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    Öğe
    Hibrit enerji hasadı ile çalışan nesnelerin interneti tabanlı kablosuz veri kaydedici tasarımı
    (Hitit Üniversitesi, 2026) Burkaz, Umut; Kapucu, Nuri
    In this thesis study, a hybrid data logger combining Solar and Radio Frequency (RF) energy has been designed to address the energy continuity problem of Wireless Sensor Networks deployed in rural or central areas. Aiming to overcome the maintenance challenges of traditional battery-based systems, this design features a high-performance ESP32 microcontroller and a long-range LoRa communication module at its core. The power management architecture is built upon the MPPT-based CN3791 IC, which ensures maximum efficiency from photovoltaic panels, and the AEM30940 RF energy harvesting module, which supports the system by recovering ambient electromagnetic waves. Thanks to this hybrid topology, the continuous operation of the system is guaranteed by the activation of the RF unit in cases where solar energy is insufficient. Experimental tests confirmed that the system is capable of storing energy even at low irradiance levels such as 100 W/m², and that the RF unit extends battery life by waking up at microwatt-level input powers. Furthermore, with the offline-first software algorithm developed to ensure data integrity, data is recorded to a local SD card during connection disruptions and synchronized with the cloud server once the connection is re-established. The obtained results demonstrate that the proposed system offers an autonomous, reliable, and sustainable solution for industrial and agricultural IoT applications by overcoming the energy bottleneck.