Bootloading ATtiny85 with Micronucleus

Development Tools IDE 1.x
1

Hello, I am trying to bootload my Attiny85 with Micronucleus. I have successfully done it using the Attiny85 chip, however, I am trying to do it with a QFN Attiny85 that I bought from digikey.

Link: ATTINY44V-15MT Microchip Technology | Integrated Circuits (ICs) | DigiKey

However, when I try to do the same process that I did on the Attiny85 normal package:

Image: https://www.microchip.com/wwwproducts/en/ATtiny85

I keep getting the error

avrdude: Device signature = 0xffffff (probably .reduced_core_tiny)
avrdude: Yikes! Invalid device signature.
Double check connections and try again, or use -F to override
this check.

I have looked it up but am still unsure of what to do.

Is there a different way you are supposed to do it with a QFN Attiny85 Chip?

Here is the tutorial I used:

AND

Please Help!

I am trying to make a mini-arduino

Thanks,

-TechBoy

2

Hi,

got a similar issue with just a classic DIP AtTiny85, and "chinese quality" breadboard. Looks like the best solution here is to check carefully all wiring one by one, 0x000000, 0xFFFFFF or any combination of 2 bytes with FF, like 0xFF0000, suggest wiring issue.

On the other hand, have you checked the pinout of the AtTiny44 ? The chip may have different pinout and you may have missed the pin 1, but it's hard to tell without any picture at all.

Hope this help.

(be careful of so called "tutorial", usually people copy thing they see here or there but they mostly don't understand everything, especially those who make an "everything's fine" tutorial, what to do in case of trouble ??? 'Do it yourself' here too unfortunately)

3

TechBoyInventor:
Hello, I am trying to bootload my Attiny85 with Micronucleus. I have successfully done it using the Attiny85 chip, however, I am trying to do it with a QFN Attiny85 that I bought from digikey.

Link: ATTINY44V-15MT Microchip Technology | Integrated Circuits (ICs) | DigiKey

JusTiCe8 did touch on this tangentially, but just to be clear- the chip you have bought isn't an ATTiny85, it is an ATTiny44.

4

I have also faced the same booting error when I tried to load the ATtiny85 on my HP laptop. But this is not such a difficult issue to solve out. I just go to HP Australia Support and all the suggestions are well mentioned over there and all are very helpful to fix this error.