React Native and Bluetooth Low Energy

Name: React Native and Bluetooth Low Energy
Rating: 3.6 (8 reviews)

Using BLE with embedded devices

Created byYago Caetano

Last updated 3/2026

English

What you'll learn

How Bluetooth Low Energy Works
How to create a complete project able to interact with embedded devices by BLE
How to create your own products with Bluetooth Low Energy
How debug a Bluetooth Low Energy device

Course content

7 sections • 43 lectures • 3h 53m total length

Important Note0:26
01 - Welcome3:05
Explore the differences between classic Bluetooth and Bluetooth low energy, and learn to build a simple React Native app that establishes a BLE connection with an embedded device.
02 – What you will see in this course2:49

03 - What is Bluetooth5:00
04 - Bluetooth Classic vs BLE3:30
Compare Bluetooth Classic and Bluetooth Low Energy, highlighting use cases for peripherals and audio streaming versus power-saving IoT devices and smartwatches, plus differences in data rates and power consumption.
05 - Why BLE is a good option to work with embedded devices4:23
Discover why BLE is the energy-efficient choice for embedded devices, sleeping when idle to save power, and outperforming classic Bluetooth for fitness trackers, beacons, and healthcare devices.
06 - Advertisement5:29
07 - GATT Server5:23
08 - Characteristics in BLE4:24
Explore how Bluetooth characteristics in a GATT server enable read, write, notify, and indication interactions, use standard data types, respect MTU limits, and require proper permissions.
09 - Handling with BLE Characteristics3:15
10 - Recap3:42

11 - What is React Native4:11
12 - Installing React Native - Windows9:59
Android Studio Download Link

https://redirector.gvt1.com/edgedl/android/studio/ide-zips/2023.1.1.28/android-studio-2023.1.1.28-windows.zip
Prerequisites for Linux users0:13
13 - Installing React Native - Linux10:28
Android Studio Download Link

https://redirector.gvt1.com/edgedl/android/studio/ide-zips/2023.1.1.28/android-studio-2023.1.1.28-windows.zip
14 - Creating our first app5:06
15 - Understanding a React Native Project structure3:51
Explore how a React Native project is organized, from git and tests to android and ios folders, node_modules, package.json, and the index.js and App.js entry points.
16 - Handling with UI12:02
Instalation of React Navigation0:19
17 - Handling with UI - part 212:07
Master UI in React Native by implementing screen navigation with stack and bottom tabs navigators. Organize routes, configure navigation container, and use navigate with two screens and a back button.
18 - Understanding React Hooks (useState and useEffect)9:22
Explore how react hooks useState and useEffect manage state and side effects in functional components, contrasting them with class components and illustrating lifecycle behavior.
19 - Installing Third Party libraries3:17
Install the React Native BLE library using npm or yarn, update package.json, and add the plugin line to app.json. Verify the setup with Expo prebuilt and npx expo run.
20 - How execute app in your Android phone3:30
Learn to run React Native apps directly on an Android phone by enabling developer mode, turning on USB debugging, and approving the connection to load the app from your computer.
21 - Introduction to React Native BLE PLX15:53
Explore the React Native BLE PLX library to enable Bluetooth in Android apps, check permissions (BLUETOOTH_SCAN, BLUETOOTH_CONNECT, ACCESS_FINE_LOCATION), verify Bluetooth status, and implement a device scan with a listener.
22 - Recap5:24
Explore how React Native enables cross-platform Android and iOS apps, set up projects with CLI, navigate with stack and bottom tabs, and implement BLE scanning using BLE plx.

23 - What is ESP323:24
Discover the ESP32 microcontroller, a dual-core device with a 2.4 GHz radio, Bluetooth and Wi-Fi connectivity, and GPIOs for embedded systems.
24 - ESP32 Boards2:12
Explore ESP32 development boards, including the ESP32 DevKit V1, NodeMCU ESP-32S, Heltec WiFi Kit 32 with OLED display, and ESP32-CAM with OV2640 camera module.
25 - ESP32 Hardware Structure4:20
26 - Creating a firmware project using PlatformIO4:53
27 - Using ESP32 BLE4:59
Build a BLE device on the ESP32 with PlatformIO, configure a GATT server and service, enable advertisements, and implement custom connect and disconnect callbacks, plus serial debugging.
28 - Wokwi a online tool to simulate ESP32 projects3:58
Explore Wokwi, an online electronics simulator for Arduino and ESP32, with code on the left and circuit visualization on the right, plus a library manager for third-party libraries.
29 - Recap5:24

30 - The final project requirements5:04
31 - Mounting the circuit3:00
Mount the final project circuit in wokwi and on a breadboard, wiring lcd i2c to esp32: vcc 3.3v, gnd, sda gpio21, scl gpio22, powered via usb.
32 - ESP32 firmware6:02
33 - Testing firmware with nrfConnect app1:52
Test firmware using the nrfConnect app by scanning for the RN_BLE_IOT device, connecting, enabling notifications on the second characteristic, and writing to the first to confirm successful communication.
34 - Creating React Native app logic17:50
35 - Connecting to BLE Device11:22
36 - Styling the application8:36
37 - Final demo2:12
Connect the React Native app to the ESP32 board and send messages via BLE to complete the final project that blends theory from the previous modules.
Final Project for Download0:16

Requirements

Basic programming skills
Basic knowledge of JavaScript
An ESP32 development board (for the final project only)

Description

In this course, we will delve into the fascinating world of Bluetooth technology. Specifically, we will focus on a specialized branch known as "Bluetooth Low Energy" (BLE). BLE is widely used for applications that require minimal power consumption, making it ideal for modern, battery-operated devices such as fitness trackers, smartwatches, and various Internet of Things (IoT) applications.

Throughout the course, we will design and develop a simple yet effective product using the ESP32 microcontroller that implements the BLE protocol. The ESP32 is a powerful and versatile microcontroller with integrated Wi-Fi and Bluetooth capabilities, making it a perfect choice for our project. Additionally, we will create an Android application that will communicate seamlessly with our BLE-enabled product, enabling real-time data exchange and control.

This hands-on approach will not only provide a thorough understanding of BLE technology but also equip you with practical skills in both hardware and software development. By the end of the course, you will have gained valuable experience in designing and programming BLE devices, developing mobile applications, and understanding the principles of wireless communication. Whether you are a hobbyist, a student, or a professional looking to expand your skill set, this course will provide you with the knowledge and tools necessary to create innovative and energy-efficient Bluetooth applications.

Important Note:

This course is no longer actively updated due to the fast evolution of the React Native BLE ecosystem. The content focuses on the fundamental concepts and the overall architecture of a BLE project where a mobile application communicates with a device. It should be considered an introductory and conceptual guide rather than a course covering the latest library versions.

Who this course is for:

React Native developers and students
People who are interested in IoT
People who are interested in embedded devices
People interested in increasing connectivity in their embedded device projects

React Native and Bluetooth Low Energy

What you'll learn

Explore related topics

Course content

Introduction3 lectures • 6min

Bluetooth8 lectures • 35min

React Native14 lectures • 1hr 36min

ESP327 lectures • 29min

Final Project9 lectures • 56min

Conclusion1 lecture • 6min

Extras1 lecture • 5min

Requirements

Description

Who this course is for: