For the project there is a Nano 328P controller (possibly Mega 2560), an OLED SSD1306 display, a DS3231 watch module, ds18b20 temperature sensors, the rest of the relay and buttons.
A program/sketch for an aquarium fertilizer dispenser is needed. The main features are displaying hours, temperatures, multi-channel weekly timer, settings menu, cyclic on/off control program for three pumps.
Program algorithm: When running on a timer or manually, there is a cyclical feeding of the Udo in turn, for 1, 2 and 3 pumps. The number of cycles and pauses between them is set in the settings. There are 4 buttons, 1, 2 and 3 - loop skip for each pump. 4 completes the execution of the program.
The project is not commercial, no special urgency is required.