Espressif developed Android and iOS apps that support Wi-Fi provisioning for its devices like the ESP32 boards. I am using Android version 13 and Arduino IDE version 2. Jan 29, 2020 · To get you started with ESP-NOW wireless communication, we’ll build a simple project that shows how to send a message from one ESP32 to another. Apr 1, 2024 · The code is very simple. With Free-RTOS (with multicore), WiFi, BLE, plenty of GPIOs, peripherals support, etc. 2. It works with MTU sizes from 20~600B, but performance is much better at higher MTU. Do not rely on timing for this, which is unreliable. As a result, the . Note: this project Jun 4, 2020 · Idahowalker June 4, 2020, 11:32am 2. Try the nRF Connect app and try to connect to your esp by bluetooth. [中文] ESP-IDF currently supports two host stacks. Press the item with name of your device. setOnClickListener {. It will also send active location information to Android. I tried to disable the built-in library but it did not work either. Nov 8, 2022 · Ahora que ya sabemos conectar nuestro ESP32 con Bluetooth, vamos a Enviar datos al ESP32 vía Bluetooth con App Inventor, pero antes vamos a comprender que es Aug 24, 2020 · Hello, I'm new to app making and arduino and I have this project that will send data from my esp32 to my app using BLE. On the Arduino, set up the Bluetooth module (such as a HC-05 or HC-06) and make it discoverable. A new window will open add firebase to your android app. Aug 6, 2019 · Step 3: Connecting the Hardware. Jun 18, 2023 · Abstract: Learn how to receive data with Bluetooth through a Flutter app in this comprehensive guide for ESP32 developers. Tap on Connect BLE device. Connect the KX132 Accelerometer to one of the Thing Plus boards using a Qwiic cable, this is the "Server" board. mac addresses, device names) I found May 3, 2021 · Android編. In this tutorial we'll be building an Android app that connects to the ESP32 via Bluetooth to establish two-way communication. It can be used in a robot to provide wireless communication and control. Specify the project name and directory. The variable "data" of the Android code is the received char-array. be/--Fj8QDlGuQArduino Step by Step course th Bluetooth® API. The app is I am able to discover, connect to bluetooth. A mobile app with a Bluetooth Terminal works perfectly for this. 1) Open Arduino IDE >Go to tools > Board ESP32 Dev Module and Select port 3. BluetoothSerial SerialBT; Apr 26, 2024 · The first step in creating our Flutter app for ESP32 is to create a Makefile. Android Smartphone <-> ESP32 Bluetooth. 1. We’ll control an ESP32 output, and send sensor readings. In the AI2 Designer, set the Delimiter attribute of the BlueTooth Client component to 10 to recognize the End of Line character Nov 24, 2021 · Hello friends, this topic is about sending data from an ESP32 to the application via WiFi in real time. Serial. Also don't Apr 18, 2016 · How do you process and receive serial data via Bluetooth and Python? I'm trying to make a simple Python server that access data via Bluetooth as explained here. Click add Bluetooth or devices and click Bluetooth and wait some seconds. Select Serial in the connection type option, write the correct COM port of incoming Bluetooth (COM5 in our example). begin (); //create function END. Everything is being pushed from the Android app, so the ESP32 initializes the Bluetooth stack to advertise its file transfer service. Now navigate to the manifests/AndroidManifest. 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. Now press the ‘Connect Bluetooth’ button. After you have uploaded your code to the Arduino development board press its ENABLE button. For the ESP-IDF board, we have chosen the custom board option. Yes it is possible. 2 BR/EDR and BLE specifications. The ESP32 is a web-server with a local IP, mobile app is connected to the same local network. We’ll send a structure that contains a variable of type char, int, float, and boolean. e. Wait for device connecting. Mar 11, 2021 · Hello, yesterday I was searching for a suitable smartphone app creator app for my project and I came across MIT APP Inventor - which means my question will probably be very basic and easy to answer for most. In which case, you can use a BLE plugin, use protobufs to implement the transport layer, then add in curce25519 cryptography & SHA256 hashing for the proof of possession (if you're using it) to create a shared key. Feb 7, 2020 · I've tried using react-native-ble-plx but I've a feeling that isn't the right way to pass the text input to. i. 2. Nov 11, 2021 · The ESP32 client connects to