Questions tagged [keyboard]

A text input device. Utilize this tag to ask programming questions regarding reading input from it or blinking the lights, etc.

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33 views

Arduino emulating a keyboard that has a demultiplexer

I have a old typewriter which I want to automate with an Arduino. The way I am trying to do it is to replace its keyboard with the Arduino and make the Arduino emulate the keyboard i/o. The keyboard ...
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45 views

Arduino HID keyboard does not work

I'm using a ItsyBitsy 32u4, Adafruit says it can act as a USB HID keyboard. The mc is based on the 32u4 which the Keyboard docs say are supported. I have a simple sketch that prints "A" every second ...
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59 views

Which kind of diodes I should use in buttons/keys matrix input? (Making gaming keyboard)

When making matrix input of NxM columns/rows with push buttons, there should be a diode next to each button to prevent "ghosting" and able read many keys pressed together correctly. There is a lot of ...
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21 views

how does someone press and hold a key using keyboard functions?

I have a teensy, setup as a keyboard. The data sends out fine, but the key presses need to be a longer duration. I tried adding a delay, after Keyboard.print("w"); but there was no change in ...
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30 views

Help with Arduino Micro Keypress Algorithm

Greeting, first time Arduino user here. So I am using the Arduino Micro as an HID keyboard device. It accepts arbitrary input from a Node-JavaScript program I am running (so I have full freedom in in ...
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95 views

(Arduino Uno reflashed as USB HID) How to send Scroll Lock key?

I am having a hard time finding documentation on how to properly use USB HID buffers, so the issue may lie there instead of with my code. To get 0x47, I used this table: https://www.usb.org/sites/...
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45 views

Controlling keyboard LEDs with USB Host Shield

I've got a USB keyboard connected to my Arduino Uno with a USB Host Shield. I'm reading keystrokes using this example from the USB Host Shield library. I need to toggle the LEDs in the keyboard (that ...
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2answers
57 views

Matrix keyboard and 7segment display countdown combination

I'm working on an escape room for my university with an Arduino Mega. The last part consists of a 7segment display representing a time countdown, and the participants have to introduce the correct ...
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228 views

Digispark ATtiny 85 - not recognised as HID device

I am trying to create auto-username-writer with Digispark ATtiny 85. I have a pretty simple sketch: #include <DigiKeyboard.h> void setup() { } void loop() { DigiKeyboard....
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36 views

Emit region-neutral keyboard signals

The Keyboard API allows the Arduino boards such as the Micro or Leonardo to emit USB signals mimicking a physical keyboard. However, the signal seems to transmit key strokes and not characters which ...
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97 views

Arduino Micro draws too much power from iPhone. How can I change that?

I'm building a USB keyboard that has two buttons - space and enter. The plan is to use this USB keyboard (with an Apple Lightning connector to USB) with the built in iOS switch control. I bought the ...
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181 views

Convert normal keyboard into Bluetooth Keyboard

I am very new to the Arduino world, I am trying to convert my wired keyboard into a bluetooth keyboard. I have a few layman questions: Is it possible to add an audio jack adapter(like PS4 joystick ...
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1answer
37 views

Arduino Leonardo keyboard.print keeps printing equal sign

I am currently working on a DIY controller for Train Sim World. I am relatively new to the Arduino and the C programming language. My code is structured to look for button presses or PS2 joystick ...
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1answer
2k views

Keyboard.h not found

I keep getting this error message: "'Keyboard' not found. Does your sketch include the line '#include <Keyboard.h>'?" ... when I have already included Keyboard.h. #include <Keyboard.h> ...
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52 views

Is Arduino Keyboard in Single User Mode Possible?

Has anyone had success using the keyboard functionality of any arduino in single user mode of mac computers? I would like to inject keystrokes in single user mode, and have been unsuccessful with the ...
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209 views

Making '*' key on keypad a backspace key

Using a 4x3 membrane keypad and I want to make the '*' key a backspace if the wrong number is entered. I am a newbie and having a hard time trying to figure out how to code that, any help would be ...
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1answer
262 views

Wake up a PC from an Uno

I want to wake up a PC via a USB-connected Arduino. When using a Pro Micro (Leonardo) I can do it, as its HID interface can wake up a PC. That is, in the Device Manager, under "Keyboards", the ...
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762 views

How to convert USB to PS/2? [closed]

Objective: To get my USB keyboard to interface with an Arduino Uno board. Constraints: I can't afford a USB host shield for now for Arduino. Currently available is a keyboard with PS/2 connector. ...
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1answer
1k views

NodeMCU capable of key injection?

