I am going to use an HC-12 module to send numeric data - e.g. mySerial.println(1111)
I want to send 9 values individually as control codes to be dealt with in the receiver, controlling a camera pan left, pan right, tilt up, tilt down plus 5 OSD settings.
I could use 9 pushbuttons to 9 Arduino pins but sure this is wasteful. Only alternative I can think of is using a joystick that stays where it's left, i.e not return to zero, plus 5 pushbuttons utilizing a resistor chain where I can look at ADC values.
Are there any other ways to make 5 or 9 pushbuttons create a value to put into mySerial.println(value)