the BLE server and it is notified of its temperature and humidity characteristic values. Go to Settings and select Connected devices: Select Pair new device: May 22, 2020 · 3. Step 2: Uploading Code to ESP32. #include<WiFi. This video explain how to send data from ESP32 to android Sep 12, 2022 · I'm trying to Connect directly esp32 BLE with mobile without the help of the Bluetooth serial Terminal app. Espressif has developed the app EspBlufi specifically for Bluetooth networking of IoT devices. Lets connect the ESP32 using Bluetooth. I've tested using the Bluetooth Terminal Android app and was able to send text data to my Bluetooth Module/Arduino device. Also for unique identification between sender and receiver (i. Might you have downloaded this code from my G Oct 9, 2019 · Besides the WiFi module, ESP32 also equipped with Bluetooth modules. Après avoir trouvé la carte Micro:bit, Cliquer sur le bouton ‘Stop’. button. 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. I have Android 9 but other mobiles should be very similar. Also, I would like to point out some parts of the code, like: // Bluetooth Serial object. Exchange Data With ESP32 Bluetooth & Android Smartphone. Apr 4, 2018 · If you have the device connected to a computer, you can use the keyboard and mouse functions to print out the data into an application on the computer that could create a file. A client can have many simultaneous connections with multiple servers. I've read about ESP32 now communication protocol (but don't know exactly if it's low power) Reason I want to use BLE is for low power usage. The Esp32 is a powerful board with 2 cores, 520K RAM, 34 GPIO, 3 UART, Wifi and Bluetooth Dual Mode. Nov 19, 2019 · Assume you're talking about ionic. Sep 15, 2022 · 1. Suppose we want to send two information at the same time, for example we want to turn on LED12 and turn off LED13. Click the settings icon, then select Pair new device. Pair with ESP32. Nov 17, 2022 · After inserting your network credentials, phone number and API key, you can upload the code to your board. To send the data we will use the Serial Monitor. 2) Than copy and paste the code in Arduino IDE. Create an object of class ‘BluetoothSerial’ and begin the communication using ‘begin ()’ function. Introduction to ESP32 is here https://youtu. The same name will reflect there. Go to Devices. py: Flask server code for handling incoming data, storing it in an SQLite database, and serving the dashboard. Once connected it will show connected. The majority of the code implements a set of callbacks for the Bluetooth stack. The Bluedroid based stack (default) supports classic Bluetooth as well as Bluetooth Low Energy (Bluetooth LE). h>. It is also known as Smart Bluetooth. Now it you mobile will try to connect with ESP32 Bluetooth. Pair the smartphone and the Arduino via Bluetooth. I used Thonny IDE for coding. I basically want to replicate that. On the smartphone, use the serial communication API to send a message to the Arduino ‘s Bluetooth module. To do that go to Settings>>Devices>>Bluetooth and others devices. 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. I'm experimenting with BLE using two ESP32. Open the serial monitor so you can check the progress of the steps below. Then a set of handlers receive the framing, handle the data buffers, and save the received data over SPI to the SD card. Select it and tap on OK. 3) Open the serial monitor and select the right braud which you mention in your code. Nov 19, 2018 · Can two esp32 devices send and receive information from each other via bluetooth(ble)? I've been searching the internet but am not getting clear answers. The pin is specified on the line below. // This is my code from Arduino IDE. The ESP32 Bluetooth device will receive and send data over Bluetooth in this example. I'll use the codes of Neil Kolban. Sending Sensor Data to Android Phone using Arduino and NRF24L01 over Bluetooth (BLE) Bluetooth Low Energy (BLE) is a version of Bluetooth and it is present as a smaller, highly optimized version of the classic Bluetooth. I'll show you two examples: the Bluetooth Serial Library for ESP32 Oct 31, 2023 · In this section, let’s create an ESP-IDF project to use Bluetooth Classic of ESP32. But a server can have only one connection at a time. connectGatt(getApplicationContext(), true, mGattCallback); Jun 11, 2024 · The idea is using BLE to send or receive sensor readings from other devices. , ESP32 is used. So in this tutorial, I will share with you how to use the Bluetooth module and control ESP32 mobile robot using an Android