i am working on a project to make an alarm clock that yοu can set from a webpage on arduino or with physical buttons, when the alarm rings clock would print your todo list on POS printer.
- Arduino Mega 2560 R3
Ethernet shield (w5100) with micro sd card reader // to host the webpage on local network
- crystal LCD shiel with 5 buttons, buttons use A0 pin
- Tiny RTC module, I2C, digital pin 20,21
- piezo speaker
- old IBM POS printer with rs232 interface
I have the code for each individual module, tested everything separately and it works.
This is the first time doing project this complicated, can someone please help me and send me in the right direction how to make code work together. I don't know if it's possible to make this work just with one void loop and interupts, any advice will be appreciated thanks