Verification Error

[amp138]

Hi all,

I’m getting an error on both my controllino mini boards. I have searched and searched for answers and all I can find it my bootloader size might be too small or I need to burn my bootloader.

However, my issue seems to be unique to others. I have errors (such as quoted below) but sometimes the error is removed by uploading a second time. Other times it won’t disappear upon re-uploading but if I leave it for an hour and try again, the sketch will upload with no problem. I have fun complicated programs and very simple programs and they sometimes upload.

The code that produced the below error is:

“void setup() {

// put your setup code here, to run once:

Serial.begin(9600);

pinMode(4, OUTPUT);

}

void loop() {

// put your main code here, to run repeatedly:

Serial.print(“Hello Worldn”);

digitalWrite(4, HIGH);

delay(500);

digitalWrite(4, LOW);

delay(500);

}”

The verification error it is producing is:

“Arduino: 1.8.10 (Mac OS X), Board: “CONTROLLINO MINI”

Sketch uses 1948 bytes (6%) of program storage space. Maximum is 32256 bytes.

Global variables use 198 bytes (9%) of dynamic memory, leaving 1850 bytes for local variables. Maximum is 2048 bytes.

avrdude: verification error, first mismatch at byte 0x0042

0x8a != 0x8f

avrdude: verification error; content mismatch

avrdude: verification error; content mismatch”

If anyone has some guidance, your help is greatly appreciated.

Kind regards,

Aidan

[Lukas]

Hi Aidan,

please see our FAQ#10.

We are not able to reproduce it here, but still trying to find the root cause.

It seems to be somehow related to the

Code:

delay()

function.

Thanks,

Lukas

[Lukas]

I have some news regarding this topic – we have found some potential root cause of these troubles in the original Arduino bootloader.

Please see this tutorial THIS TUTORIAL how to update to the new MINI bootloader.