Resources for
Technical guides, troubleshooting resources, assessments and practical tools for building automation engineers, integrators and commissioning professionals.
Learn the fundamentals, troubleshoot real systems and test your technical knowledge. This page collects LumiBMS material tagged for building automation professionals.
A practical manufacturer-focused approach to Modbus register-map design, based on how PLC and BMS integrators actually consume a device interface.
A 30-question technical building automation assessment selected from a 120-question bank across six engineering domains.
A practical guide to P, PI and PID control in building automation, including proportional band, reciprocal 1/P 1/I 1/D forms, tuning, pulse outputs, process dynamics and HVAC …
A focused explanation of Modbus protocol offsets, one-based register numbers and 40001-style references with practical examples.
A practical guide to how building automation sensors turn temperature, pressure, CO₂, humidity and other physical quantities into resistance, analog signals and digital values, …
Learn why antenna orientation matters and how vertical versus horizontal placement can affect wireless links.
Practical RS-485 wiring checks for Modbus RTU installations that work intermittently, fail after expansion or never respond at all.
Compare 868 MHz and 2.4 GHz for building automation, including path loss, penetration, antenna size, congestion and typical use cases.
Interactive air handling unit simulator with live HVAC controls, PI regulation, room dynamics, heat recovery and alarms.
Practical wireless building automation guide covering RF fundamentals, frequency bands, antennas, interference, signal quality and gateway placement.
A practical method for finding why a valid Modbus response becomes the wrong engineering value in a PLC, BMS or commissioning tool.
Practical Modbus RTU and TCP guide covering RS-485, registers, frames, function codes, CRC, raw values and troubleshooting.
A symptom-based Modbus RTU troubleshooting guide for no response, timeouts, exception replies, wrong values and intermittent communication.
A practical pre-release Modbus test plan that checks the interface from the customer's side instead of only proving that basic communication works.
The purpose of this site is to teach and share automation and programming knowledge through various tools, guides, and articles.
A practical guide to digital and analog BMS I/O, electrical signal types, wiring methods, sensors, actuators, relays, current loops, and troubleshooting.
Identify unknown passive temperature sensors and convert resistance to temperature using standardized and common HVAC sensor curves.
Free online Modbus decoder and parser for Modbus RTU and Modbus TCP frames. Decode function codes, device addresses, register addresses, values, CRC results and exception responses …
