Please help...Invalid Device Signature with ATtiny85

Other Hardware 3rd Party Boards
1

I need help with just programming a single avr microcontroller ATtiny85. But it keep giving me this error when I simply try to burn a bootloader. It has been many hours trying and failing to get this to work and I am tempted to just take hammer to it. All the connections are correct and none of connections are crossing over or broken or anything.

I am using an Arduino MKR 1300 WAN as the programmer and the ATTinyCore library. Also, the microcontroller was new and was purchased today. Please if you can help, I would appreciate it.

Log Below:

Arduino: 1.8.5 (Windows 10), Board: "ATtiny25/45/85, Disabled, CPU, ATtiny85, 8 MHz (internal), EEPROM retained, B.O.D. Disabled"

C:\Users\Regan\AppData\Local\Arduino15\packages\arduino\tools\avrdude\6.3.0-arduino9/bin/avrdude -CC:\Users\Regan\AppData\Local\Arduino15\packages\ATTinyCore\hardware\avr\1.2.2/avrdude.conf -v -pattiny85 -carduino -PCOM3 -b19200 -e -Uefuse:w:0xFF:m -Uhfuse:w:0b11010111:m -Ulfuse:w:0xE2:m

avrdude: Version 6.3, compiled on Jan 17 2017 at 12:00:53
Copyright (c) 2000-2005 Brian Dean, http://www.bdmicro.com/
Copyright (c) 2007-2014 Joerg Wunsch

System wide configuration file is "C:\Users\Regan\AppData\Local\Arduino15\packages\ATTinyCore\hardware\avr\1.2.2/avrdude.conf"

Using Port : COM3
Using Programmer : arduino
Overriding Baud Rate : 19200
Setting bit clk period : 5.0
AVR Part : ATtiny85
Chip Erase delay : 400000 us
PAGEL : P00
BS2 : P00
RESET disposition : possible i/o
RETRY pulse : SCK
serial program mode : yes
parallel program mode : yes
Timeout : 200
StabDelay : 100
CmdexeDelay : 25
SyncLoops : 32
ByteDelay : 0
PollIndex : 3
PollValue : 0x53
Memory Detail :

Block Poll Page Polled
Memory Type Mode Delay Size Indx Paged Size Size #Pages MinW MaxW ReadBack

eeprom 65 12 4 0 no 512 4 0 4000 4500 0xff 0xff
flash 65 12 32 0 yes 8192 64 128 30000 30000 0xff 0xff
signature 0 0 0 0 no 3 0 0 0 0 0x00 0x00
lock 0 0 0 0 no 1 0 0 9000 9000 0x00 0x00
lfuse 0 0 0 0 no 1 0 0 9000 9000 0x00 0x00
hfuse 0 0 0 0 no 1 0 0 9000 9000 0x00 0x00
efuse 0 0 0 0 no 1 0 0 9000 9000 0x00 0x00
calibration 0 0 0 0 no 2 0 0 0 0 0x00 0x00

Programmer Type : Arduino
Description : Arduino
Hardware Version: 2
Firmware Version: 1.18
Topcard : Unknown
Vtarget : 0.0 V
Varef : 0.0 V
Oscillator : Off
SCK period : 0.1 us

avrdude: AVR device initialized and ready to accept instructions

Reading | ################################################## | 100% 0.00s

avrdude: Device signature = 0x000000 (retrying)

Reading | ################################################## | 100% 0.00s

avrdude: Device signature = 0x000000 (retrying)

Error while burning bootloader.
Reading | ################################################## | 100% 0.00s

avrdude: Device signature = 0x000000
avrdude: Yikes! Invalid device signature.
Double check connections and try again, or use -F to override
this check.

avrdude done. Thank you.

This report would have more information with
"Show verbose output during compilation"
option enabled in File -> Preferences.

2

That indicates either a wiring problem, or that you previously tries to 'burn bootloader' on that chip with external crystal selected as clock source but no crystal is present

3

Hello there. I do not have a crystal in possession to previously set it like that. However, I will try to get
a crystal as I have checked my wiring rather extensively. However, why would it be set with crystal initially if it was brand new?

4

It would not be. A new virgin attiny is set to use internal oscillator at 1MHz.

So it sounds like it in fact is a wiring error? Check with multimeter for continuity to each pin. Make sure you're using the SPI pins on the MKR, which will have different numbers than the SPI pins on Uno/etc.

There may also be some specific caveats for the MKR that I'm not aware of. I've only ever worked with the AVR arduinos. If you have an Uno/Nano/ProMini/Leonardo/Micro - those might work better.

5

Also, how are you powering the ATTiny? And do you have a 100nF decoupling capacitor?