I added the URL to preferences, no error messages, but ATTINYCORE does not show up in the board manager. Have I forgotten a step?

Hi @mike_trantham . This is caused by a bug in Arduino CLI versions 0.34.0 - 0.34.2, which also affects Arduino IDE versions 2.2.0 - 2.2.1: Package index filename is truncated if it contains `.` opened 08:21AM - 28 Sep 23 UTC …

Thanks @ptillisch , unfortunately now I get: Tool arduino:avr-gcc@7.3.0-atmel3.6.1-arduino7 already installed Downloading packages arduino:avrdude@6.3.0-arduino18 ATTinyCore:micronucleus@2.5-azd1 Failed to install platform: 'ATTinyCore:avr:1.5.0'. Error: 2 UNKNOWN: Get " https://azduino.com/bin…

[image] mike_trantham: Error: 2 UNKNOWN: Get " https://azduino.com/bin/micronucleus/micronucleus-cli-2.5-azd1-x86_64-mingw32.tar.bz2 ": tls: failed to verify certificate: x509: certificate has expired or is not yet valid: @ptillisch Maybe update expects to find the old name, package_drazzy.json …

[image] mike_trantham: unfortunately now I get: Tool arduino:avr-gcc@7.3.0-atmel3.6.1-arduino7 already installed Downloading packages arduino:avrdude@6.3.0-arduino18 ATTinyCore:micronucleus@2.5-azd1 Failed to install platform: 'ATTinyCore:avr:1.5.0'. Error: 2 UNKNOWN: Get " https://azduino.…

Thanks! I appreciate all the effort and expertise that went into this solution.

You are welcome. I'm glad if I was able to be of assistance. Regards, Per

March 1st 2024. This problem persist. http://azduino.com/ link is broken, or site is down. I've been trying to find the micronucleus-cli-2.5-azd1b-x86_64-mingw32.zip file but no luck. Fresh Arduino IDE fails to install Attiny Core due to this broken link.

That is unfortunate. The entire site is down so this is a different situation from before where the files were available, but just not via SSL. I have a copy of the file you need: micronucleus-cli-2.5-azd1b-x86_64-mingw32.zip (1.1 MB) You can follow the "2. Add the Downloaded File to the Boards M…

Thank you very much @ptillisch , due to my bad luck I use Linux, open a new thread in case someone has the file

Hopefully one of the forum helpers will have this file. For the forum helpers, you should have it on your computer if you ever used Arduino Boards Manager to install ATTinyCore version 1.5.2. The file would be located at this path: /home/<username>/.arduino15/staging/packages/micronucleus-cli-2.5-…

ATTINYCORE on IDE 2.2.1

Development Tools IDE 2.x

Brazilino June 7, 2024, 1:00pm 17

Hi! Welcome to the forum!

Take a look at this topic for a workaround:
https://forum.arduino.cc/t/what-is-status-of-attinycore/1266483/2

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ATTINYCORE on IDE 2.2.1

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