android lcd module with bluetooth free sample

This practical project guide will take you through the steps needed to build a 16×2 LCD (Liquid Crystal Display) module with an Arduino Uno board using a Bluetooth connection to an Android device.

These components are cheap to produce and are available almost anywhere online. Usually you can find them with a green or blue backlight and should ship with a 16 pin header.

As you can see from the images above, I have soldered the header pins on to the front of the module as it gives me easier access for prototyping projects.

If this LCD was destined to be built in to a more permanent project then I would have placed the pins facing out of the back of the module to create a cleaner look.

Potentiometer. Various types, sizes and values will work for this project however I use the 10K Preset Pot here. This is used to adjust the backlight of the LCD module to your preferred contrast for better lighting.

To follow along with this tutorial you will need to either:Build the Bluetooth module with supporting components such as resistors and jumper/hook-up wire using the solder method

Make sure that the Bluetooth module is not connected to the Arduino as this may cause problems with the sketch upload. (The TX pin on the Bluetooth module to RX on the Arduino will need disconnecting for the duration of the software write.)

For this reason I will provide a compatibility note below. Please check that your Android App version that you have installed is compatible with the Arduino Sketch provided here.

The following image shows the wiring diagram of how to connect your project together. Once this is complete we need to power the Arduino with the USB cable to a PC/laptop or you can use another source of power if you wish.

The Arduino LCD Playground App utilizes the ‘LiquidCrystal’ library supplied by the Arduino team to provide an interactive learning environment and make prototyping more efficient.

I have supplied various methods below in which to install the Android app by either:Scanning the QR code using your Android device. This will prompt you to install the app directly from me

If you are installing the app directly from me then you may need to change a setting on your android device which allows you to ‘install apps from other sources’.

We may need to scan for nearby Bluetooth devices. If you are using the HC-06 Bluetooth module then you should see this displayed on Android as “HC-06“.

Click the Bluetooth icon as shown in the image below and select your Bluetooth module which should be displayed in the list as “HC-06” along with it’s MAC address.

From here you can tap the squares to create your character. Once you are happy with the character you will need to give it a name then hit the “Save” button. Now we can navigate back to the main screen.

This instructional guide was intended for anyone wanting to control an LCD module display on an Arduino Uno by using an Android app over Bluetooth communication.

I hope that not only will beginner’s find this project useful but anyone simply wanting a little fun with LCD’s from the comfort of a graphical interface.

Control your electronic project with an Android device. This app communicates using Bluetooth to an HC-06 or HC-05 Bluetooth module in your project. This app comes with a library containing 11 Bluetooth examples for Arduino. It can also be used with Raspberry Pi or any other rapid prototyping system in which you have included a suitable Bluetooth module to your project.

Some electronics skills required. Requires an Android device with Bluetooth capability enabled. Version 1.1 only works with Bluetooth Classic. Version 1.2 supports Bluetooth Low Energy and USB connectivity in addition to Bluetooth Classic.

Finally, You undertake any electronic project at your own risk. Please be careful. Consider what is going to happen to your project if the Bluetooth connection is lost, or the Android device crashes.

Bluetooth is one of the most popular and easy to use wireless technology. Over the few years there have been many upgrades of Bluetooth standard to keep pace with the current ongoing technology with future technology and to satisfy needs of users. Starting from the Bluetooth version 1.0 to Bluetooth version 5.0, there are many things changed including higher data rates, the ability to be used for IoT with low current consumption, improved security, etc. To learn Bluetooth communication there are many modules available which can be interfaced with microcontrollers. Such a Bluetooth module is HM10 which is based on Bluetooth 4.0.

The HM10 is a serial BLE module (Bluetooth-Low-Energy) which is intended to use for the low power consumption applications and can last long even with a coin-sized battery. The HM10 is a Bluetooth 4.0 modulebased on the Texas Instruments CC2540 or CC2541 BLE System SoC (System on Chip). The firmware and design of the module is made and managed by Jinan Huamao Technology. The module comes with serial/UART layer which makes the device to be able to interface with different microcontrollers. The HM10 is ideal for creating simple connections and using it with or as an iBeacon.

The HM10 has become a very popular Bluetooth 4.0 BLE module. The HM10 is a Bluetooth 4.0 based module only, so it will not connect with Bluetooth 2/2.1 module such as HC-05, HC-06 and other Bluetooth modules. The HM10 is controlled via AT commands sent over the serial UART connection. HM-10 is a Bluetooth Low Energy (BLE) module, to know more about BLE follow the link. Also learn how an nRF24L01 module can be used as BLE module with Arduino.

