avrdude: Version 6.3-20190619
Copyright (c) 2000-2005 Brian Dean, http://www.bdmicro.com/
Copyright (c) 2007-2014 Joerg Wunsch
System wide configuration file is "C:\Users\meder\AppData\Local\Arduino15\packages\arduino\tools\avrdude\6.3.0-arduino17/etc/avrdude.conf"
Using Port : COM6
Using Programmer : arduino
Overriding Baud Rate : 115200
avrdude: ser_open(): can't open device "\.\COM6": Access is denied.
Show your code in code brackets and a circuit diagram of all connections including programmer used....NOT fritzing.
can you use the Arduino IDE and select the Tools->Port tab with and without your Arduino plugged in. The correct COM port should appear only when the Arduino is connected
// TM1637 Digital Clock with Setup and Alarm Functionality
#include <Arduino.h>
#include <TM1637Display.h>
#include <virtuabotixRTC.h> //
// RTC module declaration
// PINS CLK, DAT, RST
virtuabotixRTC myRTC(A1,A2,A3);
// Variables to store previous values read off RTC module
int minutes;
int hours;
// Variables to store the time at which Alarm should go off
int Alarm_minutes=05;
int Alarm_hours=18;
uint8_t Blank[] = {0x0};
int POSITION=0;
//Table to store 4 digits, used in time and Alarm setup procedure
int digits[3];
int interval=0;
#define Alarm 9 // Button to switch alarm mode on or off
#define Buzer 13
#define Led 8
//Statuses
boolean Alarm_set=false;
boolean Alarm_in_progress=false;
boolean Setup_on= false;
// 4digit display connection pins (Digital Pins)
#define CLK 4
#define DIO 5
// 4 digit display declaration
TM1637Display clock(CLK, DIO);
void setup() {
attachInterrupt(digitalPinToInterrupt(2), Press_A_Button,RISING);
attachInterrupt(digitalPinToInterrupt(3), Press_B_Button,RISING);
pinMode(Alarm, INPUT);
pinMode(Buzer, OUTPUT);
pinMode(Led, OUTPUT);
digitalWrite(Buzer,LOW);
clock.setBrightness(0x0f);
Serial.begin(9600);
}
void Press_A_Button(){
if (interval>3){
if (Setup_on==false){
Setup_on=true;
if (Alarm_set==true){
digits[0]= (int)Alarm_hours/10;
digits[1]= Alarm_hours-((int)Alarm_hours/10)*10;
digits[2]= (int)Alarm_minutes/10;
digits[3]= Alarm_minutes-((int)Alarm_minutes/10)*10;
}
else {
digits[0]= (int)myRTC.hours/10;
digits[1]= myRTC.hours-((int)myRTC.hours/10)*10;
digits[2]= (int)myRTC.minutes/10;
digits[3]= myRTC.minutes-((int)myRTC.minutes/10)*10;
}
}
else{
POSITION++;
if (POSITION==4){
if (Alarm_set==true){
Alarm_minutes=digits[3]+digits[2]*10;
Alarm_hours=digits[1]+digits[0]*10;
}
else {
myRTC.setDS1302Time( 0, digits[3]+digits[2]*10, digits[1]+digits[0]*10,myRTC.dayofweek, myRTC.dayofmonth, myRTC.month, myRTC.year);
clock.showNumberDec(digits[0],false,1,0);
clock.showNumberDec(digits[1],false,1,1);
clock.showNumberDec(digits[2],false,1,2);
clock.showNumberDec(digits[3],false,1,3);
}
POSITION=0;
Setup_on=false;
}
}
}
interval=0;
}
void Press_B_Button(){
if (interval>3){
if(Setup_on){
digits[POSITION]=digits[POSITION]+1;
if (POSITION==0 and digits[POSITION]==3) digits[POSITION]=0;
if (POSITION!=0 and digits[POSITION]==10) digits[POSITION]=0;
interval=0;
}
}
interval=0;
}
void loop() {
if (digitalRead(Alarm)==HIGH and Alarm_set==false ){
if (interval>30){
digitalWrite(Led,HIGH);
Alarm_set=true;
delay(300);
}
} else{
if (digitalRead(Alarm)==HIGH and Alarm_set==true){
if (interval>30){
Alarm_set=false;
Alarm_in_progress=false;
digitalWrite(Led,LOW);
delay(300);
}
}
}
myRTC.updateTime();
if (Setup_on==true){
clock.showNumberDec(digits[0],false,1,0);
clock.showNumberDec(digits[1],false,1,1);
clock.showNumberDec(digits[2],false,1,2);
clock.showNumberDec(digits[3],false,1,3);
delay(200);
clock.setSegments(Blank, 1,POSITION);
delay(200);
clock.showNumberDec(digits[0],false,1,0);
clock.showNumberDec(digits[1],false,1,1);
clock.showNumberDec(digits[2],false,1,2);
clock.showNumberDec(digits[3],false,1,3);
}
else{
if (myRTC.minutes==Alarm_minutes and myRTC.hours==Alarm_hours and Alarm_set==true and Setup_on==false){
