TL;DR
Flash Bee is a DIY handheld lightning detector that you can build using widely available components, including the XIAO ESP32-C3 Wi-Fi and Bluetooth board, a 1.28-inch round touchscreen display, and an AMS AS3935 Franklin lightning sensor. The design is compact and user-friendly, featuring a 3D-printed enclosure that makes it easy to assemble. The AS3935 sensor is capable of detecting lightning strikes up to 40 kilometers away with an accuracy of about one kilometer.