Arduino wait for serial input

Then, at the top of the program, add:. This is the basic idea. I also strongly encourage you to read a bit about programming in general, and C programming in particular. I also advise you to try to stick to some convention for indenting your code.

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Collectives on Stack Overflow. Learn more. Arduino: wait for serial input Ask Question. Asked 5 years, 3 months ago. Active 2 years, 9 months ago. Viewed 13k times. MayeulC 1, 12 12 silver badges 24 24 bronze badges. Tamanna Islam Tamanna Islam 61 1 1 gold badge 1 1 silver badge 6 6 bronze badges. Add a comment. Active Oldest Votes.

Now, there is two ways of achieving this: Either make a proper state machine design, which would be the preferred way Or just wait for the serial to be available at some point. For the second solution, you could replace if Serial. MayeulC MayeulC 1, 12 12 silver badges 24 24 bronze badges. This is the answer. Community Bot 1 1 1 silver badge. Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. Post as a guest Name. Email Required, but never shown.

The Overflow Blog. In the above code, if there is no input present at the serial port, then the Arduino will be stuck in a loop and will remain there. If an input arrives at the serial port, the loop will break, and the serial will read data using Serial. If you want to read input from a digital pin then, you can use the digitalRead function to wait for the input.

In the above code, if there is no input present at the digital pin, then the Arduino will be stuck in a loop and will remain there. If an input arrives at the digital pin, the loop will break, and the serial will read data using digitalRead and store it in the variable valPin. Set the Arduino to Wait for the Input Using the digitalRead Function If you want to read input from a digital pin then, you can use the digitalRead function to wait for the input.

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