I have a TinkerCad model of a three player quiz game buzzer system and for the first button press detection Im using attachInterrupt().
Detection works. I wanted to light up the onboard LED of arduino with void PinTwoPressed() to see If everything worked and It does. But when I try to print on the LCD I set up in void setup() via PinTwoPressed() It never prints. In void loop() all the print functions work without fail.
Is It because of the library itself or what am I missing?
// C++ code
//
#include <Adafruit_LiquidCrystal.h>
Adafruit_LiquidCrystal lcd(0);
void setup()
{
lcd.begin(16, 2);
lcd.setBacklight(1);
attachInterrupt(digitalPinToInterrupt(2), PinTwoPressed, HIGH);
}
void loop()
{
}
void PinTwoPressed() {
lcd.setCursor(0, 0);
lcd.print("Player");
lcd.setCursor(0, 1);
lcd.print(3);
}
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I'm currently working on a lasertag game with several weapons.
I would like to use one arduino nano in each weapon. It should be able to receive the IR-signals of the opponents as well as send IR-signals if a button is triggered.
So now there comes my problem:
I implemented an interrupt for the IR-receiver pin, so that an opponent's shot is always detected even when I'm shooting.
When the button is permanently pressed, the IR LED will shoot every 300 milliseconds (the send-function takes approximately 70ms and I implemented a delay of 230ms).
Unfortunately, the Nano won't detect any signal of the receiver in those 300ms.
However, if I disconnect the IR-LED everything seems to work perfectly.
Now I'm wondering, why the IR-LEDs connection has an effect on the functionality of my code.
Do you know any way I could solve this problem?
Here you can see the entire code I implemented:
#define IR_SEND_PIN 3
#define BUTTON_PIN 10
#define LED_PIN 12
#include <IRremote.hpp>
#include <Arduino.h>
uint8_t sAddress = 0;
uint8_t sCommand = 0x59;
uint8_t sRepeats = 0;
volatile uint8_t hitData;
void setup() {
IrSender.begin();
IrReceiver.begin(IR_RECEIVE_PIN);
pinMode(LED_PIN, OUTPUT);
pinMode(BUTTON_PIN, INPUT_PULLUP);
attachInterrupt(digitalPinToInterrupt(IR_RECEIVE_PIN), HIT, CHANGE);
}
void HIT() {
if (IrReceiver.decode()) {
hitData = IrReceiver.decodedIRData.command;
}
IrReceiver.resume();
}
void loop() {
if (digitalRead(BUTTON_PIN) == LOW) {
IrSender.sendNEC(sAddress, sCommand, sRepeats);
delay(120);
}
if (hitData == sCommand) { // indicates received signal 0x59
hitData = 0x00;
IrReceiver.resume();
digitalWrite(LED_PIN, HIGH);
delay(8);
digitalWrite(LED_PIN, LOW);
}
}```
I want to call some functions at the rising edge and falling edge of a square wave pulses. I used attachInterrupt(digitalPinToInterrupt(interruptPin), udara, RISING) for rising edge and attachInterrupt(digitalPinToInterrupt(interruptPin), blank,FALLING) for falling edge. But I didn`t get the serial outputs of rise and fall conservatively. what is the answer for the problem? My code is written as follows.
enter code here
const byte interruptPin = 2;
void setup() {
Serial.begin(9600);
pinMode(interruptPin, INPUT);
}
void loop() {
attachInterrupt(digitalPinToInterrupt(interruptPin), udara, RISING);
attachInterrupt(digitalPinToInterrupt(interruptPin), blank, FALLING);
}
void udara() {
Serial.println("rise");
}`
void blank() {
Serial.println("fall");
}
The attachInterrupt() should be part of setup(), not the loop(), as it is used to setup the event trigger and callback.
const byte interruptPin = 2;
void setup() {
Serial.begin(9600);
pinMode(interruptPin, INPUT);
attachInterrupt(digitalPinToInterrupt(interruptPin), udara, RISING);
attachInterrupt(digitalPinToInterrupt(interruptPin), blank, FALLING);
}
void loop() {
}
void udara() {
Serial.println("rise");
}
void blank() {
Serial.println("fall");
}
Serial uses interrupts to push out the data. Those interrupts are disabled during your ISR. For that reason, it is best to avoid using Serial in an ISR. Change the code to set a flag in the ISR and do the printing from loop in response to the flag.
