A Node.js BLE (Bluetooth Low Energy) central module.
Want to implement a peripheral? Checkout bleno
Note: macOS / Mac OS X, Linux, FreeBSD and Windows are currently the only supported OSes. Other platforms may be developed later on.
sudo apt-get install bluetooth bluez libbluetooth-dev libudev-dev
node is on your path, if it's not, some options:
sudo ln -s /usr/bin/nodejs /usr/bin/node
sudo yum install bluez bluez-libs bluez-libs-devel
Make sure you have GNU Make:
sudo pkg install gmake
Disable automatic loading of the default Bluetooth stack by putting no-ubt.conf into
/usr/local/etc/devd/no-ubt.conf and restarting devd (
sudo service devd restart).
ng_ubt kernel module if already loaded:
sudo kldunload ng_ubt
Make sure you have read and write permissions on the
/dev/usb/* device that corresponds to your Bluetooth adapter.
This limit is imposed upon by the Bluetooth adapter hardware as well as it's firmware.
|OS X 10.11 (El Capitan)||6|
|Linux/Windows - Adapter dependent||5 (CSR based adapter)|
Some BLE adapters like Sena UD-100 (Cambridge Silicon Radio, Ltd Bluetooth Dongle (HCI mode)) cannot connect to a peripheral while they are scanning. You will get the following message when trying to connect :
Error: Command disallowed
You need to stop scanning before trying to connect in order to solve this issue.
npm install noble
var noble = ;
noble; // any service UUID, no duplicatesnoble; // any service UUID, allow duplicatesvar serviceUUIDs = "<service UUID 1>" ...; // default:  => allvar allowDuplicates = <false|true>; // default: falsenoble; // particular UUID's
noble.state must be
poweredOn before scanning is started.
noble.on('stateChange', callback(state)); can be used register for state change events.
peripheral; // any service UUIDvar serviceUUIDs = "<service UUID 1>" ...;peripheral; // particular UUID's
var serviceUUIDs = "<service UUID 1>" ...;var characteristicUUIDs = "<characteristic UUID 1>" ...;peripheral;
service; // any service UUIDvar serviceUUIDs = "<service UUID 1>" ...;service; // particular UUID's
service // any characteristic UUIDvar characteristicUUIDs = "<characteristic UUID 1>" ...;service; // particular UUID's
characteristic; // data is a buffer, withoutResponse is true|false
false: send a write request, used with "write" characteristic property
true: send a write command, used with "write without response" characteristic property
characteristic; // broadcast is true|false
'data'events when peripheral sends an notification or indication
descriptor; // data is a buffer
See Node.js EventEmitter docs for more info. on API's.
state = <"unknown" | "resetting" | "unsupported" | "unauthorized" | "poweredOff" | "poweredOn">noble;
The event is emitted when scanning is started or if another application enables scanning or changes scanning settings.
The event is emitted when scanning is stopped or if another application stops scanning.
peripheral =id: "<id>"address: "<BT address"> // Bluetooth Address of device, or 'unknown' if not knownaddressType: "<BT address type>" // Bluetooth Address type (public, random), or 'unknown' if not knownconnectable: <connectable> // true or false, or undefined if not knownadvertisement:localName: "<name>"txPowerLevel: <int>serviceUuids: "<service UUID>" ...serviceSolicitationUuid: "<service solicitation UUID>" ...manufacturerData: <Buffer>serviceData:uuid: "<service UUID>"data: <Buffer>...rssi: <rssi>;noble;
Note: on OS X the address will be set to 'unknown' if the device has not been connected previously.
characteristic =uuid: "<uuid>"// properties: 'broadcast', 'read', 'writeWithoutResponse', 'write', 'notify', 'indicate', 'authenticatedSignedWrites', 'extendedProperties'properties: ...;service;
Emitted when characteristic read has completed, result of
characteristic.read(...) or characteristic value has been updated by peripheral via notification or indication - after having been enabled with
characteristic;characteristic; // legacy
Emitted when characteristic write has completed, result of
Emitted when characteristic broadcast state changes, result of
Emitted when characteristic notification state changes, result of
descriptor =uuid: '<uuid>';characteristic;
Run the following command:
sudo setcap cap_net_raw+eip $(eval readlink -f `which node`)
This grants the
cap_net_raw privileges, so it can start/stop BLE advertising.
Note: The above command requires
setcap to be installed, it can be installed using the following:
sudo apt-get install libcap2-bin
su -c \'yum install libcap2-bin\'
hci0 is used by default to override set the
NOBLE_HCI_DEVICE_ID environment variable to the interface number.
sudo NOBLE_HCI_DEVICE_ID=1 node <your file>.js
By default noble waits for both the advertisement data and scan response data for each Bluetooth address. If your device does not use scan response the following environment variable can be used to bypass it.
sudo NOBLE_REPORT_ALL_HCI_EVENTS=1 node <your file>.js
By default noble will respond with an error whenever a GATT request message is received. If your intention is to use bleno in tandem with noble, the following environment variable can be used to bypass this functionality. Note: this requires a Bluetooth 4.1 adapter.
sudo NOBLE_MULTI_ROLE=1 node <your file>.js
By default, noble will select bindings to communicate with Bluetooth devices depending on your platform. If you prefer to specify what bindings noble should use:
var noble = ;
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Copyright (C) 2015 Sandeep Mistry email@example.com
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