I'm writing a simple program for an Arduino that will take the input of 2 buttons and output simulated keys for 2 different functions to use in Clone Hero.
Arduino editor (both online and local versions) spit out
'Keyboard' was not declared in this scope
The offline editor asks if Keyboard.h is included... Which it obviously is.
Any ideas why?
// Keyboard - Version: Latest
#include <Keyboard.h>
//btnWhammy is the button to replace whammy bar function
//btnSP is the button to replace star power activation
//Set Clone Hero to register j for whammy and k for star power
//declaring constant integers for the pins on the Arduino
const int btnWhammy = 2;
const int btnSP = 13;
//Declaring integers for the state of the button press
int btnWhammyState = 0;
int btnSPState = 0;
void setup() {
//Initialisation of the pins as inputs
pinMode(btnWhammy, INPUT);
pinMode(btnSP, INPUT);
}
void loop() {
//Setting the button states to the read of the digital pin (LOW is off, HIGH is on)
btnWhammyState = digitalRead(btnWhammy);
btnSPState = digitalRead(btnSP);
//If the whammy button is pressed, send 'j' to the keyboard, wait 100ms then release all keys
if (btnWhammyState == HIGH) {
Keyboard.press('j');
delay(100);
Keyboard.releaseAll();
}
//If the Star Power button is pressed, send 'k' to the keyboard, wait 100ms then release all keys
if (btnSPState == HIGH) {
Keyboard.press('k');
delay(100);
Keyboard.releaseAll();
}
}
This is a classic mistake -- you are probably compiling for a non-Leonardo board, like a Uno. The Keyboard.h library is not included because it is not present for the board you are compiling with.
I took your code and compiled it for Leonardo -- no issues. For Uno, I get the same error as you...
keyboard key was not declared in this scope i found a very simple and working trick of this problem just go to your main file where you declare all other keys that you are facing not declare
#include <DigiKeyboard.h>
#define KEY_UP_ARROW 0x52
#define KEY_DOWN_ARROW 0x51
#define KEY_LEFT_ARROW 0x50
#define KEY_RIGHT_ARROW 0x4F
#define KEY_TAB 0x2B
Related
I'm working on a project where I can use an IR remote to hook up to my PC and control it because I have a projector connected to it that I want a remote for. I've figured out all of the IR remote stuff and have also been able to configure my Arduino UNO as an HID keyboard (I know there are better solutions for HID devices than Arduino UNO but the way I want this set up makes it so I have to use an UNO). However when I try to send key inputs to my PC it acts like its pressing the Control button (for example if I press A on my actual keyboard after pressing a button on the remote it selects everything on the page I am currently on). I've tried a bunch of different keycodes and looked at other people's code and couldn't find where I am going wrong here is the code I have for my project so far:
#include <IRremote.hpp>
#include <HID.h>
#include <IRremote.h>
int RECV_PIN = 7;
uint8_t buf[8] = { 0 };
void setup() {
Serial.begin(9600);
IrReceiver.begin(RECV_PIN, ENABLE_LED_FEEDBACK);
delay(200);
}
void loop(){
if (IrReceiver.decode()) {
int i;
int command = IrReceiver.decodedIRData.command;
IrReceiver.stop();
switch (command) {
case 70:
Serial.println("Volume +");
buf[2] = 0x80;
Serial.write(buf, 8);
break;
/*
There are a bunch more case statements with different IR commands that
correlate to functions I want the remote to do
*/
}
releaseKey();
delay(500);
IrReceiver.start(8000);
IrReceiver.resume();
}
}
void releaseKey() {
buf[0] = 0;
buf[2] = 0;
Serial.write(buf, 8);
}
Removing the line that prints "Volume +" was the solution. That was apparently not a valid command for the HID firmware. Remember to always simplify your code to the simplest possible thing that should work but doesn't, so you can solve problems like that yourself.
Hey i got a bit problem with my Arduino and sensor
Here is what i tried ;
#define USE_ARDUINO_INTERRUPTS true // Set-up low-level interrupts for most acurate BPM math.
#include <PulseSensorPlayground.h> // Includes the PulseSensorPlayground Library.
