Esp32 bluetooth android

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• O firmware possibilita a conexão e a reconexão com app, isso pode se Bluetooth® Overview. ESP32 Bluetooth Low Energy Tracker Hub ¶. The Esp32 is a powerful board with 2 cores, 520K RAM, 34 GPIO, 3 UART, Wifi and Bluetooth Dual Mode. You can now go to "File" -> "Examples" -> "ESP32 BLE Mouse" and select any of the examples to get started. Once connected, it will display the list of services and its characteristics. Provisioning library provides a mechanism to send network credentials and/or custom data to ESP32 (or its variants like S2, S3, C3, etc. Apr 1, 2024 · Click on the ‘scan’ icon on the top right corner. • Terminal: Send and receive text and voice commands over Bluetooth. It is based on the iBeacon example from the ESP32_BLE_Arduino library with the following changes : Uses ESP. 0. TESTING; kita akan mencoba menyambungkan bluetooth ESP32 dengan smartphone. You should see a list of devices you’ve previously paired with. Connect to your ESP32 if it was found. Click on it and add it to the pair device. Relies on NimBLE-Arduino. Ссылка на код урока . CONTINUE READING ». Nov 9, 2021 · One char being one byte, of course. Après avoir trouvé la carte Micro:bit, Cliquer sur le bouton ‘Stop’. Once the ESP32 can send commands to the lamp, You can probably skip the sniffer if the app is on an android phone: you can probably Jul 3, 2023 · Smartphone App with ESP32. You can move your car in three different modes. For eg. Now tap on this device and click on pair to pair the ESP32 with our smartphone. Appuyer sur le nom de la carte ESP32. Youtube explanation is available (see below). You can just copy and code in Arduino as well. 种不同的技术：经典蓝⽛ (Classic Bluetooth) 和蓝⽛低功耗 (Bluetooth Low Energy)。 ESP32 ⽀持双模蓝⽛，即同时⽀持经典蓝⽛和蓝⽛低功耗。 从整体结构上，蓝⽛可分为控制器 (Controller) 和主机 (Host) 两⼤部分：控制器包括了 The BluFi for ESP32-C3 is a Wi-Fi network configuration function via Bluetooth channel. If the incoming data is ‘1’ then we turn on the LED and if it is ‘0’ we should turn off the LED. Anyway, click on the CONNECT button. Click the settings icon, then select Pair new device. Serial terminal connecting to ESP32: ESP32 scanning for Wi-Fi September 2022. You've communicated with your ESP32 using BlueTooth. Apr 27, 2023 · Bluetooth LE Link Layer Controller. 4 - working good as master but had some issues as slave for me) Jul 30, 2020 · Every tutorial or sample code is about how to send commands to the ESP32 via Bluetooth or pair an ESP32 with a bluetooth joystick, etc. I have some other ideas to improve the app, I will be adding other input fields to be able to send different types of data to it, but Jun 11, 2022 · 06-11-22 2820. py seems to run without error, and I can pair the machine running it to my Android phone. Notify. Dec 30, 2017 · How it works. Click on the icon in the top left corner and choose “Devices”. Then, open Serial Bluetooth Terminal application. When I tried to connect directly with mobile here is the pop-up I got. Apart from Wi-Fi which is one of the major features, ESP32 also supports Bluetooth as a dual-mode system. Terminal Serial Communication: provide send and receive text data both side real time. 6 esp platform, older 1. Tambahkan ESP32test pada menu bluetooth di settings HP. • Gamepad: Control Arduino projects/devices/robot in analog (Joystick), digital, and accelerometer mode. ESP32 Bluetooth Classic with Arduino IDE: Getting Started Guide. Make sure you to grant bluetooth May 26, 2024 · Bluetooth Classic and BLE Device Pairing is a secure process that enables two devices to communicate by establishing a trusted connection. In the Arduino IDE go to "Sketch" -> "Include Library" -> "Add . Then in the esp or arduino code, send the data via Serial. Open the app, go to "Android GamePad Tester" and complete the test of the components on the circuit. Here we have named Blynk-Test in the code. Dec 7, 2019 · 6. BLE examples between unity and esp32. According to the Espressif docs, the maximum throughput of Bluetooth LE communication between ESP32 boards can reach up to 700 Kbps, which is about 90 KB/s. Using this information, ESP32-C3 can then connect to an AP or establish a softAP. This slows down detection on your esp32 (which should be scanning continuously) but saves power on your mobile device. But for ESP32 I only found some documentations EspBlufi is based on the BLUFI protocol, which connect with IOT devices for BLE data communication, realizes device