DTMF Phone Call Control Home Appliance Using Arduino and GSM Module & Home Automation

Arduino UNO is a basic research project that uses DTMF technology to regulate various loads (electrical appliances). DTMF, or Dual Tone Multi Frequency, is a signalling mechanism commonly used in telecommunications. In the DTMF-based Load Control System utilizing Arduino UNO paper, multiple communication methods including DTMF and GSM are used to control our household appliances using mobile phones. The DTMF technology serves as the foundation for the microcontroller-based DTMF-based load control system's operating concept. With DTMF technology, a corresponding and distinct tone is produced when a key or button is touched on a telephone. Two distinct frequencies are combined to create this tone. Each key corresponds to two frequencies, and when the key is pressed, a tone is produced that is an overlap of those two signals. There are 12 keys on a standard telephone keypad, which includes two symbol keys and 0 to 9 number keys. The result of our home automation system is a PIR-based light control system and an automatic water tap.