This project is about a small Caller ID decoder using the Arduino UNO and a custom-made HT9032D module.

The HT9032D module we created here is based on the application example shown in the IC datasheet. This module consists of standard through-hole type components. No special soldering equipment is required to assemble this module.

This caller ID unit displays the telephone number and date/time sent by the telephone exchange.

Additional details and links to the source and design files are available at http://jayakody2000lk.blogspot.com/2021/08/arduino-telephone-caller-id-unit.html