{"id":558,"date":"2023-12-18T19:21:00","date_gmt":"2023-12-18T19:21:00","guid":{"rendered":"https:\/\/www.bleuio.com\/blog\/?p=558"},"modified":"2023-12-19T18:07:06","modified_gmt":"2023-12-19T18:07:06","slug":"developing-ble-applications-a-tutorial-for-linux-mac","status":"publish","type":"post","link":"https:\/\/www.bleuio.com\/blog\/developing-ble-applications-a-tutorial-for-linux-mac\/","title":{"rendered":"Developing BLE Applications : A Tutorial for Linux\/MacOS"},"content":{"rendered":"\n<p>Bluetooth Low Energy (BLE) technology has become increasingly popular for creating wireless applications with low power consumption. In this tutorial, we&#8217;ll explore the process of scanning for nearby BLE devices, connecting to a specific device, and reading characteristics using the BleuIO BLE USB dongle. The tutorial is designed for Linux\/MacOS environments.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Introduction to BleuIO<\/h2>\n\n\n\n<p><a href=\"https:\/\/bleuio.com\/\">BleuIO<\/a> is a versatile Bluetooth Low Energy USB dongle that simplifies BLE application development. It supports the AT command set, allowing developers to interact with the dongle using familiar commands. Whether you&#8217;re a seasoned BLE developer or just getting started, BleuIO offers a convenient and efficient way to work with BLE applications.<\/p>\n\n\n\n<div style=\"height:36px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p class=\"has-text-align-center\"><strong>Forget complex libraries and complicated programming. Develop BLE applications effortlessly through simple AT commands.<\/strong><\/p>\n\n\n\n<div style=\"height:39px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h3 class=\"wp-block-heading\">Setting Up the Development Environment<\/h3>\n\n\n\n<p>Before diving into the tutorial, ensure you have the following prerequisites:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong><a href=\"https:\/\/www.bleuio.com\/\">BleuIO USB Dongle:<\/a><\/strong> Connect the BleuIO dongle to your computer.<\/li>\n\n\n\n<li><strong>Python:<\/strong> Ensure that Python is installed on your system.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Writing the BLE Application Script<\/h3>\n\n\n\n<p>The provided Python script demonstrates the process of connecting to the BleuIO dongle, scanning for nearby BLE devices, and reading characteristics. Let&#8217;s break down the key components of the script:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code># Importing necessary modules\nimport serial\nimport time\n\n# Establishing connection to the BleuIO dongle\nconnecting_to_dongle = 0\nprint(\"Connecting to dongle...\")\n\nwhile connecting_to_dongle == 0:\n    try:\n        # Configuring the serial connection\n        console = serial.Serial(\n            port='\/dev\/cu.usbmodem4048FDE52CF21',\n            baudrate=57600,\n            parity=\"N\",\n            stopbits=1,\n            bytesize=8,\n            timeout=0\n        )\n        if console.is_open.__bool__():\n            connecting_to_dongle = 1\n    except:\n        print(\"Dongle not connected. Please reconnect Dongle.\")\n        time.sleep(5)\n\n# Sending commands to the BleuIO dongle\nconsole.write(str.encode(\"AT+CENTRAL\"))\nconsole.write('\\r'.encode())\ntime.sleep(0.1)\nconsole.write(str.encode(\"AT+GAPSCAN=3\"))\nconsole.write('\\r'.encode())\ntime.sleep(3.5)\nconsole.write(str.encode(\"AT+GAPCONNECT=&#91;1]D1:79:29:DB:CB:CC\"))\nconsole.write('\\r'.encode())\nconsole.write(str.encode(\"AT+GATTCREAD=0013\"))\nconsole.write('\\r'.encode())\n\n# Waiting for the dongle to respond\ntime.sleep(1)\nout = \"\"\nwhile console.inWaiting() &gt; 0:\n    out += console.read(console.inWaiting()).decode()\nelse:\n    if not out.isspace():\n        print(out + \" \")\n        out = \" \"\n<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Explanation:<\/strong><\/h3>\n\n\n\n<p><strong>1. Connecting to BleuIO:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Download and install a serial terminal emulator like&nbsp;<code>screen<\/code>&nbsp;or&nbsp;<code>minicom<\/code>.<\/li>\n\n\n\n<li>Ensure your dongle is connected and note its port (e.g.,&nbsp;<code>\/dev\/cu.usbmodem4048FDE52CF21<\/code>).<\/li>\n\n\n\n<li>Run the script with the correct port and baudrate (57600) in your terminal.