Arduino library to calculate the times of sunrise, sunset, solar noon, twilight, the solar position, and more.

Arduino Dimmable PWM DIY LED Light for Marine/Reef/Freshwater Aquarium controller with Nextion LCD support and temperature/cooling fans control (3 sensors/fans)

The answer to your daylight related questions

Compute astronomical data from given geoaraphic coordinates, date and time

Timer Clock program for the ESP8266. 4 timers with ON and OFF time or automatically switch ON and/or OFF by SunSet and/or SunRise with Offset

A LED lighting project based on actual daylight measurements and calculations

An automatic garden watering system using an Arduino

Panel Meter Clock

Arduino-based timer using an RTC module and an OLED display. Will control a relay output to turn on/off lamps or other loads based on sunrise/sunset. Several options to adapt the way it works.

Calculate sunrise, set times, twilights, wait for any such events, and poll whether it is day or night.

Library to facilitate estimate Sunrise, Sunset and Noon times for a location and at time. Use astronomicals ecuations.

C library to compute sunrise/sunset times

All this project does is that at sunrise it switches on the SSR relay for 230 V and at sunset it switches it off using DOIT ESP32 DEVKIT V1.