{"id":1197,"date":"2025-03-11T14:46:35","date_gmt":"2025-03-11T14:46:35","guid":{"rendered":"https:\/\/www.bleuio.com\/blog\/?p=1197"},"modified":"2025-03-17T14:04:23","modified_gmt":"2025-03-17T14:04:23","slug":"how-to-use-bleuio-as-a-usb-serial-device-on-android-with-capacitor","status":"publish","type":"post","link":"https:\/\/www.bleuio.com\/blog\/how-to-use-bleuio-as-a-usb-serial-device-on-android-with-capacitor\/","title":{"rendered":"How to Use BleuIO as a USB Serial Device on Android with Capacitor"},"content":{"rendered":"\n

This project demonstrates how to use the BleuIO USB dongle as a serial port on an Android device via OTG (On-The-Go) USB. With Capacitor 6 and the @adeunis\/capacitor-serial<\/code> plugin, we establish a serial connection, send AT commands, and read responses in real time. This project works with both BleuIO<\/a> and BleuIO Pro<\/a>.<\/p>\n\n\n\n

This tutorial provides a step-by-step guide to setting up serial communication with BleuIO on Android. The project connects to BleuIO via a serial port, sends basic ATI<\/strong> commands, and displays the received response on the screen. This example serves as a starting point for creating, testing, and debugging Bluetooth Low Energy (BLE) applications<\/a>. It can be expanded to support additional commands and functionalities based on specific needs. The full source code<\/a> is available for customization and further development.<\/p>\n\n\n\n

Use Cases<\/h2>\n\n\n\n

The BleuIO USB dongle can be used in various applications that require serial communication on Android. One of the most common applications is Bluetooth Low Energy (BLE) development, where developers need to configure and test BLE modules by sending and receiving AT commands. This project allows for mobile debugging and real-time configuration of BLE devices without needing a PC.<\/p>\n\n\n\n

Additionally, this setup is valuable for IoT and embedded systems<\/strong>, where devices communicate over a serial connection. With an Android phone acting as a serial terminal, engineers and developers can test, monitor, and debug hardware components in the field without requiring a laptop. Another important use case is USB-to-serial debugging, where embedded system engineers need to send commands and receive logs directly from an Android device using OTG.<\/p>\n\n\n\n

For those working with sensor modules, microcontrollers, or custom embedded systems, this project simplifies the process of sending commands and reading responses directly from a mobile device. It also serves as an excellent starting point for developing Android applications that require serial communication through Capacitor.<\/p>\n\n\n\n

Why Do We Need This?<\/h2>\n\n\n\n

Android devices do not natively support USB-to-serial communication. Unlike computers, which come with built-in serial drivers and terminal software, Android does not provide a direct way to communicate with serial devices over USB. This makes it difficult for developers, engineers, and embedded system designers to interact with BLE modules, sensors, and microcontrollers.<\/p>\n\n\n\n

By using Capacitor 6 with the @adeunis\/capacitor-serial<\/code> plugin, we can bridge this gap and allow Android devices to function as serial terminals. This is especially useful when working with devices like BleuIO<\/a><\/strong>, where real-time communication is essential for configuring, testing, and debugging Bluetooth applications.<\/p>\n\n\n\n

This project removes the need for external adapters or complex Android development, leveraging Capacitor\u2019s web-based approach. It offers a simple and scalable way to integrate serial communication into mobile applications without requiring in-depth knowledge of Android\u2019s USB APIs or native development tools.<\/p>\n\n\n\n

Requirements<\/h2>\n\n\n\n

To use this project, you need a few essential components to establish serial communication between an Android device and BleuIO<\/strong>.<\/p>\n\n\n\n