Hi Besserwessi,

der AVRDrude meldet
avrdude.exe: AVR device not responding
avrdude.exe: initialization failed, rc=-1
Double check connections and try again, or use -F to override
this check.

Bascom meldet
Could not identify chip with ID:FFFFFF

Wenn ich im AVRDrude die Option -F mit gebe gibt es mehr Infos
avrdude.exe: AVR device not responding
avrdude.exe: initialization failed, rc=-1
avrdude.exe: AVR device initialized and ready to accept instructions
avrdude.exe: Device signature = 0xffffff
avrdude.exe: Yikes! Invalid device signature.
avrdude.exe: Expected signature for ATMEGA644 is 1E 96 09
avrdude.exe: reading efuse memory:
avrdude.exe: writing output file "d:\TEMP\efuse35082.hex"
avrdude.exe: reading hfuse memory:
avrdude.exe: writing output file "d:\TEMP\hfuse35081.hex"
avrdude.exe: reading lfuse memory:
avrdude.exe: writing output file "d:\TEMP\lfuse35080.hex"

Also die Signatur kann scheinbar gelesen werden.
Keine Ahnung was das bedeutet