In this article, the hardware validation and power optimization of the Autonomous Sensor Node v2.0 are presented, expanding on the previous article on the system architecture. The focus is on real-world power measurements, schematic refinements, and PCB integration that significantly reduce idle and active current consumption. The new design achieves standby currents as low as 18 µA with the timer setup, extending battery life and improving long-term reliability. Compared to an earlier modular version, this integrated system is more compact, efficient, and ready for long-term autonomous field deployment.

Sensor Node Journey

The journey toward an autonomous, long-life LoRaWAN sensor node began with the modular build described in an article of 2024, which used a Seeed Studio XIAO ESP32-C3, a LoRa E5 module, and separate solar management and sensing boards. That project successfully demonstrated remote environmental monitoring and soil moisture sensing, complete integration with The ...