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Firmware updates over the air using LoRaWAN - The Things Conference 2018
This document discusses firmware updates over the air using LoRaWAN. It describes the challenges of updating devices over a 10 year lifetime when requirements and vulnerabilities change. It proposes using multicast sessions, where the gateway transmits firmware fragments to all devices simultaneously using common encryption keys. It outlines the components needed for over-the-air firmware updates, including a bootloader, cryptography, storage drivers and an update client. Mbed OS is presented as a solution that provides these components to support updates on devices with 32kB RAM. Current standardization efforts and an open source reference implementation are also mentioned.
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Firmware updates over the air using LoRaWAN - The Things Conference 2018
- 1. Firmware updates overthe air using LoRaWAN Jan Jongboom The Things Conference 1 February 2018
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- 3. © 2018 Arm Limited 3 IoT deployments target 10 years lifetime But 10 yearsis a really long time!
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- 9. © 2018 Arm Limited 9 Naive approach TX RX TXRX TX RX Firmware fragment Very inefficient! Device 1 TX RX TX RX TX RX Device 2
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- 11. © 2018 Arm Limited 11 But... how do we do this? 1. Instruct devices to use a new set of keys (same for everyone). 2. Instruct devices to wake up at the same time. 3.Gateway can transmit to all devices with one message. Problem: low QoS and uni-directional
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