config network, and custom data transmission and reception. , ESP32 is used. Explained How to control LED by Bluetooth with Android App and ESP32 board. With Free-RTOS (with multicore), WiFi, BLE, plenty of GPIOs, peripherals support, etc. But my current speed should be fine already. Feb 19, 2021 · Bluetooth Classic. In this video we are going to make bluetooth car using ESP32 module which has inbuilt bluetooth. ESP32-S3 Bluetooth Stack Architecture. In this tutorial, we will explore how to use the Bluetooth Classic on ESP32 with Arduino IDE. – Amanoo. Depending on your use case you could advertise only every 10 seconds or even less. While ESP32 has separate stacks for WiFi and Bluetooth, they share a common radio Sep 12, 2022 · I'm trying to Connect directly esp32 BLE with mobile without the help of the Bluetooth serial Terminal app. To use the ESP32 in a robot, you will need to connect it to the robot’s hardware, such as motors, sensors, and other components. The BluFi for ESP32-C3 is a Wi-Fi network configuration function via Bluetooth channel. Remark: After installing the mobile application on your Smartphone, you must follow these steps to connect to the ESP32 card you must: Click on the ‘scan‘ button. – Michael Kotzjan. There will be a pop up menu to select the esp broadcast name. The table below shows whether the Bluetooth modules are supported in a The code will start executing and Turns ON the ESP32 Bluetooth Stack. Browse the GATT table and find the UUID and handle of the characteristic that controls the ESP32. These services can have different streams of data. Including serial API for external modules (similar to Adafruit EZKey HID) - asterics/esp32_mouse_keyboard Nov 16, 2023 · Web Bluetooth (also sometimes referred to as Web BLE) is a technology that allows you to connect and control BLE-enabled devices, like the ESP32, directly from your web browser using JavaScript. Working with BLE can be challenging when using libraries and drivers from The majority of the code implements a set of callbacks for the Bluetooth stack. May 27, 2021 at 8:03. I am still kind of a noob with android development and micro controllers. Esp-IDF is very good SDK, to developer Esp32 projects. Before I started this project, i compared several projects on the web. There are a few potential advantages of using bluetooth to connect to and control an embedded device. Step-By-Step Instructions To Connect The ESP32 To A Smartphone Over Bluetooth. ZIP Library" and select the file you just downloaded. Firstly, we will see a simple example to send En el siguiente video les muestro como cargar el ejemplo para probar la conexión bluetooth entre el ESP32 y un dispositivo Andriod, además de un pequeño ejem Aug 22, 2019 · ※iphone持ってないのでandroid前提です。ごめんなさい。 インストール後の設定も以下の通りとてもシンプルです。 スマホとESP32をペアリングする。androidの設定画面→[機器接続]→[新しい機器とペア設定する]→[ESP32（スケッチで設定したデバイス名）を選択する] May 10, 2019 · 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. Control your car wirelessly using the BTROBOT Android app or any compatible joystick app. Open your VS Code and head over to View > Command Palette. Para programar el ESP32 para que se comunique con un teléfono Android mediante el protocolo Bluetooth, debe configurar la biblioteca serial Bluetooth ESP32. The Bluetooth stack in ESP-IDF is a layered architecture that enables Bluetooth Jan 29, 2023 · About this app. Type ESP-IDF: New Project in the search bar and press enter. For demonstration, we will establish bidirectional data communication between the ESP32 and an Android cell phone over Bluetooth Classic. Jun 28, 2023 · I will use the Android application called “GamePad Tester” to view and test the Button and Joystick functions. Lets connect the ESP32 using Bluetooth. So, let’s go ahead and open this application. Create an object of class ‘BluetoothSerial’ and begin the communication using ‘begin ()’ function. We begin our program by adding the header file BluetoothSerial which makes the ESP32 Bluetooth to work as Bluetoth SSP. Lalu sambungkan ESP32 dengan laptop, tidak ada konfigurasi tambahan diperlukan di rangkaian. - willbeez/ESP32-WiFi-Bluetooth-Android ESP32-S3 supports Bluetooth 5. An adaptive universal ir remote control by using Bluetooth with ESP32 or Arduino Uno R3, Arduino IDE and Android app. The Bluetooth stack in ESP-IDF is a layered architecture that enables Bluetooth functionality on ESP32-S3 chip series. Apr 1, 2024 · The code is very simple. Wait for device connecting. Serial. When i go to pair another it says ‘An App is needed’ when trying to pair. begin(115200); pinMode (LED_BUILTIN, OUTPUT); digitalWrite(LED_BUILTIN, LOW); After that: Press the search button. In this article, I discuss Bluetooth Low Energy (BLE) and demonstrate its basic implementation structure on the ESP32. 