The major difference HM10 possess is the Bluetooth Version. The HM10 is Bluetooth 4.0 module, so it comes with all Bluetooth Version 4.0 features such as speed, throughput and range. The HM10 offers a data rate of up to 24 Mbps with low-energy/low-power consumption. Along with this the HM10 offers a distance range of 100 meters in open space. Compare to other Bluetooth modules such as HC-05 which is a Bluetooth 2.0 based module, the HM10 certainly performs better than the HC-05. The HC-05 only offers 3 Mbps compared to HM10 which is quite less.

Bluetooth module HC-05 and HC-06 are still very popular among makers and hobbyists as they are cheap and easy to interface. We also made many projects using HC-05/06 and interfaced them with many other microcontrollers:

Today we will interface HM-10 BLE Module with Arduino Uno to control an LED wirelessly using Bluetooth protocol. The On/Off commands will be sent by Smartphone.

Before starting with the project make sure that your HM-10 module is a genuine HM-10 module. There are widely Chinese cloned HM-10 modules available. To identify the difference between Genuine and Cloned HM-10 module, just look the presence of Crystal Oscillator of 32KHz on the HM-10 Board. If the Crystal Oscillator is present then it is a genuine HM-10 Module and you don’t need to change the Firmware. But if you cannot see the Crystal Oscillator in place of it then it is a Cloned HM10 module and you need to change the Firmware of the Cloned HM-10 Module. Without changing the HM-10 firmware, you can neither access the HM-10 module with AT commands nor you can pair it with smartphones. Here we are also using the clone module so we flashed its firmware before connecting it with Ardruino. In order to change the Firmware of Cloned HM-10 module, simply follow our tutorial on How to change or flash the Firmware of Clone HM-10 module.

The Arduino Bluetooth Controller (HM-10 Module) is an android application which is available free on Google Play Store. This app is having easy and simple interface for HM-10 BLE Module. While testing, it was able to find HM-10 quickly and it connected instantly with HM-10. The app has some cool feature like you can create a button and customize it with custom name and functions. Here we will how to create two buttons in this Bluetooth controller app to turn on and off the LED connected with Arduino.

The Home page of the app will look like below where you can find features like, connect Device, Search Icon, Delete Icon, Device Status, Send Text, Add Template etc. Start with searching the Device either by clicking on Search Icon or by clicking to three dotson the upper right corner and choose connect Device.

This finishes the setting up android app to control the HM-10 module. Now we will start with the programming Arduino Uno to get the characters from Android App.

As always complete program with demonstration video can be found at the end of this tutorial. Programming Arduino UNO for this project neither requires much effort nor any library. You can use hardware serial and software serial library. If you are using software serial then just include software serial library else proceed with hardware serial. In this project we are using SoftwareSerial. So start with including Software Serial Library. The pins Rx and Tx are connected at 2 and 3 Pins of Arduino.

If the received string is “F” then print a message on serial monitor and turn OFF the led else if the received string is “N” then print a message on serial monitor and Blink led with a delay of 500ms.

This finishes the complete tutorial on how to control LED using Arduino and BLE HM10 Blutooth 4.0 module. Again remember that, if you have a genuine HM10 module then you don’t need to flash its firmware, it can be used straight away. But If you are using a cloned HM-10 module then flash the firmware on clone HM10 BLE module. If you have any doubt or suggestion then please comment below or write to our forum.

At present, the mainstream interaction mode can be divided into Android and Windows according to system type, and can be divided into tablet integrated mode and chassis mode according to form.

Proculus Tech has common advantages in Android industrial tablets, and has been widely used in industrial, medical, chemical, smart-home, manufacturing and other work areas by users. Today, Proculus smart industrial tablets are widely known in business. Coupled with the growing need for smart shopping malls, Android industrial tablets can be better connected to mobile terminals, and its advantages will gradually emerge. This will also bring great convenience and practicality for the intelligent management of the industrial site.

In this Arduino Bluetooth Tutorial we will learn how use the HC-05 module for controlling Arduino via Bluetooth communication. You can watch the following video or read the written tutorial below for more details.