#include <SoftwareSerial.h>
SoftwareSerial blue(0,1);
const int PulseWire = 0; // PulseSensor PURPLE WIRE connected to ANALOG PIN 0
const int LED13 = 13; // The on-board Arduino LED, close to PIN 13.
int Threshold = 550;
PulseSensorPlayground pulseSensor;
void setup() {
// put your setup code here, to run once:
Serial.begin(9600);
blue.begin(9600);
pulseSensor.analogInput(PulseWire);
pulseSensor.blinkOnPulse(LED13); //auto-magically blink Arduino's LED with heartbeat.
pulseSensor.setThreshold(Threshold);
pulseSensor.begin();
}
void loop() {
// put your main code here, to run repeatedly:
int myBPM = pulseSensor.getBeatsPerMinute();
if(myBPM>200){
myBPM-100;
}
if (pulseSensor.sawStartOfBeat()) {
Serial.println(myBPM);
blue.println(myBPM);
}
delay(10);
}
this code I got from the example library and modified it.
so i want to send data to my android using Bluetooth but this sensor kinda ticked me off because whenever i use it with my HC-06 Bluetooth module it suddenly got a hearth beat without i even touching it and it just sends so much data ignoring the delay I set.
I just need to slowly sending data just like a second but the data didn't show up
so anyone can help?
I read your code and I noticed this piece of code
if(myBPM > 200){ myBPM - 100; }
that is poorly written if (I understand correctly) you want to check the size of myBPM and if it is larger than 200 then it should be subtracted 100.
it should be:
myBPM = myBPM - 100; not myBPM - 100;
I hope my answer will help you. Have a nice day!
I am trying to wire up a simple switch to an Arduino, as per the code below, for use in a model trainset.
When the buttonState is high, Serial.print(buttonState) shows 111111111, however, the problem I have is when buttonState should be low: Serial.print(buttonState) "flickers" between 0 and 1 like so: 000111100000101000111001.
Why is it doing this and how do I stop it? I assumed it was connections but when I simply use a wire between the 2 ports, plugging it in for on and unplugging for off I still get this issue.
int RED=6;
int YELLOW=5;
int GREEN=3;
int relaytrig = 10; // trigger on pin 10
int powertoswitch = 9; // powertoswitch
int buttonPin = 12; // switch the button comms with
int buttonState = 0;
void setup() {
// put your setup code here, to run once:
Serial.begin(9600);
// inputs
// switch input
pinMode(buttonPin,INPUT);
// outputs
// powerforswitch
pinMode(powertoswitch,OUTPUT);
// track power
pinMode(relaytrig, OUTPUT);
//signal outputs
pinMode(RED,OUTPUT);
pinMode(YELLOW,OUTPUT);
pinMode(GREEN,OUTPUT);
}
void loop() {
// put your main code here, to run repeatedly:
digitalWrite(powertoswitch,HIGH);
buttonState = digitalRead(buttonPin);
if (buttonState == HIGH) {
digitalWrite(relaytrig,LOW);
digitalWrite(GREEN,LOW);
digitalWrite(RED,HIGH);
digitalWrite(YELLOW,LOW);
Serial.print(buttonState);
} else if (buttonState == LOW) {
digitalWrite(relaytrig,HIGH);
digitalWrite(GREEN,HIGH);
digitalWrite(RED,LOW);
digitalWrite(YELLOW,LOW);
Serial.print(buttonState);
}
}
Unplugging it leaves the input pin floating, and noise etc. can make a floating input pin take any value.
Depending on your connection, you need a pull-down or a pull-up resistor on the pin to make it a 1 or a 0 when nothing is connected to it.
From the code, I assume the switching wire is between 5 V (or 3.3 V for some Arduinos) and an input pin. If I'm right, you need to put a, say, 10 kΩ resistor from that input pin to ground. This will keep it 0 when there is no wire connected.
BTW you are using an IO pin (9 aka powertoswitch) to provide the plus for the switch; there's no need and you shouldn't.
Connect one end of the switch to 5 V (or 3.3 V for some Arduinos), and the other end to the input pin. Connect the input pin with the resistor to ground (GND).
There's a picture here, but they use pin 2 as the input pin, and you use pin 12.
Also, your button or wire may need debouncing, but that is another matter.
