I have some issues with my Digispark ATtiny85 board. If I upload the blink sketch for example the LED starts blinking and everything looks fine. But as soon as I unplug the Digispark from the USB port and plug it back in nothing happens. I know that the programm starts with a delay of 5 seconds so programming via USB becomes possible, but still nothing. Its seems like the flash-memory (where the programm is stored) of the ATtiny 85 is empty.
Here is the example blink sketch:
// the setup routine runs once when you press reset:
void setup() {
// initialize the digital pin as an output.
pinMode(0, OUTPUT); //LED on Model B
pinMode(1, OUTPUT); //LED on Model A
}
// the loop routine runs over and over again forever:
void loop() {
digitalWrite(0, HIGH); // turn the LED on (HIGH is the voltage level)
digitalWrite(1, HIGH);
delay(1000); // wait for a second
digitalWrite(0, LOW); // turn the LED off by making the voltage LOW
digitalWrite(1, LOW);
delay(1000); // wait for a second
}
I also tried uploading the sketch from a Laptop running on Windows but without success.
I am using Linux Mint and Arduino IDE 1.8.10.
Since I am new to Microcontrollers, I would be grateful for explainations, tipps or useful links. Thank you!
Or could a floating reset pin be the reason for this behavior?
the official digispark has the reset pin disabled, so you get an extra GPIO pin. So it can't be a floating reset pin. – Gerben Dec 17 '19 at 15:32