Short version: Is the NodeMCU capable of key injection in the same way that an Arduino Teensy can be programmed with Duckuino script to function as a HID? Long version: Recently, my 7+ year old iMac ...
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1answer
300 views

Atmel atmega32u4 not recognized when connected by usb after attempting to flash new bootloader

I am making a mechanical keyboard using Atmel's pro micro as the controller. I decided I would try to replace it's bootloader, as the one it ships with doesn't seem compatible with QMK's RESET ...
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2answers
163 views

Fio Keyboard program out of control, how to reset?

My question involves a Sparkfun Fio v3, similar to the Arduino Fio. I had a student who was testing his understanding of the Keyboard library. He uploaded a sketch that continuously sends output, ...
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1answer
163 views

Interacting with a video game - Keyboard & LUFA

I have an Uno and Leonardo that I am trying to have it interact with the GTA V video game. Using the Keyboard library, it works within the OS. But it ocassionally works within the GTA V process. It ...
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173 views

4x4 Keypad Interface issues

I have not used arduino until now. I thought of interfacing my 4x4 keypad. But when I press keys 1, 4, 7 and *, key values A, B, C and D are sent out to serial terminal respectively. All other keys ...
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2answers
603 views

Keypad password check issue

I am working on a school project, basically I have to create a lock system that opens a fictive gate when the correct code is entered. We have been asked to simulate our system before actually ...
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1answer
184 views

Use Wii Remote and Arduino to emulate a keyboard for Windows 10?

Is it possible to use an Arduino to communicate with a Wii Remote, connect the Arduino to a Windows 10 computer, and have the Wii Remote inputs be translated into keyboard keys for Windows 10? I've ...
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569 views

Bluesmirf Mate Silver (RN-42) enter command mode when in HID mode

I am having problems getting the Bluesmirf Mate Silver (RN-42) into command mode once I have switched to HID mode. I have bought a second new Bluesmirf Mate Silver to confirm my issue. I soldered the ...
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46 views

Why is my keypad requiring a double-click only on the first row to register?

I have a keypad that is connected to my Arduino and each time a key is pressed, the number should be outputted to an LCD screen. The issue is that after the screen is cleared, and a new ID is being ...
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3k views

Typing into ESP8266 with a USB keyboard

I need to be able to connect a USB keyboard, like a tiny Xbox keyboard, or a nice wireless one, into an ESP8266-based thing to type passwords into the MCU. Adapting the PS2 lib for AVRs (PS2==USB ...
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914 views

Uno r3 - Can't get USB Keyboards to work with an USB Host Shield

I'm a day 1 beginner to Arduino, and I am trying to obtain input from a USB keyboard. I've connected the USB keyboard to an Arduino USB host shield attached to an Arduino Uno r3, and I am using the ...
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1k views

Digispark ATtiny85 keyboard

I have a small project that I have in mind and I'm pretty new with Arduino. I want to make a small device that if a key was pressed it would do something. Now I know I could use a button with the ...
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2k views

Arduino/ESP8266 to put PC to sleep and wake it up

I have a Wemos D1 mini that's connected to a pc with usb, I want to be able to sleep the pc and wake it up programmatically. Is there a way to do this? Like sending a simulated sleep keyboard button ...
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395 views

connecting multiple keypads

My project is to use an Arduino to control the lighting of a small apartment. My preferred option is to replace each wall light switch with a 4x4 membrane keypad (https://www.amazon.co.uk/Mirocle-...
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75 views

Make Piano keys on Webpage create sound on Arduino (w/out Shield) [closed]

So I am trying to make a digital keyboard on webpage, that when one of the keys are clicked it creates sounds on the Arduino board. I want to do this without an ethernet shield. I am a beginner so I ...
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3answers
800 views