<\/li>\n\n\n\n<li>The script attempts connection until successful, then sends essential AT commands:\n<ul class=\"wp-block-list\">\n<li><code>AT+CENTRAL<\/code>: Configures BleuIO as a central device (scanning\/connecting).<\/li>\n\n\n\n<li><code>AT+GAPSCAN=3<\/code>: Starts scanning for BLE devices for 3 seconds.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<p><strong>2. Selecting and Connecting:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>The scan results will appear in your terminal.<\/li>\n\n\n\n<li>Identify the desired device, usually by name or MAC address.<\/li>\n\n\n\n<li>Replace&nbsp;<code>D1:79:29:DB:CB:CC<\/code>&nbsp;in the script with your device&#8217;s MAC address.<\/li>\n\n\n\n<li>Send&nbsp;<code>AT+GAPCONNECT=[1]D1:79:29:DB:CB:CC<\/code>&nbsp;to connect to the device (replace&nbsp;<code>the mac<\/code>&nbsp;address with your desired device if needed).<\/li>\n<\/ul>\n\n\n\n<p><strong>3. Reading a Characteristic:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Every BLE device exposes characteristics containing specific data.<\/li>\n\n\n\n<li>Replace&nbsp;<code>0013<\/code>&nbsp;in&nbsp;<code>AT+GATTCREAD<\/code>&nbsp;with the characteristic&#8217;s UUID to read its value.<\/li>\n\n\n\n<li>This script reads the characteristic with UUID&nbsp;<code>0013<\/code>&nbsp;and prints its value. Currently its showing the device type.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">The outout<\/h3>\n\n\n\n<p>The output will be shown on the screen as <\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>Value read: SSD002\/2B\nHex: 0x5353443030322F3242\nSize: 9<\/code><\/pre>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"875\" height=\"610\" src=\"https:\/\/www.bleuio.com\/blog\/wp-content\/uploads\/2023\/12\/ble-linux-project.jpg\" alt=\"\" class=\"wp-image-560\" srcset=\"https:\/\/www.bleuio.com\/blog\/wp-content\/uploads\/2023\/12\/ble-linux-project.jpg 875w, https:\/\/www.bleuio.com\/blog\/wp-content\/uploads\/2023\/12\/ble-linux-project-300x209.jpg 300w, https:\/\/www.bleuio.com\/blog\/wp-content\/uploads\/2023\/12\/ble-linux-project-768x535.jpg 768w\" sizes=\"auto, (max-width: 875px) 100vw, 875px\" \/><\/figure>\n\n\n\n<p><strong>Understanding the Code:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>The script uses&nbsp;<code>serial<\/code>&nbsp;library to communicate with BleuIO via AT commands.<\/li>\n\n\n\n<li>While loops ensure connection success and read all available data.<\/li>\n\n\n\n<li>The script parses output and filters empty space to avoid repetitive printing.<\/li>\n<\/ul>\n\n\n\n<p>In this tutorial, we&#8217;ve covered the basics of working with the BleuIO BLE USB dongle on Linux\/MacOS systems. The simplicity of the AT command interface and cross-platform compatibility make BleuIO an excellent choice for BLE application development. Experiment with the provided script, explore additional <a href=\"https:\/\/www.bleuio.com\/getting_started\/docs\/commands\/\" target=\"_blank\" rel=\"noreferrer noopener\">AT commands from BleuIO<\/a>, and unlock the full potential of BLE applications with BleuIO. Happy coding!<\/p>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Bluetooth Low Energy (BLE) technology has become increasingly popular for creating wireless applications with low power consumption. In this tutorial, we&#8217;ll explore the process of scanning for nearby BLE devices, connecting to a specific device, and reading characteristics using the BleuIO BLE USB dongle. The tutorial is designed for Linux\/MacOS environments. Introduction to BleuIO BleuIO [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":568,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1,2],"tags":[],"class_list":["post-558","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-bleuio","category-bleuio-tutorial"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Developing BLE Applications : A Tutorial for Linux\/MacOS - BleuIO - Create Bluetooth Low Energy application<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.bleuio.com\/blog\/developing-ble-applications-a-tutorial-for-linux-mac\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Developing BLE Applications : A Tutorial for Linux\/MacOS - BleuIO - Create Bluetooth Low Energy application\" \/>\n<meta property=\"og:description\" content=\"Bluetooth Low Energy (BLE) technology has become increasingly popular for creating wireless applications with low power consumption. 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