Programing issues

Hardware
1

Hi Im still waiting for my USBasp to arrive

so thought id have a go with my arduino in isp

but get this following error any idea why this would be ?

~/Downloads $ sudo avrdude -C avrdude.conf -P /dev/ttyUSB0 -c arduino -p t841

avrdude: AVR device initialized and ready to accept instructions

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

avrdude: Device signature = 0x1e950f
avrdude: Expected signature for ATtiny841 is 1E 93 15
Double check chip, or use -F to override this check.

avrdude done. Thank you.

2

1e950f is the device signature for an atmega328p, which is probably your arduino ISP.

This might also help you:

3

Went back to this today can flash blink code to an ATTiny 85 using Arduino IDE so rules out bad Arduino HW

My problems must be in config

4

Was that using avrdude from the commandline, or using the Arduino IDE?

5

I think your problem is with your stated avrdude command, you’re trying to use avrdude to program the Arduino (the -c arduino in your commandline), and not use it as a programmer to program your ATTiny.

As per that link I shared, you need to tell avrdude the arduino is an ISP (assuming it is running the ArduinoISP sketch as you indicated) and you do that by using -c avrisp.

6

I’ve sorted it I need to add " -b 19200 " to the command and it flashed fine

Another side issue was it was failing verification turns out not all Arduinos are born equal