{"id":1720,"date":"2026-08-06T15:09:05","date_gmt":"2026-08-06T15:09:05","guid":{"rendered":"https:\/\/www.bleuio.com\/blog\/?p=1720"},"modified":"2026-08-07T10:02:06","modified_gmt":"2026-08-07T10:02:06","slug":"turn-an-rp2040-or-rp2350-board-into-a-hibouair-gateway-with-bleuio","status":"publish","type":"post","link":"https:\/\/www.bleuio.com\/blog\/turn-an-rp2040-or-rp2350-board-into-a-hibouair-gateway-with-bleuio\/","title":{"rendered":"Turn an RP2040 or RP2350 Board into a HibouAir Gateway with BleuIO"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">In this tutorial, we will look at how the <strong>BleuIO USB dongle<\/strong> can add Bluetooth Low Energy communication to an RP2040 or RP2350 development board.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The project uses the open-source <strong>Pico I\/O Bridge<\/strong> firmware. It allows a supported development board to work as a USB host for BleuIO. BleuIO scans nearby HibouAir sensors, and the board displays the latest sensor data through a simple browser interface.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The board also creates a small USB network connection with the computer. This means the dashboard can be opened directly in a web browser without installing a desktop application or connecting the board to Wi-Fi. The firmware is written in Rust and exposes its interfaces through a local <code>.local<\/code> address.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This project is a useful example of how BleuIO can provide BLE communication to development boards that do not have built-in Bluetooth. The board handles USB hosting and networking, while BleuIO handles Bluetooth scanning.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Requirements<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">You will need:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong><a href=\"https:\/\/bleuio.com\/bluetooth-low-energy-usb-ssd025.php\" target=\"_blank\" rel=\"noreferrer noopener\">BleuIO USB dongle<\/a><\/strong><\/li>\n\n\n\n<li>One or more <strong><a href=\"https:\/\/www.hibouair.com\/air-quality-monitor-hibouair-duo.php\" target=\"_blank\" rel=\"noreferrer noopener\">HibouAir sensors<\/a><\/strong><\/li>\n\n\n\n<li>A supported board with a USB host connection:\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/learn.adafruit.com\/adafruit-feather-rp2040-with-usb-type-a-host\/overview\" target=\"_blank\" rel=\"noreferrer noopener\">Adafruit Feather RP2040 USB Host<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/www.waveshare.com\/rp2350-usb-a.htm?srsltid=AfmBOopxvSedfA8k-5WJd-8CsfxLMw2uoI7tVmu5Eq43ppc92--lhxGY\" target=\"_blank\" rel=\"noreferrer noopener\">Waveshare RP2350 USB-A<\/a><\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>A USB data cable for connecting the board to your computer<\/li>\n\n\n\n<li>A computer with a modern web browser<\/li>\n\n\n\n<li>The Pico I\/O Bridge firmware<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">What Does This Project Do?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The project creates a simple connection between HibouAir sensors, BleuIO and your computer.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">1. HibouAir broadcasts sensor data<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">HibouAir sensors regularly broadcast their measurements using Bluetooth Low Energy advertising packets.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Depending on the HibouAir model, these broadcasts can contain parameters such as: Temperature, Humidity, Pressure, CO2, VOC, Noise, PM1.0, PM2.5, PM10, Ambient light<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Because the project reads BLE advertising data, the HibouAir sensors do not need to be paired with the development board.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">2. BleuIO receives the BLE advertisements<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">BleuIO is connected to the USB-A host port of the development board.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">After BleuIO is detected, the firmware manages the scanning process automatically. BleuIO searches for nearby HibouAir advertisements and sends the received data to the board.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This is an important part of the project: the RP2040 or RP2350 board does not need its own Bluetooth radio. BleuIO provides the Bluetooth Low Energy functionality through USB.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">3. The board decodes the HibouAir data<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">The firmware reads the BLE scan results from BleuIO and decodes the HibouAir manufacturer data.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">It identifies the HibouAir sensor ID and sensor type before extracting the measurements supported by that particular model.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The firmware keeps the latest readings for up to eight HibouAir sensors in memory. When no sensor filter has been configured, sensors are discovered automatically.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">4. The results appear in a web browser<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">The development board appears on the computer as a small USB Ethernet device. It provides its own local IP network and advertises a unique <code>.local<\/code> hostname.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The browser dashboard shows: BleuIO connection status, USB transfer status, Number of HibouAir sensors discovered, HibouAir sensor IDs, Sensor types, Latest measurements, Time since the last advertisement, Number of reports received<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The dashboard updates automatically while BleuIO continues scanning.