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Bluetooth profile is a wireless communication interface that connects Bluetooth devices. The profiles define requirements for implementing of Bluetooth for various applications, such as, file transfer, wireless headset usage, etc.  The following figure depicts different Bluetooth profiles and their usage.   Serial Port Profile (SPP) is probably the most popular profile used in smart phone based ubiquitous and home automation systems. SPP emulates RS-232 based communication protocols including all the control signals. It is based on ETSI 07, 10 and the RFCOMM protocol (Read more).  RFCOMM is a simple set of transport protocol used for serial port emulation. It supports up to sixty emulated serial links on a single Bluetooth enable device. The emulated serial ports can again multiplexed through single point-to-point connection or point-to-multipoint connection piconet through several Asynchronous Connection-Oriented Logical transport (ACL) links. The flow control mechanis...

  Android 4.4.1 landing soon and fixes Nexus 5 camera . The Nexus 5 from Google is quite an awesome device, however its camera isn’t the greatest. Even though the Nexus 5 ′s camera features a optical image stabilization, taking shots from it are painfully slow and generally out-of-focus. Google is aware of this and as per The Verge, a new update scheduled to be released in the next few days fixes a lot of issues with the Nexus 5 camera. They’ve managed to get a hands-on experience with Android 4.4.1 and here is what they have to say: Speed is a theme for the update, and the Nexus 5 ′s camera really does feel faster across the board. The app launches a full second quicker than it did before the update, meaning you’ll miss many fewer shots than before. There’s also a new progress indicator in HDR+ mode, which makes the process, longer by necessity, feel a lot more straightforward. It’s the first of what Burke says will be a series of interface changes, as Google tries to make Andro...

Another piece of Google's voice search puzzle fell into place on Tuesday as the search giant announced that Android users will now be able to voice search on their smartphones by relationship terms in addition to name searches. The update, as described by Google, will bring up any contact you've designated as having a particular familial connection to you in the "relationship" field in your contacts tool on Android. This additional functionality is meant to allow a user to now speak a phrase such as "call mom," or "text sister" to initiate those actions without the user needing to say the person's name as it's listed in their contacts. In order to launch contacts on your Android handset via voice you first need to allow the Google search app to access your contacts and the profile information attached to each person or place. However, during repeated testing of the update on a Moto G handset running Android 4.4.2, we were unable to get the ...

Does the world really need yet another digital camera? The correct answer would be an unequivocal and resounding, “Yes!”. Well, you know that the camera industry is going to continue moving forward with ever higher resolution, not to mention advancements in video recording technology, but how about the operating system of the camera? That has more often than not been overlooked, so Samsung might be on to something here with their maiden attempt at an Android-powered camera, the Samsung Galaxy Camera. Yes sir, we are referring to the mobile operating system from Google that sees actions on smartphones and tablets, now making its way to a camera. How does it fare? Hit the extended post to know more. The Samsung Galaxy Camera can be said to be a smartphone sans the “phone” bit. After all, it will come with the most recent Android 4.1 Jelly Bean operating system, not to mention carry a slew of connectivity options that would even turn some smartphones green with envy – such as 3G, 4G and W...