Hi there,

I ordered from ALiExpress 5pcs of ATTiny85-20PU and none of them are working.

Error message apears while recognising the MCUs ID: Invalid device signature 0xffffff

I got this message from avrdude using USBtiny programmer (CMD output).

avrdude -c usbtiny -p t85 -F

avrdude: AVR device initialized and ready to accept instructions

Reading | ################################################## | 100% 0.02s

avrdude: Device signature = 0xffffff (retrying)

Reading | ################################################## | 100% 0.02s

avrdude: Device signature = 0xffffff (retrying)

Reading | ################################################## | 100% 0.02s

avrdude: Device signature = 0xffffff
avrdude: Yikes!  Invalid device signature.
avrdude: Expected signature for ATtiny85 is 1E 93 0B

avrdude: safemode: Fuses OK (E:FF, H:DF, L:62)

avrdude done.  Thank you.

Just to mention, there are no wires, cables or breadboard laying around.

And I tested my old MCU and it's working fine.

p.s. And sorry for the wrong title!

 

And I tested my old MCU and it's working fine.

That's very nice and helpful.

 

That's very nice and helpful.

Your comment was really helpful too!