app. Do note that with BT, and SPIFF's enabled getting the correct partition scheme will be important. Go to your WhatsApp account. On the other hand, Apache NimBLE based stack is Bluetooth Low Energy only. Sep 6, 2019 · Learn about how to control an LED using ESP32 and your mobile device. Yes the Log. ESP32-A the server and ESP32-B as the client. This will be an empty terminal where you can type, hit enter and send a message. We’ll exchange text between the Serial Monitor in our Arduino IDE and a Terminal application on a phone or tablet. This transmission of data from the module to the application will occur via Google Firebase. In this example, we will send the data from Computer to ESP32 on Serial Communication. I like to turn on/off LED to the server when a button is pushed on the client. Upload the Server code to the board using the USB-C cable (diagram shown above in "The Project" section). My server. 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. After that you will see a Bluetooth device named ESP32test. For that, the ESP32 needs to be connected to a Wi-Fi network with internet access. very important for dynamically sending data to ESP32 (WiFi credenti Jan 4, 2021 · Your advertisement seems to setting the type of advertisement broadcast and the Shortened Local Name to "HomeIO" to use in the advertisement. At the end of the day is very similar to Socket programming. Open your VS Code and head over to View > Command Palette. If you want, you can implement supporting of your own commands. 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. Click on the upload button to upload the code into the Arduino development board. Copy the app package name and paste in firebase field and click on the register app. You can use any serialization library you want. In the loop, we send and receive the data via Bluetooth Serial. Oct 21, 2022 · I had used kotlin to connect with wifi to an ESP32. 4) Than open your bluetooth in mobile phone. Copy the next sketch to your Arduino IDE (type your SSID and password): /* Rui Santos Complete project details at Complete project details at https Aug 18, 2023 · Hello, I have been trying to follow this guide but without success. Source Code---Connect via bluetooth to Remote Device: //Get the device by its serial number bdDevice = mBluetoothAdapter. Open the MIT Companion app on your smartphone. The bluetooth-reading runs on a background thread. These readings will automatically update to new values in real-time when the IoT app receives them. h> //#define USE_PIN // Uncomment this to use PIN during pairing. You can send serialized data over BLE. I found a few tutorials/examples related to this, but I haven't been able to get any of them to work. Feb 28, 2020 · Wired components. After finding the Micro:bit card, Click on the ‘stop‘ button. Jan 29, 2022 · Hi I appreciate help to use buttons on arduino or esp32 board and send data by bluetooth that I can use it in MIT app inventor. So on the mobile app we create a json message to post it to the ESP32 IPS, something like this: ui. The Apr 11, 2024 · To provision the ESP32 via BLE, we need to use another BLE-enabled device, usually a smartphone to connect to the ESP32 via BLE and send the Wi-Fi credentials. We’ll use a timer interrupt to generate a periodic event at which we’ll read the ADC and send its raw value over Bluetooth. And all this at an excellent price. First if statement: we check if bytes are being received in the serial port. My phone can scan and recognize the ESP32 but it could not connect. Step 1: Obtaining MAC Addresses. xml on the left. Check the link below: ESP32 Bluetooth Classic with Arduino IDE – Getting Started (only compatible with Android Smartphones) In project settings, select the general tab and in the bottom click on android icon. // I confused process of connecting between ESP and smartphone. This is a cheap card ($ 5) with the dimensions and shape of the Arduino UNO, but with the ESP32. Here is an example Makefile: # This is a Makefile for building and flashing ESP32 firmware. Choose one that has both Flutter and ESP32 support. //I set ESP to AP mode. You need May 26, 2024 · For our next demonstration, we will communicate using Bluetooth Classic. d effects the performance, but it does not drop it that much. Other Bluetooth-related tutorials that you may like: ESP32 with Bluetooth and Bluetooth Low Energy: The Ultimate Guide; ESP32 BLE Server and Client (Bluetooth Low Energy) ESP32 Wi-Fi Provisioning via BLE (Bluetooth Low Energy) – Arduino IDE Jan 7, 2020 · Hello friends, I'll write in this topic about BLE on ESP32, send and receive text, with clock and without clock. visorTexto. 