Serial.println("DTMF Decoder Ready...");
Since the MT8870 needs an audio input, you must use a "Virtual Phone" or a DTMF generator component found in the Proteus library to provide the input tones. mt8870 proteus lib 35
The MT8870 is a comprehensive DTMF receiver that integrates both a band-split filter and a digital decoder. In a real-world application, it decodes the 16 standard DTMF tone-pairs (generated by telephone keypads) into a 4-bit digital code. Specification 4.75V – 5.25V (5V Nominal) Decoding Range 16 tones (0-9, *, #, A, B, C, D) Interface 4-bit binary data (Q1-Q4) + Data Valid (StD) Oscillator 3.579545 MHz Crystal 2. The Proteus Lib 35 Library Serial