07/03/2023. With Web BLE, you can create web applications that interact with your ESP32 devices via Bluetooth, enabling you to control GPIO pins, exchange data ESPs und Arduino habe ich ja schon oft gezeigt, was aber, wenn man diese mit einem Handy verbinden will? Dann spielt der ESP32 seine Bonuspunkte aus: Dieser We recommend using the Android app “Serial Bluetooth Terminal,” available in the Play Store. Step 1: Install ESP32 on the Arduino IDE. The devices then exchange a shared secret, known as a link key. You’ll learn how to use ESP32 Bluetooth Classic with Arduino IDE, and how to do all the main operations like (Bluetooth Pairing, Bluetooth Scanner, Send Data in Master Mode, and Receive Data in Slave Mode). Pair with ESP32. I should actually be able to reach faster speeds, according to Espressif. This example is designed to demonstrate the use of ESP32 Micropython together with Web Bluetooth. Let us look at a few examples in Arduino IDE in either Mar 21, 2021 · BLUETOOTH CLASSIC. Enable the Bluetooth. Once again, both protocols do it differently. Please make sure that your ESP32 has integrated Bluetooth. arrow_forward. Also, I would like to point out some parts of the code, like: // Bluetooth Serial object. The bluetooth-reading runs on a background thread. Now it you mobile will try to connect with ESP32 Bluetooth. Then the device can create various services that are seen by others when they connect to it. BluetoothSerial SerialBT; Mar 26, 2023 · Go to Devices. Arduino – Control 2 DC Motors Via Bluetooth (Perfect To Build a Robot) In this tutorial I’ll show you how to control 2 DC motors via bluetooth with an Android app created with MIT App Inventor 2. d effects the performance, but it does not drop it that much. I have trying to find examples for codes to exchange data over bluetooth between esp32 devkit module and an Android device. Button Control: Provide eight buttons, you can modify sending-data for each button to control your ESP32. Dec 27, 2023 · What Dabble has in store: • LED Brightness Control: Control brightness of LEDs. Oct 31, 2022 · La carte ESP32 peut être connectée à un smartphone via Bluetooth en implémentant une connexion Bluetooth à faible consommation d'énergie (BLE) entre les deux Jul 5, 2022 · The bluetooth connection between the esp32 and the phone should be made (paired) before the app can find and use it. Enfin Cliquer sur le bouton ‘connect’. that the phone is connected to. I will use the Android application called “GamePad Tester” to view and test the Button and Joystick functions. I'll use the codes of Neil Kolban. Step 3: Understand the Code. The line break will be detected in the app. We can use the app to send voice commands to the board, but also we can send written commands to it. Finally click on the ‘connect‘ button. You can pass the name of the ESP32 Bluetooth Device as an argument to the ‘begin ()’ function. ESP32 code is in bluetooth_android_esp32. Application examples. Press the name of the ESP32 board. I want to use SDP to broadcast a service and then make my Android app connect to esp socket as client. Then, choose Android bluetooth settings > ESP32test. - takashiski/UnityAndESP32_BLEExamples the need for an extra PC or other host devices running the Bluetooth Host. 6. Apr 28, 2023 · You should set the DelimiterByte property in the bluetooth component to 10. By using that gamepad you can control the Bluetooth car. 0. Step 5: Select the Device and Communicate. The variable "data" of the Android code is the received char-array. Click on ‘CONNECT’ and smart phone starts connection with ESP32 BLE Server. ESP32 is a series of low cost, low power system on a chip microcontrollers with integrated Wi-Fi and dual-mode Bluetooth. Apr 25, 2022 · Here is what I have so far and it does what I want it, it pulls a pin HIGH when there is a secure connection, and where there isn’t a connection it pulls the pin goes LOW. Here is ESP32 with Arduino IDE Step by step Programing. com/esp32-bluetooth-classic-arduino-ide/Enroll in "Learn ESP32 w Nov 2, 2022 · Après avoir installer l’application mobile sur votre Smartphone, il faut suivre ces étapes pour se connecter à la carte ESP32 il faut : Cliquer sur