Ho to remotely update the NIOS II design without internet, do you have some ideas?

Hello,

Remote System Update can be done through a communication medium, i.e. ethernet, UART, and I2C. Its not compulsory to have internet access to do this job. However, it is needed if your board is not near by you, or its not connected to a local network.

Here are few designs that might help you:

https://fpgacloud.intel.com/devstore/platform/17.1std.1/Standard/i2c-remote-system-update-example/

https://fpgacloud.intel.com/devstore/platform/16.1.0/Standard/max10-remote-system-upgrade-rsu-over-uart-for-nios-ii-processor/

https://fpgacloud.intel.com/devstore/platform/18.0.0/Standard/remote-system-upgrade-with-system-console-for-cyclone-10-lp/

https://fpgacloud.intel.com/devstore/platform/16.0.0/Standard/board-update-portal-based-on-nios-ii-processor-with-epcq/

Hope this might help.