Note that there are USB cables that don't have the data lines in the cable but only power and ground. After I had burned a new boot loader with this Arduino version into the ATmega328, uploading worked again. Unfortunately, it is not always possible to program a new boot loader if there is no SPI connector. I could not upload sketches to these boards with the Arduino version 1.8.9. I experienced this with boards with an ATmega328 that I had let fabricate in China. Old bootloader upload problems with Arduino Nano and Pro-Mini boardsĪ very difficult problem is a bootloader that is not supported. The processor menu only appears if the Arduino Nano is first selected Tools> Processor> ATmega328P (Old Bootloader) The reason is that old Nano boards have an outdated bootloader, which then no longer works with the new Arduino IDE versions. In this case, select the following in the tools menu: That is strange, it has always worked before! The same happens with an Arduino Pro-Mini board. But suddenly, error messages occur when uploading a sketch. Some years ago, I used an Arduino Nano board. Old bootloader upload problems with Arduino Nano and Pro-Mini boards Let me know if a library or sketch doesn't work and I will update the library zip file. I have collected all those libraries in a zip file that you can download HERE. Sometimes I forget to update the zip file so it can happen that something is missing: I use many libraries, those of others and of myself. For instance when the library "Timer1" is missing, we receive the compiler message: "'Timer1' was not declared in this scope", than you have to install this library too. If an Arduino library or a sketch of mine doesn't work, it's usually because of missing libraries. The pins PE0 and PE1 can be used as digital I/O as follow: pinMode(SDA1, OUTPUT) // SDA1 = PE0ĭigitalWrite(SCL1, 1) Installing missing libraries Variant = 328PB How to use pin PE0 and PE1 We have to install the MiniCore, see all the information at GitHub įile > preference > Additional Boards Manager URL = The ATmega328PB has two extra I/O pins: PE0 and PE1.The ATmega328PB (with the B) is the successor of the ATmega328P. Use the MiniCore for programming the ATmega328PB All relevant keywords are being highlighted by the IDE through a separate keywords file.PB6 and PB7 is mapped to Arduino pin 20 and 21.Two extra I/O pins if the internal oscillator is used.Arduino cores for the ATmega328PB, ATmega328, ATmega168, ATmega88, ATmega48 and ATmega8.For the manufacturer, this represents a risk as they may be liable for the repairs. To prevent problems, it is actually sufficient to protect only the crystal circuit with lacquer. The above poses a problem: a product with a microcontroller can be "damaged" by accidental or intentional contact with the oscillator pins or by temporary contact with water. To address this issue, the chip needs to be reprogrammed by the manufacturer. I have tested what can happen when the clock generator is disturbed: the processor can accidentally write to the program memory, rendering the chip essentially useless, and the product will no longer function. Upon drying and restarting, the processor should, in principle, function normally again. The same can happen in the presence of moisture. The processor can then exhibit unpredictable behavior. The clock generator of a microcontroller is particularly sensitive, and its operation can be disrupted if the pins of the crystal are accidentally touched. With this topic, I want to point out that disruption of the clock oscillator can lead to permanent "damage" because the program memory is sometimes overwritten. Touching atmega clock pins can change program memory Start > Settings > Update & Security > Windows Security > Virus & threat protection > Manage settings > Exclusions > Add or remove exclusions > (Windows security YES) > Add an exclusion: C:\Program Files (x86)\Arduino\arduino.exe. The solution is to exclude any files opened by Arduino.exe from Windows Defender. This is the procedure: ![]() In August 2022, I couldn't save sketches anymore and got this error message: java.io.IOException: The system cannot find the file specifiedĪt java.io.WinNTFileSystem.createFileExclusively(Native Method)Īt java.io.File.createTempFile(File.java:2024)Īt (BaseNoGui.java:886)Īt (SketchFile.java:287)Īt (Sketch.java:138) java.io.IOException conflict with Windows Defender This article lists many common problems that may occur when using with Arduino.
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