Educational version with comprehensive comments for students. - Reads PM1.0, PM2.5, and PM10 concentrations from NextPM sensor - Uses UART serial communication with checksum validation - Non-blocking timing with millis() - Removed particle counts, kept only mass concentrations - Extensively commented to help students understand serial protocols 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>
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