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">How to Run the Project<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The complete project is available on GitHub:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/github.com\/ulso\/pico-io-bridge\" target=\"_blank\" rel=\"noreferrer noopener\">Pico I\/O Bridge GitHub repository<\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">There are two ways to run it:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Flash a pre-built firmware file.<\/li>\n\n\n\n<li>Build the firmware from the Rust source code.<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">Using a pre-built firmware file is the easiest method.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Method 1: Use the Pre-Built Firmware<\/h2>\n\n\n\n<h4 class=\"wp-block-heading\">Step 1: Download the firmware<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">Open the project\u2019s release page:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/github.com\/ulso\/pico-io-bridge\/releases\/tag\/v0.2.0\" target=\"_blank\" rel=\"noreferrer noopener\">Pico I\/O Bridge v0.2.0 release<\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The release contains pre-built UF2 firmware files for the supported board profiles, together with a checksum file.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Download the UF2 file that matches your board.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For this project, select the firmware for either:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>Adafruit Feather RP2040 USB Host<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">or:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>Waveshare RP2350 USB-A<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Do not flash firmware intended for a different board model.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Step 2: Put the board into bootloader mode<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">Disconnect the board from the computer.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Put the board into its normal UF2 or BOOTSEL flashing mode. The exact button combination depends on the board, so follow the normal bootloader procedure for your development board.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">When the board enters bootloader mode, it should appear on the computer as a removable USB drive.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Step 3: Flash the UF2 file<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">Copy the downloaded UF2 file to the board\u2019s removable drive.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The board should restart automatically after the file has been copied.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Wait a few seconds for the firmware to start and for the USB network connection to become available.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Step 4: Connect BleuIO<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">Insert the BleuIO USB dongle into the USB-A host port of the development board.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The physical connection should look like this:<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"986\" height=\"480\" src=\"https:\/\/www.bleuio.com\/blog\/wp-content\/uploads\/2026\/08\/image-1.png\" alt=\"\" class=\"wp-image-1729\" srcset=\"https:\/\/www.bleuio.com\/blog\/wp-content\/uploads\/2026\/08\/image-1.png 986w, https:\/\/www.bleuio.com\/blog\/wp-content\/uploads\/2026\/08\/image-1-300x146.png 300w, https:\/\/www.bleuio.com\/blog\/wp-content\/uploads\/2026\/08\/image-1-768x374.png 768w\" sizes=\"auto, (max-width: 986px) 100vw, 986px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Do not connect BleuIO directly to the computer for this setup. It needs to be connected to the USB host port on the development board.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Step 5: Power the HibouAir sensors<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">Make sure your HibouAir sensors are powered on and located within Bluetooth range of BleuIO.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">No Bluetooth pairing process is required. The sensors simply need to be broadcasting their normal BLE advertisement data.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Step 6: Find the board hostname<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">Each board creates a unique <code>.local<\/code> hostname.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For the Adafruit Feather RP2040 USB Host, it will follow this format:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>pico-io-usb-host-xxxxxx.local<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">For the Waveshare RP2350 USB-A, it will follow this format:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>pico-io-waveshare-rp2350-xxxxxx.local<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Replace <code>xxxxxx<\/code> with the unique identifier assigned to your board.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">On macOS, the board can also be discovered through the built-in <code>dns-sd<\/code> utility:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>dns-sd -B _http._tcp<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">The project advertises its web interface through mDNS and DNS Service Discovery.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">On Windows, the optional <a href=\"https:\/\/apps.microsoft.com\/detail\/9n074hxzcmtl?hl=en-GB&amp;gl=SE\" target=\"_blank\" rel=\"noreferrer noopener\">mDNS Discovery utility<\/a> can be used to view available mDNS and DNS-SD services.