For this tutorial I made two example, controlling the Arduino using a smartphone and controlling the Arduino using a laptop or a PC. In order not to overload this tutorial, in my next tutorial we will learn how we can configure the HC-05 Bluetooth module and make a Bluetooth communication between two separate Arduino Boards as master and slave devices.

Before we start with the first example, controlling an Arduino using a smartphone, let’s take a closer look at the HC-05 Bluetooth module. Comparing it to the HC-06 module, which can only be set as a Slave, the HC-05 can be set as Master as well which enables making a communication between two separate Arduino Boards. There are several different versions of this this module but I recommend the one that comes on a breakout board because in that way it’s much easier to be connected. The HC-05 module is a Bluetooth SPP (Serial Port Protocol) module, which means it communicates with the Arduino via the Serial Communication.

The particular module that I have can be powered from 3.6 to 6 volts, because it comes on breakout board which contains a voltage regulator. However, the logic voltage level of the data pins is 3.3V. So, the line between the Arduino TX (Transmit Pin, which has 5V output) and the Bluetooth module RX (Receive Pin, which supports only 3.3V) needs to be connected through a voltage divider in order not to burn the module. On the other hand, the line between the Bluetooth module TX pin and the Arduino RX pin can be connected directly because the 3.3V signal from the Bluetooth module is enough to be accepted as a high logic at the Arduino Board.

Description:First we need to define the pin to which our LED will be connected and a variable in which we will store the data coming from the smartphone. In the setup section we need to define the LED pin as output and set it low right away. As mention previously, we will use the serial communication so we need to begin the serial communication at 38400 baud rate, which is the default baud rate of the Bluetooth module. In the loop section with the Serial.available() function we will check whether there is available data in the serial port to be read. This means that when we will send data to the Bluetooth module this statement will be true so then using the Serial.read() function we will read that data and put it into the “state” variable. So if the Arduino receive the character ‘0’ it will turn the LED off and using the Serial.println() function it will send back to the smartphone, via the serial port, the String “LED: OFF”. Additionally we will reset the “state” variable to 0 so that the two above lines will be executed only once. Note here that the “state” variable is integer, so when we receive the character ‘0’ that comes from smartphone, the actual value of the integer “state” variable is 48, which corresponds to character ‘0’, according to the ASCII table.. That’s why in the “if” statement we are comparing the “state” variable to a character ‘0’. On the other hand, if the received character is ‘1’, the LED will light up and the String “LED: ON” will be sent back.

Now we are ready to connect the smartphone to the Bluetooth module and the Arduino. What we need to do here is to activate the Bluetooth and the smartphone will find the HC-05 Bluetooth module.

Then we need to pair the devices and the default password of the HC-05 module is 1234. After we have paired the devices we need an application for controlling the Arduino. There are many application in the Play Store for this purpose which will work with the Arduino code that we wrote. However, I made my own custom application for this tutorial using the MIT App Inventor online application. This is a great and easy to use application for building Android application and in my next tutorial you can find a detailed step by step guide how to build your own custom Android application for your Arduino Project.

With the connect button we will connect the smartphone to the Bluetooth module and the status text below the button will tell us whether we have successfully connected. Using the “Turn ON” and “Turn OFF” buttons we can turn on and off the LED. The text above the buttons is the one that the Arduino is sending back to the smartphone when a particular button is pressed.

Let’s see how we can control the Arduino via Bluetooth using a Laptop or a PC. So, first we need to pair our laptop to the HC-05 Bluetooth module and we can do that from the Laptop Bluetooth Settings. The laptop will discover the HC-05 module and using the ‘1234’ password we will pair the devices.

Once we will pair the devices in the Laptop Device Manager, under Ports (COM & LPT), two new entities will appear named “Standard Serial over Bluetooth link”. From here we can see the COM Port number of the serial port through which the devices will communicate.

We will stick with the same example as previously, turning on and off a LED and sending back a string to the laptop, so we will use the same Arduino code as previously described.

Now the program is ready, so when we will click the run button, the program will automatically activate the Bluetooth communication between the laptop and the Arduino. The HC-05 Bluetooth module will start to flash every two seconds, which indicates that the module is connect and we will be able to control the LED using our Laptop.

Thant’s all for this tutorial, but don’t forget to check my next tutorial where we will learn how we can configure the HC-05 Bluetooth module and make a Bluetooth communication between two separate Arduino Boards as master and slave devices.

