Designing A Scalable, Maintainable, Low Power LTE IoT Gateway with La...
summary
Built a $100 gateway (Sentrius MG100) using nRF52840 + Zephyr paired with a Sierra Wireless LTE/NB‑IoT modem and Memfault for observability. Claimed outcomes: maintainable, low‑power, scalable to hundreds–thousands of units, and reduced field visits by enabling Memfault core-dump + metrics remote debugging. Footprints and limits are explicit: baseline SDK ~3.5 KB code / 1.5 KB RAM, Memfault runtime ~16 KB RAM, nine‑byte transfer chunks and even customers on 160 bytes/hour links. Trial deployments (Xylem) validate the approach.
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chapters (10)
- 0:00Start
- 1:25Introduction
- 2:27Iot Devices
- 9:35Recap
- 18:46Core Dump
- 25:21Battery Regressions
- 30:03What Is the Memory Footprint
- 31:00Where Do We Save the Core Dump
- 33:31Do You Sell the Software for the Processing in the Cloud
- 38:25Can You Determine at Runtime Where To Send Messages
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