Serial actions allow you to interact with a Serial IO device that you own. To set up a Serial IO device, first head to the Settings menu and then select Serial Devices. After you have added your Serial IO devices, simply select the device you would like to communicate with from the drop down & the message you would like to send. The message is sent exactly as you type it in plain text, so if your Serial Device is expecting a specific format to the text (EX: JSON), then you must type it as such in the Message text box.