The ESP32 comes with Wi-Fi, Bluetooth Low Energy and Bluetooth Classic. In this tutorial, you’ll learn how to use ESP32 Bluetooth Classic with Arduino IDE to exchange data between an ESP32 and an Android smartphone.

At the moment, using Bluetooth Classic is much more simpler than Bluetooth Low Energy. If you’ve already programmed an Arduino with a Bluetooth module like the HC-06, this is very similar. It uses the standard serial protocol and functions.

In this tutorial, we’ll start by using an example that comes with the Arduino IDE. Then, we’ll build a simple project to exchange data between the ESP32 and your Android smartphone.

Initialize the Bluetooth serial device and pass as an argument the Bluetooth Device name. By default it’s called ESP32test but you can rename it and give it a unique name.

In the first if statement, we check if there are bytes being received in the serial port. If there are, send that information via Bluetooth to the connected device.

The next if statement, checks if there are bytes available to read in the Bluetooth Serial port. If there are, we’ll write those bytes in the Serial Monitor.

Click the settings icon, and select Pair new device. You should get a list with the available Bluetooth devices, including the ESP32test. Pair with the ESP32test.

Now that you know how to exchange data using Bluetooth Serial, you can modify the previous sketch to make something useful. For example, control the ESP32 outputs when you receive a certain message, or send data to your smartphone like sensor readings.

Through the Android app, we’ll send messages to control an ESP32 output. When the ESP32 receives the led_on message, we’ll turn the GPIO on, when it receives the led_off message, we’ll turn the GPIO off.

To work with the DS18B20 temperature sensor, you need to install the One Wire library by Paul Stoffregen and the Dallas Temperature library. Follow the next instructions to install these libraries, if you haven’t already.

Start by including the necessary libraries. The BluetoothSerial library for Bluetooth, and the OneWire and DallasTemperature for the DS18B20 temperature sensor.

Upload the previous sketch to your ESP32 board. Then, open the Serial Monitor, and press the ESP32 Enable button. When you receive the following message, you can go to your smartphone and connect with the ESP32.

The application has several buttons in which you can save default messages. For example, you can associate M1with the “led_on” message, and M2with the “led_off” message.

We hope you’ve found this tutorial useful. For more projects with the ESP32 you can check our project’s compilation: 20+ ESP32 Projects and Tutorials.

This tutorial is a preview of the “Learn ESP32 with Arduino IDE” course. If you like this project, make sure you take a look at the ESP32 course page where we cover this and a lot more topics with the ESP32.

Before you check for these issues, make sure you have an Android phone running Android 8.0 (Oreo) and up, with a data plan. For best performance, we recommend the latest version of Android. Follow the instructions to check your version.

Starting with Android 10, Android Auto is built into the phone as a technology that enables your phone to connect to your car display. This means you no longer have to install a separate app from the Play Store to use Android Auto with your car display.

To use Android Auto on your car display, your car needs to be compatible with Android Auto or have an aftermarket unit installed. Android Auto won"t work on all cars equipped with a USB port. See this list of manufacturers to check if your car is compatible.

Cables from independent manufacturers can be a good choice if they meet standards of the USB Implementers Forum. If you want to buy a cable, you can check if it has been certified within the past two years. To find the cable, filter the list for the model number or brand.

In order to use Bluetooth, a device must be compatible with the subset of Bluetooth profiles (often called services or functions) necessary to use the desired services. A Bluetooth profile is a specification regarding an aspect of Bluetooth-based wireless communication between devices. It resides on top of the Bluetooth Core Specification and (optionally) additional protocols. While the profile may use certain features of the core specification, specific versions of profiles are rarely tied to specific versions of the core specification, making them independent of each other. For example, there are Hands-Free Profile (HFP) 1.5 implementations using both Bluetooth 2.0 and Bluetooth 1.2 core specifications.

The way a device uses Bluetooth depends on its profile capabilities. The profiles provide standards that manufacturers follow to allow devices to use Bluetooth in the intended manner. For the Bluetooth Low Energy stack, according to Bluetooth 4.0 a special set of profiles applies.

A host Operating System can expose a basic set of profiles (namely OBEX, HID and Audio Sink) and manufacturers can add additional profiles to its driver and stack to enhance what their Bluetooth device can do.

Specific parts of the Bluetooth protocol stack used by the profile. To perform its task, each profile uses particular options and parameters at each layer of the stack. This may include an outline of the required service record, if appropriate.

