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1896 lines
36 KiB
HTML
1896 lines
36 KiB
HTML
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<!doctype html>
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<html lang="en" class="no-js">
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<head>
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<meta charset="utf-8">
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<meta name="viewport" content="width=device-width,initial-scale=1">
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<link rel="prev" href="android.html">
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<link rel="icon" href="../images/favicon.ico">
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<meta name="generator" content="mkdocs-1.5.3, mkdocs-material-9.4.5">
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<title>Zephyr - Bumble</title>
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<link rel="stylesheet" href="../assets/stylesheets/main.6a10b989.min.css">
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<link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
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<link rel="stylesheet" href="https://fonts.googleapis.com/css?family=Roboto:300,300i,400,400i,700,700i%7CRoboto+Mono:400,400i,700,700i&display=fallback">
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<style>:root{--md-text-font:"Roboto";--md-code-font:"Roboto Mono"}</style>
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<link rel="stylesheet" href="../assets/_mkdocstrings.css">
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<script>__md_scope=new URL("..",location),__md_hash=e=>[...e].reduce((e,_)=>(e<<5)-e+_.charCodeAt(0),0),__md_get=(e,_=localStorage,t=__md_scope)=>JSON.parse(_.getItem(t.pathname+"."+e)),__md_set=(e,_,t=localStorage,a=__md_scope)=>{try{t.setItem(a.pathname+"."+e,JSON.stringify(_))}catch(e){}}</script>
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</head>
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<body dir="ltr">
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<script>var palette=__md_get("__palette");if(palette&&"object"==typeof palette.color)for(var key of Object.keys(palette.color))document.body.setAttribute("data-md-color-"+key,palette.color[key])</script>
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<input class="md-toggle" data-md-toggle="search" type="checkbox" id="__search" autocomplete="off">
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<label class="md-overlay" for="__drawer"></label>
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<div data-md-component="skip">
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<a href="#zephyr-platform" class="md-skip">
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Skip to content
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<div data-md-component="announce">
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<header class="md-header md-header--shadow" data-md-component="header">
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<nav class="md-header__inner md-grid" aria-label="Header">
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<a href="../index.html" title="Bumble" class="md-header__button md-logo" aria-label="Bumble" data-md-component="logo">
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<img src="../images/logo.png" alt="logo">
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</a>
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<label class="md-header__button md-icon" for="__drawer">
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<div class="md-header__ellipsis">
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<div class="md-header__topic">
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<span class="md-ellipsis">
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Bumble
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</span>
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</div>
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<div class="md-header__topic" data-md-component="header-topic">
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<span class="md-ellipsis">
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Zephyr
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</span>
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</div>
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</div>
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</div>
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<div class="md-header__source">
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<a href="https://github.com/google/bumble" title="Go to repository" class="md-source" data-md-component="source">
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<div class="md-source__icon md-icon">
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<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 448 512"><!--! Font Awesome Free 6.4.2 by @fontawesome - https://fontawesome.com License - https://fontawesome.com/license/free (Icons: CC BY 4.0, Fonts: SIL OFL 1.1, Code: MIT License) Copyright 2023 Fonticons, Inc.--><path d="M439.55 236.05 244 40.45a28.87 28.87 0 0 0-40.81 0l-40.66 40.63 51.52 51.52c27.06-9.14 52.68 16.77 43.39 43.68l49.66 49.66c34.23-11.8 61.18 31 35.47 56.69-26.49 26.49-70.21-2.87-56-37.34L240.22 199v121.85c25.3 12.54 22.26 41.85 9.08 55a34.34 34.34 0 0 1-48.55 0c-17.57-17.6-11.07-46.91 11.25-56v-123c-20.8-8.51-24.6-30.74-18.64-45L142.57 101 8.45 235.14a28.86 28.86 0 0 0 0 40.81l195.61 195.6a28.86 28.86 0 0 0 40.8 0l194.69-194.69a28.86 28.86 0 0 0 0-40.81z"/></svg>