4 • The phone can now also connect to the Bluetooth device and send commands directly to control the device if the Wi-Fi network is down. Appuyer sur le nom de la carte ESP32. The BLE was designed keeping in mind the lowest possible power consumption Jul 20, 2020 · I can't aid you with the C# part but I've written code to send data over the HC-06 module for arduino and communicated with an Android app via bluetooth and bluetooth low energy. EspBlufi ESP32 is compliant with Bluetooth v4. Finally click on the ‘connect‘ button. You can find the screenshots of the tests performed with the Serial Bluetooth Terminal App below. aia file gave an error when loade We aim to build an application that will display sensor readings obtained from DHT11 connected with the ESP32 module programmed in Arduino IDE. What exactly I am trying to do is simple - I am working on a very specific project and I need to read stored values in my ESP32 EEPROM where ESP32 is connected to my smartphone via BT. This video explain how to send data from ESP32 to android Jun 11, 2022 · 06-11-22 2820. Here we have named Blynk-Test in the code. Topic. Install Serial Bluetooth Terminal or any similar app from the Play Store on your Android or iOS device. This card can be May 3, 2020 · This video briefly shows a demonstration before starting a project with Bluetooth Classic. There’s a short and simple Arduino sketch that will find the MAC address of each device, and this one should go in your drawer of super-useful Arduino utility sketches right next to your I2C In video B-07 we saw how to make an android app to get sensor data. If advertised services is empty, it is an advertisement problem. Then, open Serial Bluetooth Terminal application. One can use the ESP32's documentation, the ESP32 API API Reference - ESP32 - — ESP-IDF Programming Guide latest documentation as a source of information. Our aim is to send sensor readings from ESP32 server to ESP32 client via Bluetooth Low energy (BLE) connection. Many APIs return data in JSON format. py file, which sends a random number when sent the text "temp", is: Jan 11, 2024 · After that, the top of your page should have a tab that looks like this: Click on “Sync Now” and wait for it to finish. This ESP32 is connected to an OLED display and it prints the latest readings. You can use this component to establish a connection, send and receive data, and manage Bluetooth interactions. every few seconds and then receive it by bluetoothClient in MIT app, even in my case is possible to display values assinged to button press. I am still kind of a noob with android development and micro controllers. This file will contain the commands needed to build and flash our ESP32 firmware. How to connect the ESP32 with Mobile Bluetooth. May 21, 2022 · Advertisement of the one which serves the services: the ESP. When I followed the guide, the Neil Kolban's ESP32 library was conflicting with the built-in Arduino IDE ESP32 library. This video ex Oct 28, 2022 · Learn how to send data from one ESP32 board to the other using HTTP requests: ESP32 Client-Server Wi-Fi Communication Between Two Boards; The ESP32 can also make HTTP requests to third-party services on the internet to send or receive data. In that app, click your device and press client in the upper menu. IMPORTANT UPDATE (30. If you send this command from application, device replies with 10 example strings. 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’. Firstly, we will see a simple example to send data from ESP32 to an Android app. With Web BLE, you can create web applications that interact with your ESP32 devices via Bluetooth, enabling you to control GPIO pins, exchange data Apr 26, 2021 · IMPORTANT UPDATE 30. It is no issue to send data from esp32 by bluetooth periodically, eg. I've used PROTOBUF before and I thought it was pretty cool, but it May 5, 2022 · #esp32 #web #androidapp #iot #arduino #digitalneering #espandroid #androidstudio Video tutorial about connection between ESP32 and android app. It can transfer large files, but the rate is pretty slow, limited by the BLE bandwidth. Apr 19, 2024 · With the esp32 gps module, it will go to the target coordinates in the list, respectively, with the case command. ; app. We can use an Android or iOS app or a Web Bluetooth app. There are always dependency issues or other errors. setText("") Jan 28, 2018 · Smartphone makes http request to ESP, sends POST data with it, gets data back in the response. Pair your android phone with HC-05 module. The purpose of the Android app is to establish a two-way communication system via 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. After uploading, open the Serial Monitor at a baud rate of 115200 and press the board RST button. Jul 11, 2022 · The “Connect Bluetooth” button searches for Bluetooth devices and shows a pop up with results and allows the user to select from one of the devices. Sep 24, 2019 · Author. getRemoteDevice(blackBox); //for ble connection bdDevice. 