This profile defines how multimedia audio can be streamed from one device to another over a Bluetooth connection (it is also called Bluetooth Audio Streaming). For example, music can be streamed from a mobile phone to a wireless headset, hearing aid/cochlear implant streamer, or car audio; alternately from a laptop/desktop to a wireless headset; also, voice can be streamed from a microphone device to a recorder on a PC.Headset (HSP) or Hands-Free (HFP) profiles for telephone calls, which may be used separately.

Each A2DP service, of possibly many, is designed to uni-directionally transfer an audio stream in up to 2 channel stereo, either to or from the Bluetooth host.AVDTP and GAVDP. It includes mandatory support for the low-complexity SBC codec (not to be confused with Bluetooth"s voice-signal codecs such as CVSDM), and supports optionally MPEG-1 Part 3/MPEG-2 Part 3 (MP2 and MP3), MPEG-2 Part 7/MPEG-4 Part 3 (AAC and HE-AAC), and ATRAC, and is extensible to support manufacturer-defined codecs, such as aptX.Bluetooth​ and Bluetooth lossless.

While designed for a one-way audio transfer - CSR has developed a way to transfer a mono stream back (and enable using headsets with microphones), and incorporated it into FastStream and aptX Low Latency codecs. The patent has expired.

Some Bluetooth stacks enforce the SCMS-T digital rights management (DRM) scheme. In these cases, it is impossible to connect certain A2DP headphones for high quality audio, while some vendors disable the A2DP functionality altogether to avoid devices rejecting A2DP sink.

This profile is designed to provide a standard interface to control TVs, Hi-fi equipment, etc. to allow a single remote control (or other device) to control all of the A/V equipment to which a user has access. It may be used in concert with A2DP or VDP.

Allows the automatic backup of all the new images from a target device. For example, a laptop could download all of the new pictures from a camera whenever it is within range.

Allows the initiator to remotely use a digital camera. For example, a user could place a camera on a tripod for a group photo, use their phone handset to check that everyone is in frame, and activate the shutter with the user in the photo.

This allows devices to send text, e-mails, vCards, or other items to printers based on print jobs. It differs from HCRP in that it needs no printer-specific drivers. This makes it more suitable for embedded devices such as mobile phones and digital cameras which cannot easily be updated with drivers dependent upon printer vendors.

This is designed for cordless phones to work using Bluetooth. It is hoped that mobile phones could use a Bluetooth CTP gateway connected to a landline when within the home, and the mobile phone network when out of range. It is central to the Bluetooth SIG"s "3-in-1 phone" use case.

This profile allows a device to be identified above and beyond the limitations of the Device Class already available in Bluetooth. It enables identification of the manufacturer, product id, product version, and the version of the Device ID specification being met. It is useful in allowing a PC to identify a connecting device and download appropriate drivers. It enables similar applications to those the Plug-and-play specification allows.

In PC-to-PC usage models (such as conference table and file transfer), a PC may use this information to supplement information from other Bluetooth specifications to identify the right device to communicate with.

In PC to peripheral usage models (such as dial up networking using a cellular phone), the PC may need to download device drivers or other software for that peripheral from a web site. To do this the driver must know the proper identity of the peripheral. Note that devices are expected to provide some basic functionality using only the Bluetooth profile implementation, and that additional software loaded using the Device ID information should only be necessary for extended or proprietary features. Likewise, devices which access a profile in another device are expected to be able provide the basic services of the profile regardless of the presence or absence of Device ID information.

This profile provides a standard to access the Internet and other dial-up services over Bluetooth. The most common scenario is accessing the Internet from a laptop by dialing up on a mobile phone, wirelessly. It is based on Serial Port Profile (SPP), and provides for relatively easy conversion of existing products, through the many features that it has in common with the existing wired serial protocols for the same task. These include the AT command set specified in European Telecommunications Standards Institute (ETSI) 07.07, and Point-to-Point Protocol (PPP).

This profile is intended to provide a well-defined interface between a mobile phone or fixed-line phone and a PC with Fax software installed. Support must be provided for ITU T.31 and / or ITU T.32 AT command sets as defined by ITU-T. Data and voice calls are not covered by this profile.

The Baseband, LMP, L2CAP, and SDP are Bluetooth protocols defined in the Bluetooth Core specifications. AVDTP consists of a signaling entity for negotiation of streaming parameters and a transport entity that handles the streaming.