Arduino Leonardo as keyboard for an iPad

I'm trying to make a Arduino Leonardo as a Keyboard for an iPad. I was successful with an Arduino UNO. However I'm hoping to use an ATmega 32U4 because of the better HID functionalities and smaller ...
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365 views

PS2 Keyboard and sending keystrokes between a Leonardo and several pro micros

I am working on a project where I am taking the the key presses from a PS/2 keyboard and passing them to several pro micro boards so I can type the same commands on multiple computers at the same time....
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30 views

weird output from keyboard program

I am trying to write a keyboard (Key-glove) program. There are 4 buttons, and inputs should type specific keys. when the keyboard is active, I get output, but not what I am expecting for output. I get ...
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1answer
300 views

65 hall effect sensors as switches to be used as a keyboard with a teensy

I'm trying to wire up a silly little keyboard using hall effect sensors and magnets in a glove. The idea being only I can use the keyboard since I'll have the glove. The sensors are 3 pin, (vcc, gnd,...
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1answer
20k views

Arduino nano as HID Keyboard

I'm a bit of a noob in the Arduino area but I found an Arduino nano I bought a long time ago sitting on my shelf and collecting dust, so I taught "why not make a project". I game a lot of racing ...
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1answer
3k views

Arduino as a real device to computer

Suppose we have a computer mouse , now when we connect it to a computer then computer understands it is a mouse which is been connected to it. Same thing happens for keyboard and many other devices. ...
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2answers
628 views

Arduino Leonardo as USB Keyboard with WiFi module

I have two PCs: the first is connected to the Arduino via WiFi, this will instruct the Arduino what keys to send, and the second PC is connected to the Arduino via USB that will act as a USB Keyboard ...
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2answers
492 views

Grab keys from an ordinary USB kyboard

Arduino USB I want to write an Arduino Sketch (if there is no other possibility it can also be plain c) , to grab keyboard inputs from my ordinary USB keyboard. Preferably without expensive hardware, ...
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2answers
448 views

Using ATiny102 as HID device(emulating mouse)

I am trying to make my own mouse/keyboard from an attiny (it doesn't have to be attiny102 as the title suggests). I have read many articles on this subject: some are using v-usb library.But I ...
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1answer
119 views

Qduino Mini bricked?

So I have been experimenting with keyboard inputs and I think I may have accidentally put a loop in my code that never actually ends the keyboard input thus not allowing me to upload any sketches to ...
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1answer
766 views

Arduino Uno as keyboard

I am trying to make Arduino Uno to act as a keyboard. I have successfully flashed the USB-HID firmware in it using this link also and programmed it like this. uint8_t buf[8] = { 0 }; int inpin1 = 7;...
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1answer
68 views

Why does Keyboard.Print adds random values to url?

I'm trying to print a sequence of power shell commands including a url to the powershell interpreter but every time I execute it with the Arduino Micro it adds random values to the url. Here's the ...
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2answers
3k views

How to add extra USB port to Arduino Nano?

I'm trying to use V-USB library to emulate a keyboard using Arduino Nano but because of precaution, I don't want to use it's built-in USB port. My idea is to add another USB port so I cant power my ...
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1answer
321 views

Printing multiple double qoutes in print statement

I'm trying to print multiple quotes in a Keyboard.print() function but when i try to escape the character with \ at $output =\"$HOME\Misc\nc.zip\"" and the string does not get recognized by the ide. ...
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1k views

How to make auto keyboard using arduino nano V3.0 ATmega 328P ?

I have an Arduino Nano v3.0 ATmega328p board. I want to make an auto keyboard that types in a string when its plugged in. I have googled and found that these chips doesn't support that feature unlike "...
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1answer
404 views

Arduino Leonardo - disabling the debugger port

My Sketch program is working perfectly as a specialized keyboard application on the Leonardo. I want to disable the development tools drivers from the USB, (COM PORT) leaving only the HID Keyboard ...
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3answers
7k views

Digispark / DigiKeyboard change keyboard layout

I'm trying to use the Digispark as a Rubber Ducky but the Digispark is only usable with the US laylout. German keyboard layout is QWERTZ. Some keys can be changed, like y and z, but if there are [ or ]...