Day 4 – Booleans, Comparisons, and Alarm Logic in Python | Smart BACnet Read Script with BAC0 скачать в хорошем качестве

Day 4 – Booleans, Comparisons, and Alarm Logic in Python | Smart BACnet Read Script with BAC0

Welcome to Day 4 of the BACnet with Python for Building Automation Engineers course. Today we move beyond just reading values… and start thinking like controls programmers. Because real HVAC software isn’t just “read a sensor.” It’s: Is the value valid? Is it too high? Should we alarm? Is metadata missing? Is this safe to trust? That’s where Boolean logic and comparisons come in. In this lesson we learn how Python makes decisions using numbers, Booleans, and conditional logic — then we immediately apply it to a real BACnet read script. We even use ChatGPT to help enhance yesterday’s simple read request into something that looks much more like a real BAS program. Now our script: • reads present-value, description, and units • validates the data type • checks for missing values • applies engineering limits • evaluates alarm thresholds • prints NORMAL / WARNING / HIGH ALARM states Basically… we just built a tiny software point with alarm logic. Exactly the kind of logic you’d write inside a JACE, controller, or Niagara Program Object. Today we cover: • integers vs floats • True False (Booleans) • comparison operators • chained comparisons • truthiness checks • combining conditions with and / or • writing clean if elif else logic • turning raw sensor data into actionable decisions By the end, you’ll understand how to: read a BACnet point evaluate it and make smart decisions automatically This is where scripting starts to feel like real building automation. Lesson file: https://github.com/bbartling/py-bacne... Full course + code: https://github.com/bbartling/py-bacne... If you’re an HVAC tech or controls engineer who wants to stop manually checking values and start automating logic… this is the skill that unlocks everything. See you in Day 5. #vibecoding #hvaccontrols #bacnet #python #hvac #buildingautomation #controlsengineering #smartbuildings #automation #iot #bac0 #engineering #programming #opensource