I have an RFID module as well as a servo motor and I am wondering if I can double jump a pin to send a signal to both of them.
I am wondering if I can double jump a pin to send a signal to both of them.
Yes, although I'm not sure that doing so makes sense. An RFID outputs data, so the Arduino should be reading data FROM the RFID reader. A servo is an output device, so you would be writing to the servo, using the Servo library to diddle with the pin in the correct way.
What is the RFID device going to do with PPM data for a servo?
I have an RFID module as well as a servo motor and I am wondering if I can double jump a pin to send a signal to both of them.
That would only make sense if the servo and RFID module were "addressable".
For example, in a computer the data & address buses go to RAM, ROM and several other places, but only one device/path is enabled at a time. So if you are reading from ROM, the RAM is disabled, etc.
The general rule is that you can connect two (or more) inputs together, so you can have a signal going into two Arduinos. But, you should not connect two outputs together* because if one writes high and the other writes low you can get excess current a burn something up (and you'll have an unknown state with high & low 'fighting' each other).
Ya, this doesn't make sense. Can you share more about the project?