be used to achieve a particular goal is to be defined by profile. So generally profiles are to be used for the use of protocols or how differently those protocols can be used. Now we will see different type of profiles. First one is generic profile. In case of generic profile a subheading is generic axis profile. So this profile is mandatory for all BLE devices that is Bluetooth low energy. It will cover define roles, procedures, discover devices, establish connections, usage model of the low level radio protocols and modes that allows devices to broadcast data. So generally generic axis profile is to be used for discovering the devices, establishing the connection between two devices, usage model of the low level radio protocols as well as modes that allows devices to broadcast data for slaves from the master. Another generic profile is generic attribute profile as we have seen this in the block diagram of Bluetooth technology. While performing data exchange in BLE that is Bluetooth low energy GATT that is generic attribute profile defines a basic data model and procedures to allow devices to discover, read, write and push data elements between them. This is the topmost data layer of Bluetooth low energy. Another category of profile is use case specific profiles. In that first one is find me profile. So one device can recognize another device with the help of find me profile, proximity profile. So one device can detect another device with the help of proximity profile. Third one is HID over GATT profile. So HID data is to be sent over BLE with the help of this HIDD over GATT profile. Next one is glucose profile. So glucose data is to be sent over BLE with the help of this profile. Next health thermometer profile. So body temperature of a particular person is to be sent over BLE with the help of health thermometer profile. Next one is cycling speed and cadence profile. So a sensor is to be attached with bicycle and that sensor will send bicycle speed as well as cadence data over Bluetooth with the help of this profile. So these are the profiles which are to be used in Bluetooth low energy module or variant of Bluetooth technology. And with the help of these profiles data is to be sent or receive between any two devices which are to be used. While preparing this video lecture I have used Internet of Things Architecture and Design Principle by Raj Kamal. Thank you.