0. Dec 24, 2023 · The app needs to receive and display data from an ESP32 via bluetooth serial. //this is my app inventor code. Site that we w 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. server. You can pass the name of the ESP32 Bluetooth Device as an argument to the ‘begin ()’ function. ESP32 HTTP GET: JSON Data Object or Plain Text. - Board D1 R32 ESP32. This project is divided into two parts: Part 1 – ESP32 BLE server. Feb 8, 2021 · I wrote this BLE-FTP service to transfer configuration files back-and-forth from my ESP32 to a Android/iOS App (Cordova). Feel free to use a different accelerometer, but make sure to remove the KX132 library and 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. It is able to control for example an LED on/off remotely, facial recognition door locks to IoT Based Smart Water Irrigation Systems by sending values from the ESP32 to the Android app and vice-versa. I had changed the Bluetooth Jan 31, 2020 · If you are using the ESP32-CAM, remember to disconnect pin 0 and press reset. The ESP32 is a microcontroller that features Bluetooth connectivity. I get a request to show how to get multiple data and show them on the apps. Here is my current block for the app, but still figuring stuffs out, I cant make my bluetooth device list appear when i press the button. Jan 30, 2022 · You are not using line delimiters properly Standard Advice: Please see the Delimiter article in FAQ Be sure to use println() at the end of each message to send from the sending device, to signal end of message. #include "BluetoothSerial. For users to make a choice: For usecases involving classic Bluetooth as well as Bluetooth It will help you pair with your ESP32, show you the messages received from ESP32, and also help you send messages to your ESP32. ui. Control LEDs by ESP32 and smartphone via Bluetooth. Jul 3, 2022 · I commented in my previous message that it is best to make a small program to study its operation, I also commented that Slider is not a good option to send information, unless you use it with a Clock. 2022): MIT App Inventor updated their Bluetooth library without backward compatibility. - App sends several information at the same time. This next example shows how to make an HTTP GET request to get a JSON object and decode it with the ESP32. To install it on an Android device, click here. We'll use Bluetooth Classic to control an ESP32 output and send sensor readings to an Android smartphone. In this tutorial, you'll learn how to exchange data between an ESP32 and an Android smartphone using the ESP32 Bluetooth Classic with Arduino IDE. Send command to device (see below) Device supports command get . ESP32 sending and receiving data using bluetooth low energy and debugging using ESP-prog. Terminal App (Android or IoS) To prepare for the next demonstration, you will require a Terminal application on your phone or tablet. Then, upload the code below to your ESP32. Most of the tutorials are from 2-3+ years ago and might be outdated. 1. , Smartphone. Part 2 – ESP32 BLE client. This is all I know. When I tried to connect directly with mobile here is the pop-up I got. Watch on. Type ESP-IDF: New Project in the search bar and press enter. Compile and upload the code. Launch the terminal session. If this data is available, then send that information via Bluetooth to the connected device. h" #include <WiFi. Code it out. Discover the benefits of using Flutter and ESP32 for mobile app development and explore the step-by-step process of setting up your project and receiving data via Bluetooth. Finally, go back to Terminal. 