Free practice for building automation techs
Practice the problem before you’re standing in front of it.
Hands-on labs, an offline troubleshooting assistant and field tools, built by a working BAS technician. Vendor neutral, and no account needed.
Press Go and the Troubleshooter takes it from there. Or pick a lab, tool or article from the list.
- 8labs
- 141exercises
- 18field tools
- 34articles
- Offlineonce installed
Three ways in
Pick the one that matches why you’re here today.
Troubleshoot a problem
Describe it in your own words. The Troubleshooter asks one question at a time, explains why each check matters, and works with no signal.
Open the Troubleshooter → Build skillsPractice in a lab
Real faults in simulated equipment, networks and programs. Learn with the tutorial, practice on your own, then take a timed test.
Choose a learning path → Need an answerLook it up
Signal scaling, Modbus decoding, BACnet object IDs, subnets and ports, plus printable field reference cards.
Open the field tools →Learning paths
Eight labs, grouped by the layer they teach. Start at the top of any path. Every lab has free exercises you can open right now.
Troubleshooting
33 exercisesEquipment, sensors, safeties and control loops. Find which layer broke.
Networks and protocols
66 exercisesBACnet/IP, MS/TP, Modbus and LonWorks, from the wire up.
Programming
21 exercisesBlock logic on any platform: execution order, priority, timers, building sequences and porting.
Security
21 exercisesBACnet/SC, segmentation, remote access and site audits, from the field side.
New this month
The latest labs and field notes.
- Lab · Security
BACnet/SC Capture Lab
Read encrypted BACnet in a capture window: certificates, hubs, firewalls and TLS key logs.
- Lab · Security
Security Audit Lab
Walk a building’s network, find the gaps, fix them without taking the building down, and verify.
- Section · Learn
Cybersecurity for the field tech
A ten-point site check and eleven articles on BACnet/SC, segmentation, remote access and the first hour.
Built by a tech, backed by the books
Scott Draper is a Senior Building Automation Specialist and Niagara N4 Certified professional. He began as a nuclear machinist’s mate in the U.S. Navy, where troubleshooting was the job. Every lab and article here follows the method in his three BAS Field Reference books: trace down until the evidence stops agreeing.
- Vendor neutral
- No account
- Progress stays on your device
- Works offline
Equipment layer
Network layer
Logic layer