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{{Tool Infobox|Related topics=Heart rate, Location tracking, Activity tracking}}
{{Tool Infobox|Related topics=Heart rate, Location tracking, Activity tracking}}
The '''Bangle.js'''<ref>https://banglejs.com/</ref> is the name of a series of [[Open Source Device|open source]] smartwatches that are made by [[Espruino]] under the leadership by Gordon Williams, who also designed the [[Puck.js]] open source hardware that can be used as a [[One Button Tracker]].
The '''Bangle.js''' is the name of a series of open source smartwatches that are made by [[Espruino]] under the leadership by Gordon Williams, who also designed the [[Puck.js]] open source hardware that can be used as a [[One Button Tracker]].
A unique feature of the Bangle.js watches is that users can program their own apps for the devices in the JavaScript programming language and can deploy them on their own watch without having to go through any closed app store model. Furthermore, as the Bluetooth connection for the devices work through web-browser based connections, they all happen client-side, so no data is send to third parties.
A unique feature of the Bangle.js watches is that users can program their own apps for the devices in the JavaScript programming language and can deploy them on their own watch without having to go through any closed app store model. Furthermore, as the Bluetooth connection for the devices work through web-browser based connections, they all happen client-side, so no data is send to third parties.
=== Documentation ===
=== Documentation ===
The websites for the [http://www.espruino.com/Bangle.js Bangle.js 1] and [http://www.espruino.com/Bangle.js2 Bangle.js 2] provide a detailed documentation on how to use the different features that come on-board the devices out of the box, as well as tutorials and documentation for how to program the devices to access the sensors in different ways.
The websites for the [http://www.espruino.com/Bangle.js Bangle.js 1] and [http://www.espruino.com/Bangle.js2 Bangle.js 2] provide a detailed documentation on how to use the different features that come on-board the devices out of the box, as well as tutorials and documentation for how to program the devices to access the sensors in different ways.
== Using the Bangle.js ==
=== Collecting heart rate and step data ===
For the v2 of the Bangle.js, a ''Health Tracking'' app ([https://github.com/espruino/BangleApps/tree/master/apps/health see source code]) comes pre-installed on the device. It logs health data to the device every 10 minutes. The data can be [https://banglejs.com/apps/? downloaded through the Bangle.js App Loader]. By default the heart rate tracking is not enabled, instead it will record all HR measurements made by other apps on the device. Alternatively, the automatic in-health-tracking heart rate recording can be enabled in the app settings.
=== Using gesture recognition ===
There is currently no 'default' app that can handle the training of gestures or keep record for when gestures occurred. The ''Gesture Test'' app in the ''Bangle.js App Loader'' comes with some pre-trained models to predict swiping left/right, clapping and a few other gestures. Paul Cockrell [https://paulcockrell.github.io/banglejs-tensorflow-example/ made a small demo web page] which you can use to train models for your own gestures, but requires staying connected to the website.
== Availability ==
== Availability ==
The Bangle.js is available directly through the [https://shop.espruino.com/banglejs2 Espruino shop which ships the devices from the UK] for around 75 GBP. As deliveries to outside the UK incur taxes and customs duties, the website also [http://www.espruino.com/Order#banglejs2 lists some international distributors] that are located within the European Union and the USA.
The Bangle.js is available directly through the [https://shop.espruino.com/banglejs2 Espruino shop which ships the devices from the UK] for around 75 GBP. As deliveries to outside the UK incur taxes and customs duties, the website also [http://www.espruino.com/Order#banglejs2 lists some international distributors] that are located within the European Union and the USA.
[[Category:Tools]]
[[Category:Tools]][[Category:Hardware]][[Category:Fitness and heart rate tracking tools]][[Category:Open source tools]]