Alarm_in_progress=true;
}
if (Alarm_in_progress){
digitalWrite(Buzer,HIGH);
delay(1000);
digitalWrite(Buzer,LOW);
delay(1000);
}
if (myRTC.minutes!=minutes){
clock.showNumberDecEx((int)myRTC.hours/10*1000+(myRTC.hours-((int)myRTC.hours/10)*10)*100+ (int)myRTC.minutes/10*10+myRTC.minutes-((int)myRTC.minutes/10)*10, (0x80 >> 1), true);
minutes=myRTC.minutes;
hours=myRTC.hours;
}
}
if (interval<200) interval++;
}
The correct comm always appears its just when i click upload it says cannot access device
sure you specified the correct board
Tools->Board
What Arduino are you using?
What computer operating system are you using?
Is the Serial monitor closed when trying to upload?
access denied can be a a USB computer problem where something is blocking the port.
There is a tool called Process Explorer to see what that might be.
If your issue was not an open serial monitor and you need to use the process explorer tool, here are some links on how to use it.
I'm using arduino nano and im on windows 11 no its opened when i upload ill try using the process explorer and see if anything is blocking the port.
I used process explorer it said 0 searches found i went to device manager got the value put it in and there was nothing that was conflicting or blocking.
Yes i am using the right board it Says arduino nano under tool>board
Im not sure if this means anything but when i go to process explorer Arduino says access denied where it says path
Which bootloader?
I think there maybe some driver issues with the usb interface chip (CH340?)on the Nano and Windows 11.
Try the forum search bar and then Google to get you started.
I'm using ATmega328P I've tried both this one and the old one and it didn't make a difference
Bro thank you so much you helped me figure out the issue. it was a problem with my drivers i just uninstalled and reinstalled and it worked.
it was a problem with my drivers
Can you be more specific? I'm about to get a Windows 11 computer and I'm expecting my Arduino environment to be somewhat stormy. 
The CH340 drivers were outdated and also their were duplicates so all i did was go to this website https://www.wch.cn/downloads/CH341SER_EXE.html when you download it it says uninstall and install i clicked uninstall then i installed the driver and it worked. I'm not sure if the issue was because there were duplicates of the same driver or because the drivers were outdated
I went through that about 3 months ago and it was a smooth sailing.
Only thing I did was install an old version of the CH340 driver (see Port monitor error: command 'open' failed: Invalid serial port. Could not connect to COM serial port - #49 by ptillisch). Windows seems to have upgraded it and I have not experienced issues with it.
Note that this is only necessary if you are unfortunate enough to have acquired a board that has a dodgy unlabeled "CH340" USB to serial bridge chip. If you don't use any boards with the CH340, or if your boards have the CH340 with the expected labeling, then you can use the latest CH340 driver.
I have actually been hampered in my efforts to support the affected users due to not having one of these boards (I have plenty of CH340, but all labeled). A few months ago, I did a shopping spree on Amazon, buying one of each of the Chinese boards that showed an unlabeled chip in the product photo. I was disappointed to find that all the boards I received had labeled chips, and all of them work perfectly with the latest driver. So it seems that as long as you buy from more reputable stores/marketplaces, it is unlikely you will get one of these chips. I would guess that you are much more likely to get one from the random sellers on AliExpress, and probably eBay as well to a lesser extent.
I know; and I don't have those. But pre-installing the older driver allows an easier rollback if needed.
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