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advertising [2019/02/11 15:23] admin |
advertising [2019/05/02 09:18] admin |
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| Bluetooth devices typically advertise every 100ms to 1sec. For [[beacons|beacons]], this is configurable. The advertising only takes of the order of 1 or 2 milliseconds so that most of time the device is not advertising. This conserves power and is one of the strategies behind Bluetooth LE's low power. | Bluetooth devices typically advertise every 100ms to 1sec. For [[beacons|beacons]], this is configurable. The advertising only takes of the order of 1 or 2 milliseconds so that most of time the device is not advertising. This conserves power and is one of the strategies behind Bluetooth LE's low power. | ||
| - | Most devices send up to 37 bytes allowed in Bluetooth 4.x. Bluetooth 5.x can hold up to 255 bytes of data and packets can be chained to allows for larger payloads up to 1650 bytes. These sizes are still small and contribute to the advertising being short and using low power. | + | Most devices send up to 37 bytes allowed in Bluetooth 4.x. Bluetooth 5.x can hold up to 255 bytes of data and packets can be chained to allow for larger payloads up to 1650 bytes. These sizes are still small and contribute to the advertising being short and using low power. |
| [[https://www.beaconzone.co.uk/blog/beacon-advertising-cheat-sheet/|Beacon Advertising Cheat Sheet]]\\ | [[https://www.beaconzone.co.uk/blog/beacon-advertising-cheat-sheet/|Beacon Advertising Cheat Sheet]]\\ | ||
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| [[https://www2.informatik.hu-berlin.de/~zubow/ble_jamming_talk_cscn_v2.pdf|On Practical Selective Jamming of Bluetooth Low Energy Advertising]]\\ | [[https://www2.informatik.hu-berlin.de/~zubow/ble_jamming_talk_cscn_v2.pdf|On Practical Selective Jamming of Bluetooth Low Energy Advertising]]\\ | ||
| [[https://devzone.nordicsemi.com/tutorials/b/bluetooth-low-energy/posts/ble-advertising-a-beginners-tutorial|Bluetooth low energy Advertising, a beginner's tutorial]]\\ | [[https://devzone.nordicsemi.com/tutorials/b/bluetooth-low-energy/posts/ble-advertising-a-beginners-tutorial|Bluetooth low energy Advertising, a beginner's tutorial]]\\ | ||
| + | [[https://reelyactive.github.io/advlib/|advlib: an open library for wireless advertising packets]]\\ | ||
advertising.txt · Last modified: 2022/02/08 10:33 by admin