@bigjosh Thanks for looking at this, unfortunately though I still seem to be getting that error:
arduino-cli core update-index --additional-urls https://raw.githubusercontent.com/Move38/Blinks-SDK/master/package_move38.com-blinks_index.json
Updating index: package_index.json downloaded
Updating index: package_move38.com-blinks_index.json downloaded
Error updating index: invalid package index in https://raw.githubusercontent.com/Move38/Blinks-SDK/master/package_move38.com-blinks_index.json: invalid character ']' looking for beginning of value
Is there maybe another URL I should be using instead? I did get a step closer yesterday by updating the “data directory” in my config to point to the location where I installed the Blinks SDK originally, which is where the BlinkBIOS.hex file was being stored, but I was met with a rather vague error when uploading:
arduino-cli upload -b Move38-Blinks-Library:avr:blink -programmer
Downloading missing tool builtin:ctags@5.8-arduino11...
builtin:ctags@5.8-arduino11 already downloaded
Installing builtin:ctags@5.8-arduino11...
builtin:ctags@5.8-arduino11 installed
Downloading missing tool builtin:serial-discovery@1.0.0...
builtin:serial-discovery@1.0.0 already downloaded
Installing builtin:serial-discovery@1.0.0...
builtin:serial-discovery@1.0.0 installed
Updating index: library_index.json downloaded
Error during Upload: There were errors loading platform indexes
Running that command yesterday with the verbose flag yielded the same error. Another step I tried was running arduino core update-index, which seemed to be successful, as this was part of the output:
INFO[0003] Loading package Move38-Blinks-Library from: /Users/JonathanWest/Documents/Arduino/hardware/Move38-Blinks-Library
INFO[0003] Loaded platform platform="Move38-Blinks-Library:avr@"
INFO[0003] Loading package packages from: /Users/JonathanWest/Documents/Arduino/hardware/packages
INFO[0003] Loading package tmp from: /Users/JonathanWest/Documents/Arduino/hardware/tmp
INFO[0003] Adding libraries dir dir=/Users/JonathanWest/Documents/Arduino/libraries location=user
INFO[0003] current best: Move38-Blinks-Library:avr@ bundle=false managed=false version=
INFO[0003] Adding libraries dir dir=/Users/JonathanWest/Documents/Arduino/hardware/Move38-Blinks-Library/avr/libraries location=platform
Now however I’m back to the issue where the program is looking for a hex file within the sketch folder - more or less square one 