Uploading Sketches to ATtiny85 using Arduino Uno R4 wifi

Official Hardware UNO Family UNO R4 WiFi
1

Hi, I was doing a hobby project for which I was using the Uno R4 wifi as an ISP to program the Attiny85. This worked 2 months ago, using the explenation from this post: Arduino UNO R4 WiFi as bootloader burner. I started again this week, but ran into the following error:

Error: programmer is not responding
Warning: attempt 1 of 10: not in sync: resp=0x00
Error: programmer is not responding
Warning: attempt 2 of 10: not in sync: resp=0x00
Error: programmer is not responding
Warning: attempt 3 of 10: not in sync: resp=0x00
Error: programmer is not responding
Warning: attempt 4 of 10: not in sync: resp=0x00
Error: programmer is not responding
Warning: attempt 5 of 10: not in sync: resp=0x00
Error: programmer is not responding
Warning: attempt 6 of 10: not in sync: resp=0x00
Error: programmer is not responding
Warning: attempt 7 of 10: not in sync: resp=0x00
Error: programmer is not responding
Warning: attempt 8 of 10: not in sync: resp=0x00
Error: programmer is not responding
Warning: attempt 9 of 10: not in sync: resp=0x00
Error: programmer is not responding
Warning: attempt 10 of 10: not in sync: resp=0x00
Error: unable to open port COM7 for programmer arduino
Failed chip erase: uploading error: exit status 1

I have unfortunately not managed to figure out why it won't work anymore. I have checked the wiring multiple times. My R4 does work as it should when I ran basic sketches on it. Does anybody have an idea?

2

Hi @patrickprins16. Did you upload the File > Examples > 11.ArduinoISP > ArduinoISP sketch to the UNO R4 WiFi board?

The board must be running this sketch in order be used as an "Arduino as ISP" programmer. If you upload a different sketch to the UNO R4 WiFi board, it erases the "ArduinoISP" sketch and so the board will no longer work as a programmer after that until you have uploaded the "ArduinoISP" sketch to it once again.

3

Hi, Yes I did! But still wouldn't work!

4

This part is odd:

Do you see a COM7 in Arduino IDE's Tools > Port menu?

5

Did you figure this out? Getting the same error with R4 Minima and attiny84