Datasheet
As before, type out the command, then press the reset button to start the bootloader and once the
red LED is pulsing, hit return
When uploading, you will see a lot of avrdude: 8 retries during SPI command and similar
warnings. THIS IS OK! Because of the way the ATtiny85 works, there's a small delay when writing
the new program to flash, and during that delay, it cannot save the data and also send USB data at
the same time. This causes the USB reply to avrdude to be delayed and avrdude to spit out the
retry alert.
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