forked from FOSS/BangleApps
46 lines
1.4 KiB
Markdown
46 lines
1.4 KiB
Markdown
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# Bluetooth Heart Rate Monitor
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When this app is installed it overrides Bangle.js's build in heart rate monitor with an external Bluetooth one.
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HRM is requested it searches on Bluetooth for a heart rate monitor, connects, and sends data back using the `Bangle.on('HRM'` event as if it came from the on board monitor.
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This means it's compatible with many Bangle.js apps including:
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* [Heart Rate Widget](https://banglejs.com/apps/#widhrt)
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* [Heart Rate Recorder](https://banglejs.com/apps/#heart)
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It it NOT COMPATIBLE with [Heart Rate Monitor](https://banglejs.com/apps/#hrm)
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as that requires live sensor data (rather than just BPM readings).
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## Usage
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Just install the app, then install an app that uses the heart rate monitor.
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Once installed it'll automatically try and connect to the first bluetooth
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heart rate monitor it finds.
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**To disable this and return to normal HRM, uninstall the app**
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## Compatible Heart Rate Monitors
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This works with any heart rate monitor providing the standard Bluetooth
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Heart Rate Service (`180D`) and characteristic (`2A37`).
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So far it has been tested on:
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* CooSpo Bluetooth Heart Rate Monitor
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## Internals
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This replaces `Bangle.setHRMPower` with its own implementation.
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## TODO
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* Maybe a `bthrm.settings.js` and app (that calls it) to enable it to be turned on and off
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* A widget to show connection state?
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* Specify a specific device by address?
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## Creator
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Gordon Williams
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