Connecting the bean – The bumpy road of BLE on Android

on YouTube ↗21m

" summary

Built an unofficial SDK for the LightBlue Bean and documents concrete Android BLE pitfalls: KitKat’s startLeScan can silently fail and returns a cryptic boolean, scan callbacks are inconsistent across devices, and Lollipop fixes add filtering, batching and low‑power modes but require hardware support (Nexus 5 lacks low‑power). Connection quirks include an unreliable autoconnect flag, pairing triggered only on read, write operations must wait for callbacks, 20‑byte MTU packet assembly, and hard limits of 4 connections on KitKat / 7 on Jelly Bean / 15 on Lollipop.

AI-written summary · about

" chapters (10)

1. 0:00Introduction
2. 1:54BLE basics on Android
3. 3:20Scanning for BLE devices
4. 8:21Lollipop BLE improvements
5. 10:06Connecting to BLE device
6. 12:14Discovering services
7. 14:17Reading and writing characteristics
8. 16:03Setting up notifications
9. 18:16Writing data and packets
10. 19:42Conclusions and learning resources

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