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Topic: Attiny85 Invalid device signature... (Read 2 times) previous topic - next topic

rptw

I've tried google to help solve my problems but as I am completely new to arduino I've tried some stuff and nothing seems to work.  I'm trying to program an Attiny85 using an UNO.
I've followd this guide to the T: http://hlt.media.mit.edu/?p=1695
Once I try to upload a sketch to the Attiny85 I get the invalid signature error
Code: [Select]
avrdude: Device signature = 0xffffff
avrdude: Yikes!  Invalid device signature.
         Double check connections and try again, or use -F to override
         this check.

My wiring (ignore the other part of the breadboard): http://i9.photobucket.com/albums/a84/rptw/IMG_20130125_041529_zpsf24b0b84.jpg

I have since tried to the 2 different ArduinoISP from https://github.com/adafruit/ArduinoISP and https://github.com/wbphelps/ArduinoISP

Please let me know if more information is required, thanks.

Erni

#1
Jan 25, 2013, 10:48 am Last Edit: Jan 25, 2013, 10:54 am by Erni Reason: 1
As far as I can see you are you connecting pin 9 on Arduino to PB3 on attiny85, why is that.

Which version of the Arduino IDE are you using

You could try this core
http://code.google.com/p/arduino-tiny/

using this ISP
http://arduino.cc/forum/index.php/topic,108797.msg824488.html#msg824488  
Reply #39


http://www.ernstc.dk/arduino/attiny85.html

Shpaget

In my recent endeavours with ATtiny45  I experienced that error when the capacitor was not connected.
I also noticed that it did not always achieve proper contact when put in the connectors on the Uno. so I moved it to the breadboard.

rptw


As far as I can see you are you connecting pin 9 on Arduino to PB3 on attiny85, why is that.
Through google, I had come to the conclusion that I have a fuse problem so I was trying to use the ISP that provides a clock on pin9 of the arduino to fix it.  I have since removed the connection in all my attempts with your suggestions.

Which version of the Arduino IDE are you using
1.0.3

using this ISP
http://arduino.cc/forum/index.php/topic,108797.msg824488.html#msg824488  
Reply #39
I had tried that ISP previously as well with no luck.

You could try this core
http://code.google.com/p/arduino-tiny/
http://www.ernstc.dk/arduino/attiny85.html
I followed this guide just not and still no luck.  I even tried to burn the 8Mhz bootloader and I get the exact same error.


In my recent endeavours with ATtiny45  I experienced that error when the capacitor was not connected.
I also noticed that it did not always achieve proper contact when put in the connectors on the Uno. so I moved it to the breadboard.

When the capacitor was not plugged in properly or completely absent I would get the getsync error instead.

Erni

What you could try:

Test if it is a connection problem with your breadboard: move your attiny to another spot on the breadboard or another breadboard.

Output the verbose output and post it here, and hope one of the experts can tell what is wrong

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