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Step 7: Open the web interface<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">Open a browser and enter the board hostname.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For example:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>http:&#47;&#47;pico-io-usb-host-244c29.local\/usb-host.html<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Use your board\u2019s actual hostname rather than the example above.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The USB-host-enabled profiles expose the USB status page at:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/usb-host.html<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">The web interface and the USB-host API are included whenever the firmware is built with the <code>pio-usb-host<\/code> feature.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Step 8: Wait for BleuIO to become ready<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">After opening the page, check the USB section.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">You should see a status similar to:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>BleuIO Ready<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">You should also see:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>BleuIO HibouAir scanner ready<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Once BleuIO is ready, the managed HibouAir scan begins automatically.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Nearby HibouAir sensors should start appearing as individual cards. The first results may take a few seconds, depending on the sensors\u2019 advertisement intervals.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Expected Output<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The page should show each discovered HibouAir sensor with its sensor ID, sensor model and latest measurements.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"798\" src=\"https:\/\/www.bleuio.com\/blog\/wp-content\/uploads\/2026\/08\/image-1024x798.png\" alt=\"\" class=\"wp-image-1723\" srcset=\"https:\/\/www.bleuio.com\/blog\/wp-content\/uploads\/2026\/08\/image-1024x798.png 1024w, https:\/\/www.bleuio.com\/blog\/wp-content\/uploads\/2026\/08\/image-300x234.png 300w, https:\/\/www.bleuio.com\/blog\/wp-content\/uploads\/2026\/08\/image-768x598.png 768w, https:\/\/www.bleuio.com\/blog\/wp-content\/uploads\/2026\/08\/image-1536x1196.png 1536w, https:\/\/www.bleuio.com\/blog\/wp-content\/uploads\/2026\/08\/image-2048x1595.png 2048w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Method 2: Build the Firmware from Source<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Developers can also clone the complete project and build the firmware using Rust.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Clone the repository:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>git clone https:\/\/github.com\/ulso\/pico-io-bridge.git\ncd pico-io-bridge<\/code><\/pre>\n\n\n\n<h4 class=\"wp-block-heading\">Build for the Adafruit Feather RP2040 USB Host<\/h4>\n\n\n\n<pre class=\"wp-block-code\"><code>cargo build --locked --release \\\n  --no-default-features \\\n  --features board-adafruit-rp2040-usb-host<\/code><\/pre>\n\n\n\n<h4 class=\"wp-block-heading\">Build for the Waveshare RP2350 USB-A<\/h4>\n\n\n\n<pre class=\"wp-block-code\"><code>cargo build --locked --release \\\n  --target thumbv8m.main-none-eabihf \\\n  --no-default-features \\\n  --features board-waveshare-rp2350-usb-a<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">The RP2040 and RP2350 profiles use different Rust target configurations, so it is important to use the command intended for your board.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">With the board in BOOTSEL mode, the project can also be built and flashed using the appropriate <code>cargo run<\/code> command. The repository contains the full toolchain and flashing details for developers who want to modify the firmware.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The complete source code, build instructions and examples are available in the <a href=\"https:\/\/github.com\/ulso\/pico-io-bridge\" target=\"_blank\" rel=\"noreferrer noopener\">Pico I\/O Bridge GitHub repository<\/a>. Additional project screenshots can be found in the <a href=\"https:\/\/github.com\/ulso\/pico-io-bridge\/wiki\" target=\"_blank\" rel=\"noreferrer noopener\">Pico I\/O Bridge Wiki<\/a>.<br><\/p>\n","protected":false},"excerpt":{"rendered":"<p>In this tutorial, we will look at how the BleuIO USB dongle can add Bluetooth Low Energy communication to an RP2040 or RP2350 development board. The project uses the open-source Pico I\/O Bridge firmware. It allows a supported development board to work as a USB host for BleuIO. BleuIO scans nearby HibouAir sensors, and the [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":1727,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1,2],"tags":[],"class_list":["post-1720","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 v28.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Turn an RP2040 or RP2350 Board into a HibouAir Gateway with BleuIO - 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\/turn-an-rp2040-or-rp2350-board-into-a-hibouair-gateway-with-bleuio\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Turn an RP2040 or RP2350 Board into a HibouAir Gateway with BleuIO - BleuIO - Create Bluetooth Low Energy application\" \/>\n<meta property=\"og:description\" content=\"In this tutorial, we will look at how the BleuIO USB dongle can add Bluetooth Low Energy communication to an RP2040 or RP2350 development board. The project uses the open-source Pico I\/O Bridge firmware. It allows a supported development board to work as a USB host for BleuIO. 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