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| <h2 id="api-for-btshell-app">API for btshell app</h2> |
| <p>"btshell" is one of the sample applications that come with Mynewt. It is a shell application which provides a basic interface to the host-side of the BLE stack. "btshell" includes all the possible roles (Central/Peripheral) and they may be run simultaneously. You can run btshell on a board and issue commands that make it behave as a central or a peripheral with different peers. </p> |
| <p>"btshell" is a new application that uses Mynewt 1.1 shell features and has updated command and parameter names.</p> |
| <p>Highlighted below are some of the ways you can use the API to establish connections and discover services and characteristics from peer devices. For descriptions of the full API, go to the next sections on <a href="../btshell_GAP/">GAP in btshell</a> and <a href="../btshell_GATT/">GATT in btshell</a>.</p> |
| <p><br></p> |
| <h3 id="set-device-address">Set device address.</h3> |
| <p>On startup, btshell has the following identity address configuration:</p> |
| <ul> |
| <li>Public address: None</li> |
| <li>Random address: None</li> |
| </ul> |
| <p>The below <code>set</code> commands can be used to change the address configuration:</p> |
| <div class="codehilite" style="background: #ffffff"><pre style="line-height: 125%;"><span></span><code>set addr_type=public addr=<device-address> |
| set addr_type=random addr=<device-address> |
| </code></pre></div> |
| |
| <p>For example:</p> |
| <div class="codehilite" style="background: #ffffff"><pre style="line-height: 125%;"><span></span><code>set addr_type=public addr=01:02:03:04:05:06 |
| set addr_type=random addr=c1:aa:bb:cc:dd:ee |
| </code></pre></div> |
| |
| <p>The address configuration can be viewed with the <code>gatt-show-addr</code> command, as follows:</p> |
| <div class="codehilite" style="background: #ffffff"><pre style="line-height: 125%;"><span></span><code>gatt-show-addr |
| public_id_addr=01:02:03:04:05:06 random_id_addr=c1:aa:bb:cc:dd:ee |
| </code></pre></div> |
| |
| <p><br></p> |
| <h3 id="initiate-a-direct-connection-to-a-device">Initiate a direct connection to a device</h3> |
| <p>In this case, your board is acting as a central and initiating a connection with another BLE device. The example assumes you know the address of the peer, either by scanning for available peers or because you have set up the peer yourself.</p> |
| <div class="codehilite" style="background: #ffffff"><pre style="line-height: 125%;"><span></span><code><span style="background-color: #ffffcc">connect peer_addr=d4:f5:13:53:d2:43 |
| </span>connection established; handle=1 our_ota_addr_type=0 our_ota_addr=0a:0b:0c:0d:0e:0f out_id_addr_type=0 our_id_addr=0a:0b:0c:0d:0e:0f peer_addr_type=0 peer_addr=43:d2:53:13:f5:d4 conn_itvl=40 conn_latency=0 supervision_timeout=256 encrypted=0 authenticated=0 bonded=0 |
| </code></pre></div> |
| |
| <p>The <code>handle=1</code> in the output indicates that it is connection-1.</p> |
| <p><br></p> |
| <h3 id="configure-advertisements-to-include-device-name">Configure advertisements to include device name</h3> |
| <p>In this case, your board is acting as a peripheral. </p> |
| <div class="codehilite" style="background: #ffffff"><pre style="line-height: 125%;"><span></span><code>set-adv-data name=<your-device-name> |
| </code></pre></div> |
| |
| <p><br></p> |
| <h3 id="begin-sending-undirected-general-advertisements">Begin sending undirected general advertisements</h3> |
| <p>In this case, your board is acting as a peripheral. </p> |
| <div class="codehilite" style="background: #ffffff"><pre style="line-height: 125%;"><span></span><code>advertise conn=und discov=gen |
| </code></pre></div> |
| |
| <p><br></p> |
| <h3 id="show-established-connections">Show established connections.</h3> |
| <div class="codehilite" style="background: #ffffff"><pre style="line-height: 125%;"><span></span><code>gatt-show-conn |
| </code></pre></div> |
| |
| <p><br></p> |
| <h3 id="discover-and-display-peers-services-characteristics-and-descriptors">Discover and display peer's services, characteristics, and descriptors.</h3> |
| <p>This is how you discover and then display the services of the peer you established earlier across connection-1.</p> |
| <div class="codehilite" style="background: #ffffff"><pre style="line-height: 125%;"><span></span><code><span style="background-color: #ffffcc">gatt-discover-full conn=1 |
| </span><span style="background-color: #ffffcc">gatt-show |
| </span>[ts=132425ssb, mod=64 level=2] CONNECTION: handle=1 addr=d4:f5:13:53:d2:43 |
| [ts=132428ssb, mod=64 level=2] start=1 end=5 uuid=0x1800 |
| [ts=132433ssb, mod=64 level=2] start=6 end=16 uuid=0x1808 |
| [ts=132437ssb, mod=64 level=2] start=17 end=31 uuid=0x180a |
| [ts=132441ssb, mod=64 level=2] start=32 end=65535 uuid=00000000-0000-1000-1000000000000000 |
| </code></pre></div> |
| |
| <p><br></p> |
| <h3 id="read-an-attribute-belonging-to-the-peer">Read an attribute belonging to the peer</h3> |
| <div class="codehilite" style="background: #ffffff"><pre style="line-height: 125%;"><span></span><code>gatt-read conn=1 attr=21 |
| </code></pre></div> |
| |
| <p><br></p> |
| <h3 id="write-to-an-attribute-belonging-to-the-peer">Write to an attribute belonging to the peer</h3> |
| <div class="codehilite" style="background: #ffffff"><pre style="line-height: 125%;"><span></span><code>gatt-write conn=1 attr=3 value=0x01:0x02:0x03 |
| </code></pre></div> |
| |
| <p><br></p> |
| <h3 id="perform-a-passive-scan">Perform a passive scan</h3> |
| <p>This is how you tell your board to listen to all advertisements around it. The duration is specified in ms.</p> |
| <div class="codehilite" style="background: #ffffff"><pre style="line-height: 125%;"><span></span><code>scan duration=1000 passive=1 filter=no_wl |
| </code></pre></div> |
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