A box has to be made. I varnished my box all in the same direction, to give it an even coat. Unplug and plug the arduino back in, it will now be seen to the computer as a keyboard and not an arduino. Now that everything is defined, we move into the setup portion of the code, We start by setting the mode of each pin, we do this with pinMode(pinNumber, modeType); The mode type always has to be in full capitals. Also, the Serial is initialized with a standard baud rate of 9600. You will need to wipe any varnish out of the LED hole, cable hole and button holes as the varnish can block the hole up. I used nails from cable clips, you want them long enough to go through the wood and be a pin for the board support tray to hold onto, but not too long that they will stab you or short out your circuit, the nail heads under the board might make the box not sit flat on your desk, some small rubber feet will help stabilize the box, I didn't add these to my box as my box sits on some papers and they stabilize it enough for me. If you are adding LED's to your buttons, you will need to assign them as OUTPUT, then in the next section assign them to LOW on start up. We declare a state, this will be the base state that the code references, to know if a button has been pressed. The wood can be cut with a hand saw, jigsaw or a band saw if you have one at hand. The circuit diagram above is a simplified version of what mine is. Then, press the 'load hex' button and select the file. Keyboard.println(string) - Just like Keyboard.print() except this adds an [Enter] key to the end of the string. Today, I’ll create a macro Keyboard, Mouse with serial data that came with Arduino Pro Micro. The next line of code if(state != 1) triggers when the state is not 1 (!= means not equal) so if state is != to 1 because it has been changed to a 0 by the button press, execute the code within the if statement. https://www.ebay.co.uk/itm/16mm-Round-Metal-Push-B... https://www.ebay.co.uk/itm/40-pcs-Dupont-Cables-M-... You can make a cardboard housing if you are not good with tools, or for a starting prototype box. Then hammer some small nails in to hold the tray in place inside. To access the arduino keyboard library we need to begin keyboard inputs, we do this with. Before you can click the open button you need to short out two pins, on the picture above you will see an arrow pointing at two pins, get a piece of jumper wire and short the two pins closest to the USB port. I stuck to two coats as it looked good enough to me. Then go to devices and printers, find your arduino which will be called a keyboard. If your board is fresh out of the box with no code on it, this might be the easier option to you. Below are the links to the videos and pages that helped me. A good use case for this might be a custom quick chat keyboard for games. You can tinker and mess with this number to get it perfect for your macro box. Then go to devices and printers, find your arduino which will be called a keyboard. Then click the icon next to that one and click USB to begin communication via USB, if you get an error while pressing this button you will need to take an extra couple of paragraphs. Any sensor or button is an INPUT, while any LED or buzzer will be an OUTPUT. Then, you need to upload the keyboard.hex file through flip. But I uploaded other code to mine to test how it works before I tried to move onto this project code. Press ctrl+u and click on 'open'. http://www.usb.org/developers/hidpage/Hut1_12v2.pd... Once you have set all that up, you will need a buffer. The image above has the dimension for the box size I made, all numbers are centimeters. Click the Blank Check box and hit run, all lights should go green, if verify goes red. When building the circuit the LED has two legs an anode which is positive, and a cathode which is negative, you can tell the difference as the LED has one leg longer than the other, the longer leg is the positive anode. I did the same file method once I varnished the top as varnish inside the button holes will stop them from sitting properly. Which triggers the button presses. The key ID corresponds to the keys on your keyboard, below is a link that you can use to find specific key codes, it is on page 53 down. But it is a simple line of code you write it like #define variable name pin number. They can both be made more compact, they are just as an example. VM's macro keyboard. 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2020 arduino macro keyboard