le bouton ‘scan’. This can also be used as a starting point/example for anyone trying to write custom Bluetooth protocols. Once connected it will show connected. Jan 11, 2023 · En este video les comento un poco acerca del funcionamiento de este Control Radar entre ESP32 con Arduino y Android Studio Kotlin y el mismo forma parte del Apr 18, 2016 · Now python server. Oct 31, 2023 · In this section, let’s create an ESP-IDF project to use Bluetooth Classic of ESP32. ESP32 Bluetooth Low Energy Tracker Hub. [中文] This document provides an architecture overview of the Bluetooth stack in ESP-IDF and some quick links to related documents and application examples. I have already have a app designed. This card can be May 28, 2021 · Download and install nRF Connect app from the play store. ESP32-BLEBeaconSpam. We’ll control an ESP32 output, and send sensor readings to an Android smartphone using Bluetooth Classic. 09. It doesnt allow to pair when going onto setting, connection and bluetooth. Step 2: Program ESP32 with the code below. In this tutorial we'll be building an Android app that connects to the ESP32 via Bluetooth to establish two-way communication. #Bluetooth_with_ESP32 #ESP3 Congratulations. Currently, Bluetooth Classic is considerably simpler to use compared to Jul 19, 2019 · I am trying to send a Time of Flight sensor (VL53L0X) data, which is integer through ESP32 board via bluetooth to the android app, that I am developing in Android Studio, but I am not able to connect to the board for some reason. It only shows the phone if I go into the Bluetooth menu and start a Scan from the phone. BluFi documentation. In that application, there is a gamepad. The esp32_ble_tracker component creates a global hub so that you can track bluetooth low energy devices using your ESP32 node. Oct 16, 2018 · The idea of the program is to initialise a Serial Bluetooth connection using ESP32 and listen for data from paired devices. This solution comprises of two parts, the ESP32 + OLED module and the Android app. Watch on. You can see the name Home Automation, I defined it in the programming. This is important as it will be used in Part B. Yes the Log. This library allows you to make the ESP32 act as a Bluetooth Gamepad and control what it does. Launch nRF Connect app and scan for devices. ) or ESP8266 devices. Has anybody experienced this problem? May 13, 2024 · This app can be used to establish wireless communication between our smartphone and the ESP32 microcontroller. This repository contains the source code for the companion Android app for this provisioning mechanism. The ESP32 is a microcontroller that features Bluetooth connectivity. ¶. Nov 1, 2021 · Esp32 Bluetooth classic pareado com celular android executando um app que envia strings. Use this Windows test app to test/see all of the buttons Ensure you have Direct X 9 installed. Select “ESP32test” from this list. MIT App Inventor is a great platform to get you started …. ESP32-BLE-Keyboard. ESP32-S3 supports Bluetooth 5. If you send this command from application, device replies with 10 example strings. This means that we can configure both the classic Bluetooth as well as the low energy Bluetooth (BLE) in the ESP32 board. Device used for coding: ESP32-WROOM-32D. See Setting up devices for information on how you can determine the MAC address of a device and track it using ESPHome. - Board D1 R32 ESP32. ESP32 implementation for HID over GATT Keyboard and Mouse (Bluetooth Low Energy). Aug 7, 2021 · The write on the ESP32 side is a blank example code of the Arduino IDE, the read on the Android-side is made by the BLE-Library publisher. We'll be able to control an LED on/off remotely and we'll also be able to see some arbitrary values that are sent from the ESP32 to the Android app. After successfully paring, Open the “Bluetooth Terminal” Application, and connect to the May 11, 2022 · Remark: After installing the mobile application on your Smartphone, you must follow these steps to connect to the ESP32 card you must: Click on the ‘scan‘ button. This tool was used when testing ESP32-BLECollector. I would like to introduce you this adaptive universal infrared remote control. 