Sketch not running

Using Arduino Programming Questions
1

I have a very simple sketch - just a blinking LED - which is being compiled without errors.
But after uploading the sketch nothing happens. Disconnected from the IDE I checked it with
a meter and the LED blinked properly.
After uploading the sketch not even the loop is executed.
Instead, the IDE gave the following messages (in orange characters)

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 "E:\myprograms\arduino-1.8.16\hardware\tools\avr/etc/avrdude.conf"

         Using Port                    : COM9
         Using Programmer              : wiring
         Overriding Baud Rate          : 115200
         AVR Part                      : ATmega2560
         Chip Erase delay              : 9000 us
         PAGEL                         : PD7
         BS2                           : PA0
         RESET disposition             : dedicated
         RETRY pulse                   : SCK
         serial program mode           : yes
         parallel program mode         : yes
         Timeout                       : 200
         StabDelay                     : 100
         CmdexeDelay                   : 25
         SyncLoops                     : 32
         ByteDelay                     : 0
         PollIndex                     : 3
         PollValue                     : 0x53
         Memory Detail                 :

                                  Block Poll               Page                       Polled
           Memory Type Mode Delay Size  Indx Paged  Size   Size #Pages MinW  MaxW   ReadBack
           ----------- ---- ----- ----- ---- ------ ------ ---- ------ ----- ----- ---------
           eeprom        65    10     8    0 no       4096    8      0  9000  9000 0x00 0x00
           flash         65    10   256    0 yes    262144  256   1024  4500  4500 0x00 0x00
           lfuse          0     0     0    0 no          1    0      0  9000  9000 0x00 0x00
           hfuse          0     0     0    0 no          1    0      0  9000  9000 0x00 0x00
           efuse          0     0     0    0 no          1    0      0  9000  9000 0x00 0x00
           lock           0     0     0    0 no          1    0      0  9000  9000 0x00 0x00
           calibration    0     0     0    0 no          1    0      0     0     0 0x00 0x00
           signature      0     0     0    0 no          3    0      0     0     0 0x00 0x00

         Programmer Type : Wiring
         Description     : Wiring
         Programmer Model: AVRISP
         Hardware Version: 15
         Firmware Version Master : 2.10
         Vtarget         : 0.0 V
         SCK period      : 0.1 us

avrdude: AVR device initialized and ready to accept instructions

Reading | ################################################## | 100% 0.01s

avrdude: Device signature = 0x1e9801 (probably m2560)
avrdude: reading input file "C:\Users\Fujitsu\AppData\Local\Temp\arduino_build_728474/eineLED.ino.ino.hex"
avrdude: writing flash (2730 bytes):

Writing | ################################################## | 100% 0.45s

avrdude: 2730 bytes of flash written
avrdude: verifying flash memory against C:\Users\Fujitsu\AppData\Local\Temp\arduino_build_728474/eineLED.ino.ino.hex:
avrdude: load data flash data from input file C:\Users\Fujitsu\AppData\Local\Temp\arduino_build_728474/eineLED.ino.ino.hex:
avrdude: input file C:\Users\Fujitsu\AppData\Local\Temp\arduino_build_728474/eineLED.ino.ino.hex contains 2730 bytes
avrdude: reading on-chip flash data:

Reading | ################################################## | 100% 0.36s

avrdude: verifying ...
avrdude: 2730 bytes of flash verified

avrdude done.  Thank you.

any suggestions?

[sterretje edit]
Fixed the code tags. [code] should have been on its own line :wink: Thanks for your attempt to use code tags :+1:

2

Looks like the uploading is successful.

3

Post the sketch to see how we can help.

4

this is the sketch, very simple:

int LED1 = 7;

void setup() {
  Serial.begin(9600);
  // put your setup code here, to run once:
  pinMode(LED1, OUTPUT); 
  
}

void loop() {
  // put your main code here, to run repeatedly:
   Serial.println("AAA");
   digitalWrite(LED1,HIGH); //LED on
   delay(1000);//LED activ
    Serial.println("BBBB");
   digitalWrite(LED1,LOW); //LED off
    delay(666);   
}
5

Are you accidentally only hitting the verify button, not the upload button?

It happens.

a7

6

Hi @helmut25,

I uploaded your sketch to a MEGA2560 with a LED connected to digital pin 7 and it worked as expected.

The messages in orange are the upload messages; I get identical messages (except regarding directories or filenames which is normal).

All messages look quite ok ...

If you have not checked the Serial output but only the LED: Can it be you connected the LED to the analog 7 pin instead of digital 7 ... ?

:wink:

7

Can you post a schematic of how it is wired up please?
And a photorgaph so we can see the wires go to where we expect them to.

Possible faults are

  1. The connections are bad, happens alot using solder-less bread board.
  2. The LED is placed the wrong way round.
  3. The series resistor in the LED is too high to see it shining.
8

And …

Leds only work one way round

9

Disconnected from the IDE, I checked with a meter and the LED blinked properly.
So this cannot be the reason.
I will try to give a schematic or a photograph.

thanks so far!

10

I’m puzzled. If you mean the diode testing position of your DMM gave a ‘good’ reading, that still leaves the possibility that @hammy raised.

11

@Terrypin: Yes, but the messages posted tell a different story:

Writing | ################################################## | 100% 0.45s
avrdude: 2730 bytes of flash written

@helmut25:

Could you clarify

  • whether you checked the Serial output also or only the diode?
  • and what do you mean with this:

Disconnected from the IDE I checked it with
a meter and the LED blinked properly.

A "meter" usually does not "blink" an LED ...

12

@helmut25 you haven't addressed that question.

Also I am curious about how you test a blink with a meter. It doesn't rule out the points I made if the connections to the LED is bad, or the LED is the wrong way round.

13

I just found out that the ground was not properly connected.
thanks to everybody for your help, all the same!

14

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