I used this code to send data from the Arduino board to LoRa E45-TTL. The board seems to transmit data, but the receiving node doesn't seem to receive data. I am a real beginner to LoRa technology and any help is highly appreciated. The sending and receiving node codes I used are below:
Sender Node
void setup() {
Serial.begin(9600);
}
void loop() {
Serial.println("000106,supun");
delay(2000);
}
Receiver Node
void setup() {
Serial.begin(9600);
}
void loop() {
if(Serial.available()) {
char x=Serial.read();
Serial.println(x);
delay(200);
}
}
This post mentions a similar problem, with a hackish solution to close Serial and re-open it.
void loop() {
Serial.print("Test");
Serial.end();
delay(30);
Serial.begin(9600);
delay(70); //The rest of requested delay. So 100 - 30 = 70
}
Okay, so I'm using an Arduino Uno on a Windows 10 PC, as well as Processing 3. I'm attempting to follow the directions on the Arduino website for controlling the brightness of an LED by moving my across the PC screen, by having the Arduino software cooperate w/ Processing. (Here's the link to the project I'm talking about: https://www.arduino.cc/en/Tutorial/Dimmer) It seems so simple, yet it's not quite working. The LED will glow, but its brightness won't vary with the mouse's X position, and its glow is flickering. I get no error codes.
As regards the circuit, I have an LED connected to PWM pin 9, with a 200-ohm resistor to ground; I am certain that the polarity of the LED is correctly set up. The website isn't clear how exactly Processing & the Arduino software should collaborate to make this happen. (So I would greatly appreciate an explanation thereof if possible.) The Arduino & Processing codes are below. I don't understand what I'm doing wrong?
Here is my Arduino code:
const int ledPin = 9; // the pin that the LED is attached to
void setup() {
// initialize the serial communication:
Serial.begin(9600);
// initialize the ledPin as an output:
pinMode(ledPin, OUTPUT);
}
void loop() {
byte brightness;
// check if data has been sent from the computer:
if (Serial.available()) {
// read the most recent byte (which will be from 0 to 255):
brightness = Serial.read();
// set the brightness of the LED:
analogWrite(ledPin, brightness);
}
}
Here's my Processing code:
import processing.serial.*;
import cc.arduino.*;
Arduino arduino;
void setup() {
size(256, 150);
arduino = new Arduino(this, "COM3", 9600);
}
void draw() {
background(constrain(mouseX, 0, 255));
arduino.analogWrite(9, constrain(mouseX, 0, 255)); //
}
For those of you who wish to know, here is my functional code:
Arduino portion:
const int ledPin = 9; // the pin that the LED is attached to
void setup() {
// initialize the serial communication:
Serial.begin(9600);
// initialize the ledPin as an output:
pinMode(ledPin, OUTPUT);
}
void loop() {
int brightness;
// check if data has been sent from the computer:
if (Serial.available()) {
// read the most recent byte (which will be from 0 to 255):
brightness = Serial.read();
// set the brightness of the LED:
analogWrite(9, brightness);
}
delay(10);
}
Processing portion (on Processing 3):
import processing.serial.*;
import cc.arduino.*;
Serial arduino;
void setup() {
size(256, 150);
arduino = new Serial(this, "COM3", 9600);
}
void draw() {
background(constrain(mouseX, 0, 255));
arduino.write(constrain(mouseX, 0, 255)); //
}
I have been enjoying working with appinventer.I controlled my home appliances with my app and now working to control the led intensity or a motor speed with the same.
I made it but what it resulted is that I cant get what I communicate through slider thumb position -----on arduino serial monitor instead it shows other(but between 0-255)
this is my code-----
#include<SoftwareSerial.h>
int led1 =11;
int c;
SoftwareSerial mySerial(9,10);
void setup()
{
pinMode(led1,OUTPUT);
Serial.begin(1200);
mySerial.begin(57600);
Serial.println("bluetooth controlled home appliances");
}
void loop()
{
if (mySerial.available())
{
c=mySerial.read();
Serial.print("value received is : ");
Serial.println(c);
int p=map(c,0,255,0,255);
Serial.print("value mapped is : ");
Serial.println(p);
analogWrite(led1,p);
} else {
Serial.println("no available data found");
}
}
To control the led intensity you should use a pwm pin and write the number received. You cant wok with the analogwrite.