Communication Seam Blue Open Chirp Nabeel Nasir Seam

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Communication: Seam. Blue, Open. Chirp Nabeel Nasir

Communication: Seam. Blue, Open. Chirp Nabeel Nasir

Seam. Blue Without Seam. Blue After displacement, need to • manually identify new gateway

Seam. Blue Without Seam. Blue After displacement, need to • manually identify new gateway • pair • reconnect to new gateway • “mobile” peripheral BLE device • connection migration between gateways

Seam. Blue Pros Cons Super useful for applications with wearable devices Static analysis to

Seam. Blue Pros Cons Super useful for applications with wearable devices Static analysis to get state – hacky Maintenance headache No modification of the Io. T device code How do they find movement speed and direction of device? Turn off device and turn on at another place? Access Address impersonation Hard to troubleshoot issues? Pair to all devices and then do auto-reconnect when out of range

Seam. Blue - OS Concepts GW - Seam. Blue app on Android OS Multi-tasking

Seam. Blue - OS Concepts GW - Seam. Blue app on Android OS Multi-tasking Read BLE packets and process for normal operation Check for movement of peripheral device Pairing state migration Connection migration Virtualization BLE radio Wi-Fi/LTE radio for connection transfer to other gateways Use of timers for evaluation of connection transfer Link Layer packet loss calculation

Open. Chirp • Low-power, Wide Area Network • Collaborative telemetry • Lo. Ra. Bug

Open. Chirp • Low-power, Wide Area Network • Collaborative telemetry • Lo. Ra. Bug end-devices + Lo. Ra. WAN protocol + Pub. Sub server + Goodies = Open. Chirp

Open. Chirp Pros Cons Open source design No comparison with other open LPWANs Remotely

Open. Chirp Pros Cons Open source design No comparison with other open LPWANs Remotely registering, managing, and extracting data from the devices Deep-sleep current of Semtech chip from 20 u. A to 287 n. A Amazing battery life (years on 2 AA batteries) + “km” scale range Design choices not explained CC 2560 MCU Semtech SX 1276 Lo. Ra radio TI-RTOS

Open. Chirp - OS Concepts Gateway devices Watchdog timer for reset (remote deployment) Full-fledged

Open. Chirp - OS Concepts Gateway devices Watchdog timer for reset (remote deployment) Full-fledged network stack Lo. Ra. Bug device Configurable kernel Minimal multi-tasking kernel Complete network-enabled environment supporting low-energy operations

Discussion Lo. Ra vs BLE Seam. Blue, Open. Chirp, ….

Discussion Lo. Ra vs BLE Seam. Blue, Open. Chirp, ….