I know that Pio core 3.5.0 up can compile without internet and disabling pio upgrade, but if the some library that define depedencies on their library.json, the error: you are not connected to internet is coming up again. here the verbose output.
Library Storage: /home/farid/Code/Firmware/blumbangreksa-firmware/.piolibdeps LibraryManager: Installing id=31 Adafruit Unified Sensor @ 1.0.2 is already installed LibraryManager: Installing id=1284 @ ^0.2.2 AnalogPHMeter @ 0.2.2 is already installed LibraryManager: Installing id=54 DallasTemperature @ 3.7.8 is already installed Installing dependencies Looking for OneWire library in registry Error: You are not connected to the Internet. If you build a project first time, we need Internet connection to install all dependencies and toolchain.
Some times i need to program in remote location that has no internet connection so this is a pain.