This depends on the Arduino board. In some boards like the Leonardo, you cannot use an analog pin as a digital pin. To check if an analog pin can be used as a digital pin, use the isTerminalDigital command.
In the Capacitive Sensor addon, can I use an analog pin on the Arduino board as the ‘sendPin’ or ‘receivePin’?
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In the Capacitive Sensor addon, can I use an analog pin on the Arduino board as the ‘sendPin’ or ‘receivePin’?
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