4. Everything is being pushed from the Android app, so the ESP32 initializes the Bluetooth stack to advertise its file transfer service. As a result, the . Tap on Connect BLE device. This application lets you scan, discover, and debug your Bluetooth Low Energy devices. print (), and the last value send via Serial. Jan 7, 2020 · Hello friends, I'll write in this topic about BLE on ESP32, send and receive text, with clock and without clock. アプリとESP32の接続. Then a set of handlers receive the framing, handle the data buffers, and save the received data over SPI to the SD card. this repo used Unity Store Asset "Bluetooth LE for iOS, tvOS, android". We will use free dabble mobile app to send commands to contr Feb 24, 2021 · Now configure the button as shown below. In BLE mode, the ESP32 can act as a server as well as a client. • Scenario 2: The ESP32 system is used only as a Bluetooth Controller, and an extra device running the Bluetooth Host is required (such as a Linux PC running BlueZ or an Android device running BLUEDROID, etc). You might also be interested in: ESP32-BLE-Mouse. Start camera app on your smartphone. However, it seems it's unable to receive any data. Go to Devices. Perfect for beginners and enthusiasts looking to explore robotics and wireless communication. Scan BT devices from your smartphone and establish a connection to the "ESP32 Remote Shutter" device. Press the item with name of your device. Works on Android Phones only. The table below shows its architecture. mart1nekx April 28, 2023, 8:43pm 5. Step 4: Prepare the Mobile Application. I have called the connection "esp32" in this example. Now open the app again & tap on connect, select the Bluetooth device. Click on BONDED. If you want, you can implement supporting of your own commands. Send command to device (see below) Device supports command get . 2. Apr 26, 2021 · IMPORTANT UPDATE 30. The ESP32 series employs either a Tensilica Xtensa LX6, Xtensa LX7 or a RiscV processor, and both dual-core and single-core variations are available. This is a comprehensive guide for ESP32 Bluetooth Classic. Note − You may be tempted to use WiFi and Bluetooth simultaneously on ESP32. Then add value -1 to the ReceiveText block to the numbersOfBytes number. println (). Written by Joseph Corleto. Mar 23, 2021 · Bluetooth Low Energy (BLE) is everywhere these days. Search images: D1 R32 ESP32 This card has classic Bluetooth, BLE, WiFi, ADC, DAC, and more feature. aia file gave an error when loade Apr 28, 2024 · ESP32 DOIT DEVKIT V1 Board; Android Smartphone with Bluetooth; 5mm LED; Resistor; Jumper wires; Breadboard; Classic. May 26, 2021 · Working of Bluetooth controlled RC car: As we power the ESP32’s the Bluetooth module starts working and gets connected to a smartphone when you start Dabble App installed on it. Build a fun and easy Bluetooth-controlled robot car using an ESP32 microcontroller. Finally, go back to Terminal. 2022: MIT App inventor updated the BluetoothClient without backward compatibility. Step 2: The Explanation. It could be a useful starting point for someone wishing to build a mobile weather station or similar device based on ESP32. Aug 25, 2019 · Learn how to use ESP32 board to control LED with Bluetooth from your mobile device. • Pin State Monitor: Remotely monitor the live status of devices and debug them. This app is for connect Android and Arduino or ESP32 device by bluetooth serial. Pertama, kita download dulu sebuah aplikasi serial bluetooth pada play store. If you have successfully connected your android smartphone with ESP32, the Jun 1, 2024 · ESP32に搭載されているBluetooth（SPP）を使用してパソコンと無線通信してみます。既存の有線シリアル通信をほぼそのまま無線化できるのでかなり簡単にパソコンやスマホと無線することができて便利。簡単な例題で方法をまとめておきます。 In this project we have use esp-32 to make a bluetooth controlled car using a android application "DABBLE" - THEIOTGUY/ESP32-DABBLE-BLUETOOTH-CONTROLLED-CAR ESP32 # 16: COMO USAR EL BLUETOOTH DE ESP32 Y COMUNICAR CON CELULAR ANDROID Y WINDOWS PCEn este nuevo episodio de la serie Esp32, empezaremos a ver cómo uti by Khaled Magdy. And all this at an excellent price. Simple code to communicate with an App on your Android phone (MIT App Inventor) to an ESP32 (Arduino). I used Thonny IDE for coding. The same name will reflect there. Step-by-step tutorial with wiring diagram, code and video demonstration. restart () instead of esp_deep_sleep () Brownout detector is disabled. In Bluetooth Classic, pairing is initiated manually by the user. You can see ‘ESP32-BLE-Server’ in the list. It’s only allowing to pair one. Press the three dots symbol on the top right corner. In this scenario, Controller and Host are There are so many examples for ESP32 bluetooth servers but I could not find an example code to send data from Android app to ESP32 Bluetooth server so I made one. ) Download the latest release of this library from the release page. Control LEDs by ESP32 and smartphone via Bluetooth. 