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<div class="md-source__repository">
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GitHub
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</a>
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</nav>
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<div class="md-container" data-md-component="container">
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<main class="md-main" data-md-component="main">
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<nav class="md-nav md-nav--primary" aria-label="Navigation" data-md-level="0">
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<label class="md-nav__title" for="__drawer">
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<a href="../index.html" title="Bumble" class="md-nav__button md-logo" aria-label="Bumble" data-md-component="logo">
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<img src="../images/logo.png" alt="logo">
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</a>
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Bumble
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<a href="https://github.com/google/bumble" title="Go to repository" class="md-source" data-md-component="source">
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<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 448 512"><!--! Font Awesome Free 6.4.2 by @fontawesome - https://fontawesome.com License - https://fontawesome.com/license/free (Icons: CC BY 4.0, Fonts: SIL OFL 1.1, Code: MIT License) Copyright 2023 Fonticons, Inc.--><path d="M439.55 236.05 244 40.45a28.87 28.87 0 0 0-40.81 0l-40.66 40.63 51.52 51.52c27.06-9.14 52.68 16.77 43.39 43.68l49.66 49.66c34.23-11.8 61.18 31 35.47 56.69-26.49 26.49-70.21-2.87-56-37.34L240.22 199v121.85c25.3 12.54 22.26 41.85 9.08 55a34.34 34.34 0 0 1-48.55 0c-17.57-17.6-11.07-46.91 11.25-56v-123c-20.8-8.51-24.6-30.74-18.64-45L142.57 101 8.45 235.14a28.86 28.86 0 0 0 0 40.81l195.61 195.6a28.86 28.86 0 0 0 40.8 0l194.69-194.69a28.86 28.86 0 0 0 0-40.81z"/></svg>
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<div class="md-source__repository">
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GitHub
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<span class="md-ellipsis">
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Introduction
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</a>
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Getting Started
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Development
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Development
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Python Environments
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Contributing
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Code Style
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Use Cases
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Use Cases
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Overview
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Use Case 1
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Use Case 2
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Use Case 3
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Use Case 4
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Use Case 5
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Use Case 6
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Components
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Controller
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Host
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GATT
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Security Manager
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<li class="md-nav__item">
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<a href="../transports/vhci.html" class="md-nav__link">
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VHCI
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</a>
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HCI Socket
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Android Emulator
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</a>
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<span class="md-ellipsis">
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Speaker
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</a>
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HCI Bridge
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</a>
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Golden Gate Bridge
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</a>
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<li class="md-nav__item">
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<span class="md-ellipsis">
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GATT Dump
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</a>
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<li class="md-nav__item">
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<a href="../apps_and_tools/pair.html" class="md-nav__link">
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<span class="md-ellipsis">
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Pair
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</span>
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</a>
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<li class="md-nav__item">
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<a href="../apps_and_tools/unbond.html" class="md-nav__link">
