[Rogal] wrote a cell phone application called ToneTool that generates audio tone sequences. It can be used to output DTMF and SelCall sequences which are used by telephone systems and radio ...
The 1970s called and they want their rotary dial cell phone back. Looking for all the ... the dial translates rotary action to DTMF tones for the Feather FONA board inside. Far from a one-trick ...
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