Provides profile discovery and description services for Bluetooth Low Energy protocol. It defines how ATT attributes are grouped together into sets to form services.

Profile designed to facilitate transmission and reception of Medical Device data. The APIs of this layer interact with the lower level Multi-Channel Adaptation Protocol (MCAP layer), but also perform SDP behavior to connect to remote HDP devices. Also makes use of the Device ID Profile (DIP).

This profile is used to allow car hands-free kits to communicate with mobile phones in the car. It commonly uses Synchronous Connection Oriented link (SCO) to carry a monaural audio channel with continuously variable slope delta modulation or pulse-code modulation, and with logarithmic a-law or μ-law quantization. Version 1.6 adds optional support for wide band speech with the mSBC codec, a 16 kHz monaural configuration of the SBC codec mandated by the A2DP profile. Version 1.7 adds indicator support to report such things as headset battery level.

In 2002 Audi, with the Audi A8, was the first motor vehicle manufacturer to install Bluetooth technology in a car, enabling the passenger to use a wireless in-car phone. The following year DaimlerChrysler and Acura introduced Bluetooth technology integration with the audio system as a standard feature in the third-generation Acura TL in a system dubbed HandsFree Link (HFL). Later, BMW added it as an option on its 1 Series, 3 Series, 5 Series, 7 Series and X5 vehicles. Since then, other manufacturers have followed suit, with many vehicles, including the Toyota Prius (since 2004), 2007 Toyota Camry, 2006 Infiniti G35, and the Lexus LS 430 (since 2004). Several Nissan models (Versa, X-Trail) include a built-in Bluetooth for the Technology option. Volvo started introducing support in some vehicles in 2007, and as of 2009 all Bluetooth-enabled vehicles support HFP.

Many Car Audio Consumer Electronics manufacturers like Kenwood, JVC, Sony, Pioneer and Alpine build car audio receivers that house Bluetooth modules all supporting various HFP versions.

Bluetooth car kits allow users with Bluetooth-equipped cell phones to make use of some of the phone"s features, such as making calls, while the phone itself can be left in the user"s pocket or hand bag. Companies like Visteon Corp., Peiker acustic, RAYTEL, Parrot SA, Novero, Dension, S1NN and Motorola manufacture Bluetooth hands-free car kits for well-known brand car manufacturers.

Most Bluetooth headsets implement both Hands-Free Profile and Headset Profile, because of the extra features in HFP for use with a mobile phone, such as last number redial, call waiting and voice dialing.

Provides support for devices such as mice, joysticks, keyboards, and simple buttons and indicators on other types of devices. It is designed to provide a low latency link, with low power requirements. PlayStation 3 controllers and Wii remotes also use Bluetooth HID.

Bluetooth HID is a lightweight wrapper of the human interface device protocol defined for USB. The use of the HID protocol simplifies host implementation (ex: support by operating systems) by enabling the re-use of some of the existing support for USB HID to also support Bluetooth HID.

This is the most commonly used profile, providing support for the popular Bluetooth headsets to be used with mobile phones and gaming consoles. It relies on SCO audio encoded in 64 kbit/s CVSD or PCM and a subset of AT commands from GSM 07.07 for minimal controls including the ability to ring, answer a call, hang up and adjust the volume.

iAP and later iAPv2 protocol are proprietary protocols developed by Apple Inc. for communication with 3rd party accessories for iPhones, iPods and iPads. Most bluetooth drivers and stacks for Windows don"t support the iAP profile since using such protocols requires a MFi license from Apple and thus is displayed as "Bluetooth Peripheral Device" or "Not Supported Bluetooth Function" in Device Manager.

This is often referred to as the walkie-talkie profile. It is another TCS based profile, relying on SCO to carry the audio. It is proposed to allow voice calls between two Bluetooth capable handsets, over Bluetooth.

LAN Access profile makes it possible for a Bluetooth device to access LAN, WAN or Internet via another device that has a physical connection to the network. It uses PPP over RFCOMM to establish connections. LAP also allows the device to join an ad-hoc Bluetooth network.

OPP uses the APIs of OBEX profile and the OBEX operations which are used in OPP are connect, disconnect, put, get and abort. By using these API the OPP layer will reside over OBEX and hence follow the specifications of the Bluetooth stack.

The Proximity profile (PXP) enables proximity monitoring between two devices. This feature is especially useful for unlocking devices such as a PC when a connected Bluetooth smartphone is nearby.

