Day 14 – Advanced Loops + BACnet RPM Chunking | Avoiding Segmentation Errors (Theory + Vibe Code) скачать в хорошем качестве

Day 14 – Advanced Loops + BACnet RPM Chunking | Avoiding Segmentation Errors (Theory + Vibe Code)

Welcome to Day 14 of the BACnet with Python for Building Automation Engineers course. Today was theory plus real-world implementation. Because as our BACnet RPM app grows… so does the size of our requests. --- First, theory. We covered: • nested loops • while True patterns • break • continue • sentinel-style looping Because real automation scripts don’t always know: how long to run how much data will arrive how many retries are needed They run continuously until told to stop. Lesson notes: --- Then we added something very important to our Vibe Code App for Checkpoint 2: RPM chunking. Many field devices… especially older or low-cost controllers… do not support segmentation. If you request too many points in one ReadPropertyMultiple… they may: abort timeout or fail intermittently So we added logic to: • split RPM requests into smaller chunks • send multiple safe batch reads • merge the results back together • avoid segmentation-not-supported errors Now our script: • reads VAV and AHU continuously • rotates CSV daily • rewrites headers if missing • retries writes • and chunks RPM requests safely This is no longer just about reading BACnet data. It’s about reading it reliably from real field controllers. Chunking makes the difference between: a script that works in the lab and a scraper that survives on MS/TP devices in production. We also used ChatGPT to help structure the chunking logic without losing control of the BAC0 request format. Code reference: --- Full course + repo: https://github.com/bbartling/py-bacne... If you’re deploying Raspberry Pi collectors in buildings, this is the kind of feature that keeps your app from randomly failing overnight. More vibe coding tomorrow. #vibecoding #bacnet #python #hvac #buildingautomation #controlsengineering #smartbuildings #automation #iot #bac0 #raspberrypi #engineering #programming #opensource #hvaccontrols #hvacoptimization