2022: MIT App inventor updated the BluetoothClient without backward compatibility. Finally click on the ‘connect’ button. I just want to send the coordinates of the points I marked with a marker. In this example we will use the same App as in the previous example. It should successfully connect to your network and send the message to WhatsApp. Is there an example/tutorial showing how to wire up the button & LED and send data back and forth? In this tutorial, we will explore how to use the Bluetooth Classic on ESP32 with Arduino IDE. ino: ESP32 Arduino code for reading sensor data, connecting to Wi-Fi, and sending data to the server. This is why the phone fails to connect because there is no GATT server setup for it to connect to. An equivalent app for iOS could be BluTerm. The “Connect Wifi” button will send the values of the SSID and Password inputs to the ESP32 over a Bluetooth connection (which requires connecting to the ESP32 with the “Connect Bluetooth Mar 13, 2018 · 1. begin(115200); Next we call the begin method of the BluetoothSerial object, to initialize the Bluetooth interface. Esp-IDF is very good SDK, to developer Esp32 projects. In BLE, there are two types of devices known as the server (Peripheral) and the client (Central). Mar 19, 2021 · Turn on your smartphone’s Bluetooth. Serializing data means converting your data into binary data (googling serialization will give you more information). Now open the app again & tap on connect, select the Bluetooth device. In order to communicate with any device over WiFi, we need to know its Media Access Control Address, or MAC address. Mar 25, 2024 · Now, to see Bluetooth values first you need to pair your ESP32 Bluetooth with your Windows PC. Apr 29, 2021 · Use ESP32 send LDR sensor to android using bluethoothContent- ESP32 Board Development- Send LDR’s data to Android Phone Using Bluetooth ESP32 is a single 2. 2023-06-18 by DevCodeF1 Editors. One ESP32 will be the “sender” and the other ESP32 will be the “receiver”. It’s time to do the coding! Make sure you’ve obtained both the BMP180 and the I2C LCD device addresses before proceeding (read here for detailed instructions Feb 24, 2021 · Now configure the button as shown below. For users to make a choice: For usecases involving classic Bluetooth as well as Bluetooth We have a detailed tutorial explaining how to exchange data with the ESP32 via Bluetooth Classic. Enfin Cliquer sur le bouton ‘connect’. Press the name of the ESP32 board. If you leave it blank, then the default name i. - KELVI23/android-ESP-32-bluetooth-arduino single-node. Therefore the ESP should be discoverable, thus not connected to another device. Before that, you may need to refer the following tutorial first: Data Logging Using Favoriot IoT Platform and ESP32 (to install ESP32 board package) Jul 5, 2021 · On the smartphone, ensure that Bluetooth is enabled and scan for available devices. Download the google-services json file and click next. First, install the ESP32 Add-on library in Arduino IDE. 3. BluetoothSerial SerialBT; Moving on to the Arduino setup function, we start by opening a wired serial connection, so we can print the content we receive via Bluetooth. We will use and adapt the codes on this website: https://cir&hellip; Apr 8, 2020 · 2. But I can't find any way to keep that data as variable I Feb 24, 2024 · Read & Write ESP32 From Android using Kodular Via Bluetooth SerialIn This video I show you how to communicate to ESP32 in Kodular via Bluetooth communication Dec 27, 2023 · To test Bluetooth Classic functionality, we need another device to connect and send data to ESP32. . Search images: D1 R32 ESP32 This card has classic Bluetooth, BLE, WiFi, ADC, DAC, and more feature. Now open the third instance of putty. Here is a small example for you to study how to send information by BT. Notify. # Set the path to the ESP-IDF. Bluetooth® API. I'm trying to learn how this comms work and would be very much be grateful for your help. After finding the Micro:bit card, Click on the ‘Stop’ button. 09. Now tap on this device and click on pair to pair the ESP32 with our smartphone. May 5, 2022 · #esp32 #web #androidapp #iot #arduinoVideo tutorial about connection between ESP32 and android app. Connecting a Mobile Phone to the ESP32. For demonstration, we will establish bidirectional data communication between the ESP32 and an Android cell phone over Bluetooth Classic. After that: Press the search button. So for the C# part this user has a basic working C# BT communication example May 14, 2024 · The ESP32 comes with Wi-Fi, Bluetooth Low Energy, and Bluetooth Classic. Androidは基本的にはサンプルソースを読むのが大変だったので、Bluetooth の概要を参考にしました。 ここのソースコードを全部コピーしただけでは動かなかったのですが、動かないポイントとしてはクライアント側の接続にありました。 Aug 24, 2023 · 3- Bluetooth Component: App Inventor includes a Bluetooth component that simplifies the process of setting up Bluetooth communication between your app and external devices like the ESP32. Follow these steps: Open app and enable Bluetooth; Tap ESP32 device to pair 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. lo jc ls wi oi bb ix hh so qd