SDAP describes how an application should use SDP to discover services on a remote device. SDAP requires that any application be able to find out what services are available on any Bluetooth enabled device it connects to.

This profile allows devices such as car phones with built-in GSM transceivers to connect to a SIM card in a Bluetooth enabled phone, thus the car phone itself doesn"t require a separate SIM card and the car external antenna can be used.Bluetooth SIG. Information on phones that support SAP can be found below:

all models with Bluetooth hands free PREMIUM; from ModelYear 2011 this module in those cars have additional HFP protocol, this give the option to support mobiles with SAP functionality - minimal functionality only use of Car Speaker and Microphone .

Many manufacturers of GSM based mobile phones offer support for SAP/rSAP. It is supported by the Android, Maemo, and MeeGo phone OSs. Neither Apple"s iOS nor Microsoft"s Windows Phone support rSAP; both use PBAP for Bluetooth cellphone-automobile integration.

Ameo, MDA Mail, MDA Pro, MDA touch, MDA touch plus, MDA Compact V, MDA Compact II, MDA Vario V, MDA Vario IV, MDA Vario III, MDA Vario II and I (only with newest Firmware)

GT-S5250 (Wave 525), GT-S5330 (Wave 533), GT-S5780 (Wave 578), GT-S7230 (Wave 723), GT-S7250 (Wave M), GT-S5380 (Wave Y), GT-S8500 (Wave, with limitations

This profile allows synchronization of Personal Information Manager (PIM) items. As this profile originated as part of the infrared specifications but has been adopted by the Bluetooth SIG to form part of the main Bluetooth specification, it is also commonly referred to as IrMC Synchronization.

For Bluetooth, Synchronization is one of the most important areas. The Bluetooth specifications up to, and including 1.1, has Synchronization Profile that is based on IrMC. Later, many of the companies in the Bluetooth SIG already had proprietary synchronization solutions and they did not want to implement IrMC -based synchronization also, hence SyncML emerged. SyncML is an open industry initiative for common data synchronization protocol. The SyncML protocol has been developed by some of the leading companies in their sectors, Lotus, Motorola, Ericsson, Matsushita Communication Industrial Co., Nokia, IBM, Palm Inc., Psion and Starfish Software; together with over 600 SyncML Supporter companies. SyncML is a synchronization protocol that can be used by devices to communicate the changes that have taken place in the data that is stored within them. However, SyncML is capable of delivering more than just basic synchronization; it is extensible, providing powerful commands to allow searching and execution.

Tempow Audio Profile (TAP): this new audio profile was presented at Bluetooth World 2017 in Santa Clara. It enables new audio functions, upgrading current A2DP profile.

Hi, today i am going to make a android app for arduino Bluetooth module HC-06.Through this app you can control a light or led form your android phone.Lets do it..........

In the menu bar go to “Projects”.Click on it.You will see a drop down menu.In that drop down menu click on the “Start new project”.Then a page will came and want a project name.Give a project name.I give the project name "Bluetooth_Remot".Remember in this online editor you are not allow to give space in the name.So, i use this "_" .

From "Blocks" to "Screen1" to "BluetoothClient1" click it and you will get boxes like the picture.Drag "BluetoothClient1 . AddressesAndNames" into "set ListPicker1 . Elements to".

Congratulation !!!!!!!!!!!!!!!! You just build your Bluetooth app.Now to download it go to top click on "Build" and then click on "App(save .apk to my computer)".

I know this is an old post, but I figured out it was reading the individual ASCII characters. Replace the a=Serial.read(); with a=Serial.readString(); I didn"t even use the app part. I just used Bluetooth Terminal and sent the strings manually.ReplyUpvote

Do you know if it is possible to use App inventor to control two seperate bluetooth devices? For example I would like to turn one light on with one button, and another light on (with another bluetooth receiver) with a separate button. Thanks!0

Can some one please explain, because if i remember correctly we can"t do that in C programming, or is it the differences between coding in arduino IDE vs with C IDE.

I"ve excluded a problem with the BT Module or the Android application because if in Arduino I implement an "ECHO" code (write in Android and the send in Android) everything works fine.

With the Arduino code posted below the expected behaviour is: Arduino reset-> Hello word sent, Serial monitor opened-> nothing happens, character written on serial monitor-> character received on BT, character written on BT-> character received on Serial Monitor, Serial monitor closed-> nothing happens.