I am using an Arduino Uno, connected to a USB shield, a RFID shield(adafruit PN532), an LCD, EEPROM(24AA256) and a RTC module(DS1307). I will not post my code here because it is too large and it is separated in multiple files.
In my program, I realize that if my programs enters a certain functions, after entering function after function, if I use a delay() at the end of the function I am currently in, the arduino resets. An example of what I mean is below.
void a() { b(); }
void b() { c(); }
void c() { d(); }
void d()
{
lcd_string("Testing", 0x80);
delay(2000); <---- Arduino resets at the delay here
}
At first, I thought it was because my dynamic memory was at 80%, and when I compiled, they said the Arduino might have some stability issues. So I modified my code such that my dynamic memory is now 57%. Problem still exist.
I thought maybe the delay() function has some overflow or something, so I tried replacing the delay with the following code.
unsigned long timing;
timing = millis();
timing += 2000;
while(millis() < timing);
The Arduino still resets.
Next, I thought maybe because my arduino is connected to my PC, some serial pin might have been causing the reset, so I used an external Power to power up the arduino and disconnected the USB. The arduino still resets.
Next, I thought maybe Timer1 might have been crashing with the delay() function, although the delay function uses Timer0 so I disabled my Timer1 . The arduino still resets.
Is there any other possibilities that I am missing out? My program storage space is at 69% which I believe shouldn't be an issue.
Edit
Here is my code for Timer1 ISR
ISR(TIMER1_OVF_vect)
{
TCCR1A = 0;
TCCR1B = 0;
TCNT1 = 0;
OCR1A = 34286;// = (16*10^6) / (1*1024) - 1 (must be <65536)
TCCR1B |= (1 << CS12);
// enable timer compare interrupt
TIMSK1 |= (1 << TOIE1);
triggered = 1;
}
Any other interrupt of flags used are in the library header files.
I am using the following external libraries
USB Host shield library 2.0
Adafruit PN532 master
A little sample to come close to RAM corruption ...
#define MEM_PER_LEVEL 50
#define TRY_TO_SURVIVE 10
void KillMe(int level) {
byte dummy[MEM_PER_LEVEL];
for ( byte i = 0; i < MEM_PER_LEVEL; i++)
dummy[i]= i;
Serial.println(level);
delay(1000); // not sure why this would hurt more than others
if (level < TRY_TO_SURVIVE) KillMe(level+1);
for ( byte i = 0; i < MEM_PER_LEVEL; i++) {
if (dummy[i] != i) {
Serial.println(F("corruption happened"));
while(1) {} // HALT
}
}
if (level == 0)
Serial.println(F("survived"));
}
void setup() {
Serial.begin(9600);
KillMe(0);
}
void loop() { }
I had the same problem - wherever I put a delay in my setup function the Arduino would restart.
For me, the problem was an instance of SoftwareSerial with invalid pin numbers.
SoftwareSerial mySerial(30, 31);
Anyone else landing on this question should check their pin numbers are appropriate for the board they're targeting. Not sure why the crash only happens if a delay is called, would be interested if anyone has insight into this!
I'm working on a blinking/fading lights program for Arduino. I'm trying to build in some interactivity that's based on LED state and certain switch combinations. Consider: When a button is pressed, if an LED is ON I want to turn it off and if an LED is OFF I want to turn it on.
However, I've not been able to find any information about determining LED state. The closest was this question about Android, but I'm trying to find out if I can do this from the Arduino platform. Does anyone have any practical experience or advice?
It is absolutely OK to read output ports. That is
digitalWrite(LED_PORT, !digitalRead(LED_PORT));
will toggle the pin.
You might also want to consider the toggle library: http://playground.arduino.cc/Code/DigitalToggle
You have several options:
One, you can store the LED state in a boolean, and on button press, negate that and write it to the LED port:
void loop()
{
static int ledState = 0; // off
while (digitalRead(BUTTON_PIN) == 0)
; // wait for button press
ledState = !ledState;
digitalWrite(LED_PORT, ledState);
}
Two, if you don't mind accessing the ports of the AVR directly:
void init()
{
DDRD = 0x01; // for example: LED on port B pin 0, button on port B pin 1
PORTB = 0x00;
}
void loop()
{
while (PINB & 0x02 == 0)
; // loop until the button is pressed
PORTB ^= 0x01; // flip the bit where the LED is connected
}