Can you share how the scripts work? That seems to be the most interesting part, but is omitted from the article. The only technical details are UART + an opto-coupler.

> Both devices run custom scripts designed to handle data transmission reliably rather than quickly. This approach limits throughput, but reliability is paramount for critical monitoring, where losing data is unacceptable. The scripts are finely tuned to ensure that every log entry is transmitted securely without risk of cross-contamination between networks.