It's better to use DigiKeyboard.Cognitive scientists and speech pathologists have long used pressable augmentative and alternative communication buttons - each representing an action, place, or object - to communicate with nonverbal individuals. Type out this string letter by letter on the computer (assumes US-style prevent missing the first character after a delay:ĭigitalWrite(LED,HIGH) //Flash the LED to indicate button pressed this is generally not necessary but with some older systems it seems to #define DELAY 100 // Time in ms to delay in polling loop #define LED 1 // On-board LED used to confirm action #define BUTTON 0 // Button that triggers code It looks like there is Linux support with Python library that might work on Pi.Ĭode: Select all #include "DigiKeyboard.h" USB serial boards will allow you to read a handshake pin (CTS or DTR)Īny serial library should allow you to detect changes to the handshake lines. If you need to discriminate between main keyboard and the big button you have to do a bit more work.
You can have it send the code for any key(s)Īnything that behaves as a keyboard can be read as input just the same as if it was the main keyboard.
Many Arduino boards can act as USB gadgets that will look like a keyboard. You can use various devices that will act as USB keyboards, HID controllers or serial ports. Is that possible ? It's nothing more than a "one key" keyboard.Īnd in that case, do you know what can be the python code to capture a press ? I'd like to connect a big physical button so that the front end user will only have one choice : press it when needed and run a script, for example.īut I'd like to do it by USB, not GPIO.
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