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Apache IoTDB (Database for Internet of Things) is an IoT native database with high performance for data management and analysis, deployable on the edge and the cloud. Due to its light-weight architecture, high performance and rich feature set together with its deep integration with Apache Hadoop, Spark and Flink, Apache IoTDB can meet the requirements of massive data storage, high-speed data ingestion and complex data analysis in the IoT industrial fields. In the scene of factories, there are tens of devices under LAN network. IoTDB can be installed on a local controller server in the factory to receive data from those devices. ...

The IoT Leaf is a small ESP32-based device which can be used as highly flexible power supply, as embedded controller or as a combination of both: it consists of a board which can be cut into two pieces resulting in two different devices or which can be used as one. The board can be powered via solar cell or USB and provides a battery charging function and deep-discharge protection for LiPo batteries. Beside the ESP32 the microcontroller part is prepared for a LoRaWAN and a GPS module. Both together provide a powerful hardware which can be used in many different scenarios. Details and the full specification are available at https://iot.halaser.de This repository contains different firmware-examples and applications which can be used together with this board as well as hardware designs which are free to be used.