How send signal from telephone to arduino?

Hi everyone. I need to send the signal from the telephone to arduino.Yeah i know i can find a lot of program on playstore but my program which is i want is different. For instance, when I press any button it'll send the signal which I set before from settings. Do you know like these programs or do you have like these apks?

by the way, I don't need electronic or programming support. Already i can create this connection with Hc-05. I need just apk or program. If you help me, i'll very glad

Insufficient information. Read forum guide top of every section

What is "the signal"?

How are the telephone and Arduino connected to each other?

I wanna signal will depend on me? How? For instance, when i set first button's signal is '1' that time I'll write on program if == '1' then blah blah blah. telephone and arduino connect each other with hc-05

I wanna signal will depend on me? How? For instance, when I set the first button's signal is '1' that time I'll write on Arduino program if == '1' then blah blah blah. telephone and Arduino connect each other with hc-05

Post the code.

Are you talking about interpreting Dual tone multi-frequency (DTMF) using an Arduino? What is DTMF (dual tone multi-frequency) and how does it work?

If so, here is an example: DTMF decoder library - #75 by 6v6gt

blah, isn’t a C++ keyword, and you don’t show your blah() function.

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