0 (LE) and is certified for Bluetooth LE 5. This project aims to provide file-sharing capabilities between the ESP32 Bluetooth and any Android/Linux device over their default OBEX protocols, something currently missing from the bluedroid stack bundled with the esp-idf. 3. Push "enter" from the above monitor, then shutter code (Volume Up) will be sent. In Linux I have used bluez library to achieve this functionality. After finding the Micro:bit card, Click on the ‘Stop‘ button. Now go to your Android Phone Bluetooth Setting >> search for new device ; You will find the Device with the name “ESP32test”. 以前に作成したアプリケーションがスマートフォンにインストールされていることを確認します。 最初に、スマートフォンで Bluetooth を有効にします。 スマートフォンの Bluetooth settings に移動し、 ESP32RGB を探します。 May 25, 2021 · BLE can be very power efficient if you regulate the advertising interval. If you leave it blank, then the default name i. Specify the project name and directory. For the ESP-IDF board, we have chosen the custom board option. The app will start scanning for BLE Devices and lists them out. May 30, 2022 · After installing the app, Open Bluetooth Settings of your phone and click on pair new devicea Bluetooth device with the same name that we mention in the code will appear. How BLE normally works is that a device advertises it's name like a beacon, this name can be seen by anyone and is used to identify the device. It provides a secure protocol to pass Wi-Fi configuration and credentials to ESP32-C3. I've updated the functions to include folder selection 1 - 10. It can be used in a robot to provide wireless communication and control. . Just need the auto reconnection to the phone to work. Go ahead and explore the other examples that come along with the BluetoothSerial library. Install the app, then turn on the Bluetooth connection and connect to the ESP32. This is a cheap card ($ 5) with the dimensions and shape of the Arduino UNO, but with the ESP32. Cómo programar un ESP32 para comunicarse con un teléfono inteligente Android a través de Bluetooth. Random mac address is generated based on a reduced version of the oui list. Mar 5, 2018 · Unfortunately it does not show my Android phone even though Bluetooth is switched on. e. If you want you can change this name. ESP32 implementation (Slave) (notes: built by current 1. Oct 11, 2021 · На этом уроке начинаем создавать приложение Bluetooth Терминал на Kotlin с помощью Android Studio. I also cover how to create a Smartphone app on Thunkable which connects to the ESP32. After installing, launch the “Serial Bluetooth Terminal” app. During this scan on the phone it is visible to the ESP32. Instructions can be found here. I made it on PlatformIO. The technology is based on ESP32 Bluetooth and operated via an Android app. 1. Jun 11, 2023 · When i try to pair multiple esp32 boards to a Android phone (Andriod V13). Mar 19, 2021 · Turn on your smartphone’s Bluetooth. This is not recommended. Applications Of Bluetooth Low Energy. 7. May 10, 2019 · For complete project details (schematics + source code), visit https://RandomNerdTutorials. Jan 31, 2020 · Open Serial Bluetooth Terminal and select ‘Devices’ from the menu: Select robot01 from the list to start the Serial Terminal connection: If this is the first time the ESP32 has connected to this Wi-Fi network or the password has changed then you will see the following output. We support six function show below: 1. As soon as the scan is done, the ESP32 cannot see my phone anymore. Select it and tap on OK. How to use. May 5, 2024 · Consulte estos artículos sobre Bluetooth ESP32 para obtener más información. After finding the Micro:bit card, Click on the ‘stop‘ button. Follow our step-by-step guide and start driving today! 🚗 ESP32-WiFi-Bluetooth-Android is a repository containing an ESP32 program and an Android app that connect to each other to set up the ESP32 board to a WiFi network using Bluetooth connection for credentials. In this system, the ESP32 module is a BLE Server (with a GATT service with one writable characteristic): it advertises, waiting for the Android app (the BLE client) to connect and to send the notification messages to display on the OLED display). Android code is in android_app. None of those examples help me understand what's needed for an ESP32 to pair with my Android and act as media buttons, sending volume up, down and play/pause commands via bluetooth. jh wl eq dt rf gq ln th li vc