Candle box

Description

Candle MatrixA smart ambient light device based on a 9×16 LED matrix that simulates a flickering candle flame. Built on the ESP32-S3 microcontroller with Wi-Fi connectivity and a built-in web interface.FeaturesCandle animation — smooth flickering light effect on a 9×16 LED matrixAuto sun mode — automatically turns on at dusk and off at sunrise based on GPS coordinates; sunrise/sunset and twilight times are calculated on-device using NOAA solar formulas (no external API required)Moon phase display — dedicated moon phase animation modeSun position visualization — real-time sun position indicator modeAdjustable brightness — 0–100% via web UI or HTTP APINTP time sync — accurate local time using a configurable NTP server and POSIX timezoneWeb interface — responsive UI served from LittleFS (no cloud dependency)HTTP REST API — control and monitor the device programmaticallyPrometheus metrics — /metrics endpoint for integration with Grafana dashboardsCaptive portal — easy Wi-Fi setup on first bootmDNS — accessible by hostname (e.g. http://candle.local)HardwareComponentDescriptionESP32-S3 ZeroMain microcontroller (Wi-Fi, USB-CDC)IS31FL3731Charlieplexed PWM LED matrix driver (I²C)9×16 LED matrix144 individually controlled LEDs9×16 LED matrixIS31FL3731 PWM controllerSoftware StackFramework: Arduino (via PlatformIO)Web server: ESPAsyncWebServerFilesystem: LittleFSJSON: ArduinoJson 7LED driver: Adafruit IS31FL3731…