Firmware Updates Over The Air
summary
Claims that LoRaWAN can do secure over‑the‑air firmware upgrades using multicast + fragmentation with LDPC-style FEC, a reference implementation by arm and The Things Network, and a live 25-device multicast demo. Speeds reported: about 220 B/s on SF9 125 kHz, typical 30 kB delta in ~2m30s. Requires OEM-signed images (public key in device, private key air‑gapped), bootloader with rollback, storage and crypto, gateway selection/round‑robin to avoid EU 10% duty-cycle limits; prototype works with mbed components.
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chapters (13)
- 0:00Start
- 4:32During the lifetime of a device...
- 5:55Naive approach
- 6:11Better approach
- 7:54Setting up the device
- 9:44Dealing with low QoS
- 10:05Speed
- 11:22Gateway selection
- 13:04Spectrum usage
- 13:45Link layer security is not enough
- 15:14Update flow
- 16:12Components required
- 18:02Current state
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