Engineering Blog
IoT Engineering Notes from e.FM
Practical articles on low-power IoT design, LoRaWAN, MQTT, ESP32 and solar-powered devices.
How to Size a Solar Panel and Battery for a LoRaWAN Sensor Node
A step-by-step power budget for a solar-powered LoRaWAN node: daily charge, battery, panel rating, and the design choices that change the result most.
Read article →MQTT Topic Design for IoT Fleets: A Practical Naming Scheme
A topic hierarchy for fleets of devices across sites and customers, with rules for status, commands, QoS, payloads and access control.
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