Every Millimetre Is Spoken For in a 2.4 mm BLE Logging Card
A sealed logging card is a thickness problem before it is an electronics problem. Every subsystem sits downstream of one decision: how the millimetr…
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Building an Industrial HMI and Edge Controller on STM32 with FreeRTOS and Modbus TCP
Building an Industrial HMI and Edge Controller on STM32 with FreeRTOS and Modbus TCP Industrial control demos are often judged by the screen. The mo…
Device Tree Ownership Is Moving Up Into Firmware
On most embedded Linux products the kernel carries the description of the board. Under Arm's SystemReady Devicetree band it does not: the platform f…
Thermoelectric Energy Harvesting for Batteryless IoT Sensors
Industrial motors continuously reject energy as heat. Under the right conditions, a small part of that heat can power the sensor used to monitor the…
Secure BLE OTA Firmware Updates on nRF5340: Architecture Notes
Firmware updates are one of the places where an embedded prototype either becomes maintainable or becomes expensive to support. The hard part is not…
Secure Firmware Updates with a Secure Element: Building Trust Into the Bootloader
Imagine your embedded device is deployed somewhere in the field - a smart meter, an industrial sensor, a vehicle ECU. You find a critical bug. You p…