01 · BUILDING AUTOMATION
NODVIA & automation
BACnet, Modbus, KNX, Climatix, commissioning, HMI and the future of semantic buildings.
PICALLW KNOWLEDGE
From a problem to usable knowledge.
PICALLW Knowledge is more than a list of posts. Content is organised into practical learning paths: building automation, Digital Radionics, human measurement and complex-system research.
START HERE
Four PICALLW knowledge paths.
Start with the field that matters to you, then move from fundamentals to deep technical guides, research articles and working tools.
02 · DIGITAL RADIONICS
Radionics software & symbolic research
Digital radionics software, repeatable protocols, sigils, symbolic matrices, subjective feedback, ethics and evidence boundaries.
03 · GDV / HRV / ECG
Measurement & research
The physical basis of GDV/EPI, capture quality, morphology, repeatability, personal baselines and combined HRV/ECG analysis.
04 · COMPLEX SYSTEMS
Technology & Research
Time series, the World State Vector, correlations, lag analysis, Mutual Information, FDR, discovery and independent validation.
COMPARISONS
When does each technology make sense?
Neutral comparisons without declaring a winner — capabilities, limitations and typical use cases.
BACnet vs Modbus vs KNX
Which protocol fits each layer of building automation?
Read comparison →Android HMI vs dedicated touch panel
Cost and flexibility versus robustness and lifecycle.
Read comparison →NODVIA Field vs protocol scanner
Multi-protocol workflow versus a small focused tool.
Read comparison →GDV Studio vs traditional GDV analysis
Morphology, repeatability and personal baseline versus a traditional report.
Read comparison →Digital radionics app vs machine
Software repeatability versus a physical/tactile workflow.
Read comparison →FREE TOOLS
Small tools for quick engineering checks.
Browser-based calculators and checkers for BACnet, Modbus, KNX, HVAC and basic GDV image capture quality. They are intended for fast secondary checks, not as a replacement for device documentation or commissioning procedure.
BACnet Device ID checkervalid range · duplicates · wildcardModbus value converter16/32-bit · Float32 · byte/word orderModbus RTU CRC-16calculation · frame verificationKNX Group Address helper3-level · 2-level · raw 16-bitHVAC PI/PID calculatorSIMC PI · Ziegler–NicholsGDV Image Quality demosharpness · clipping · contrast · centering
PICALLW APPROACH
Useful knowledge also shows its limits.
Technical content separates standards, actual implementation and field engineering experience. Research content separates measurement, statistical association and interpretation.
Example: Pineal decalcification — separating measurable physiology from an unsupported claim →
01PracticalA guide should solve a real problem, not merely describe a technology.
02VerifiableWhere useful, we link standards, technical documentation and research sources.
03TransparentExperimental features, limitations and uncertainty are stated clearly.
04LivingCore field guides evolve as the tools and engineering experience evolve.
57+ TECHNICAL & RESEARCH ARTICLES
Continue into the full PICALLW blog.
Browse by category, use the latest-articles list, or search for a specific technical problem.