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<span class="md-ellipsis">
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Unbond
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</a>
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</li>
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<li class="md-nav__item">
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<a href="../apps_and_tools/usb_probe.html" class="md-nav__link">
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<span class="md-ellipsis">
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USB Probe
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</a>
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<li class="md-nav__item">
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<a href="../apps_and_tools/link_relay.html" class="md-nav__link">
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<span class="md-ellipsis">
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Link Relay
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</a>
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<span class="md-nav__icon md-icon"></span>
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</label>
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<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_10_label" aria-expanded="false">
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<label class="md-nav__title" for="__nav_10">
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Overview
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<span class="md-ellipsis">
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<h1 id="zephyr-platform"><span class="twemoji"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M17 17H7V7h10m4 4V9h-2V7a2 2 0 0 0-2-2h-2V3h-2v2h-2V3H9v2H7c-1.11 0-2 .89-2 2v2H3v2h2v2H3v2h2v2a2 2 0 0 0 2 2h2v2h2v-2h2v2h2v-2h2a2 2 0 0 0 2-2v-2h2v-2h-2v-2m-6 2h-2v-2h2m2-2H9v6h6V9Z"/></svg></span> ZEPHYR PLATFORM<a class="headerlink" href="#zephyr-platform" title="Permanent link">¶</a></h1>
|
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<h2 id="set-tx-power-on-nrf52840">Set TX Power on nRF52840<a class="headerlink" href="#set-tx-power-on-nrf52840" title="Permanent link">¶</a></h2>
|
|
<p>The Nordic nRF52840 supports Zephyr's vendor specific HCI command for setting TX
|
|
power during advertising, connection, or scanning. With the example <a href="https://docs.zephyrproject.org/latest/samples/bluetooth/hci_usb/README.html">HCI
|
|
USB</a>
|
|
application, an <a href="https://www.nordicsemi.com/Products/Development-
|
|
hardware/nRF52840-Dongle">nRF52840
|
|
dongle</a> can be used as a Bumble controller.</p>
|
|
<p>To add dynamic TX power support to the HCI USB application, add the following to
|
|
<code>zephyr/samples/bluetooth/hci_usb/prj.conf</code> and build.</p>
|
|
<div class="highlight"><pre><span></span><code>CONFIG_BT_CTLR_ADVANCED_FEATURES=y
|
|
CONFIG_BT_CTLR_CONN_RSSI=y
|
|
CONFIG_BT_CTLR_TX_PWR_DYNAMIC_CONTROL=y
|
|
</code></pre></div>
|
|
<p>Alternatively, a prebuilt firmware application can be downloaded here:
|
|
<a href="../downloads/zephyr/hci_usb.zip">hci_usb.zip</a>.</p>
|
|
<p>Put the nRF52840 dongle into bootloader mode by pressing the RESET button. The
|
|
LED should pulse red. Load the firmware application with the <code>nrfutil</code> tool:</p>
|
|
<div class="highlight"><pre><span></span><code>nrfutil dfu usb-serial -pkg hci_usb.zip -p /dev/ttyACM0
|
|
</code></pre></div>
|
|
<p>The vendor specific HCI commands to read and write TX power are defined in
|
|
<code>bumble/vendor/zephyr/hci.py</code> and may be used as such:</p>
|
|
<div class="highlight"><pre><span></span><code><span class="kn">from</span> <span class="nn">bumble.vendor.zephyr.hci</span> <span class="kn">import</span> <span class="n">HCI_Write_Tx_Power_Level_Command</span>
|
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|
|
<span class="c1"># set advertising power to -4 dB</span>
|
|
<span class="n">response</span> <span class="o">=</span> <span class="k">await</span> <span class="n">host</span><span class="o">.</span><span class="n">send_command</span><span class="p">(</span>
|
|
<span class="n">HCI_Write_Tx_Power_Level_Command</span><span class="p">(</span>
|
|
<span class="n">handle_type</span><span class="o">=</span><span class="n">HCI_Write_Tx_Power_Level_Command</span><span class="o">.</span><span class="n">TX_POWER_HANDLE_TYPE_ADV</span><span class="p">,</span>
|
|
<span class="n">connection_handle</span><span class="o">=</span><span class="mi">0</span><span class="p">,</span>
|
|
<span class="n">tx_power_level</span><span class="o">=-</span><span class="mi">4</span><span class="p">,</span>
|
|
<span class="p">)</span>
|
|
<span class="p">)</span>
|
|
|
|
<span class="k">if</span> <span class="n">response</span><span class="o">.</span><span class="n">return_parameters</span><span class="o">.</span><span class="n">status</span> <span class="o">==</span> <span class="n">HCI_SUCCESS</span><span class="p">:</span>
|
|
<span class="nb">print</span><span class="p">(</span><span class="sa">f</span><span class="s2">"TX power set to </span><span class="si">{</span><span class="n">response</span><span class="o">.</span><span class="n">return_parameters</span><span class="o">.</span><span class="n">selected_tx_power_level</span><span class="si">}</span><span class="s2">"</span><span class="p">)</span>
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</code></pre></div>
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