From pipeline SCADA to 15 million tags — how MQTT, Sparkplug, and the Unified Namespace became the industrial backbone

<p>This episode is brought to you by Cirrus Link Solutions and Canary Labs.</p><p>Cirrus Link: <a href="https://unpluggediiot.com/go/cirrus-link" target="_blank" rel="noopener noreferer">https://unpluggediiot.com/go/cirrus-link</a></p><p>Canary Labs: <a href="https://unpluggediiot.com/go/canary-labs" target="_blank" rel="noopener noreferer">https://unpluggediiot.com/go/canary-labs</a></p><p><br></p><p>---</p><p><br></p><p>Arlen Nipper — MQTT co-inventor and President &amp; CTO of Cirrus Link Solutions — returns for his third appearance on Unplugged.</p><p><br></p><p>Twenty-five years after co-inventing MQTT to connect an oil pipeline over a satellite link in the Middle East, Arlen walks through the current state of the protocol: 15 million tags in a single deployment at millisecond SLAs, a UNS market that has grown to $2B+, and why data centre operators are choosing MQTT 3.1.1 over MQTT 5.</p><p><br></p><p>Topics covered:</p><p>- The UNS market arc: from cryptic tags to $2B+ and what changed</p><p>- 15 million tags at a 3-second SLA: report-by-exception at scale</p><p>- Nextera Energy: 524 solar, BESS and wind sites in one Remote Operations Centre</p><p>- How data centres became AI factories — and why MQTT won</p><p>- A large customer&#39;s white paper rejecting MQTT 5 entirely</p><p>- The AI + UNS framework: decouple, define the UDT, train AI on the live feed</p><p>- Sparkplug v4: alarms over MQTT and event pipelines</p><p>- The ProveIt! Lifetime Award and the NVIDIA acceptance speech</p><p>- ICC 2026: what to expect from the AI-first year</p><p><br></p><p>Guest: Arlen Nipper — President &amp; CTO, Cirrus Link Solutions | MQTT co-inventor</p><p><br></p><p>Episode page: <a href="https://unpluggediiot.com/episodes/ep-60-mqtt-sparkplug-unified-namespace" target="_blank" rel="noopener noreferer">https://unpluggediiot.com/episodes/ep-60-mqtt-sparkplug-unified-namespace</a></p><p><br></p><p>Chapters:</p><p>00:00 Introduction</p><p>05:00 Co-inventing MQTT in 1999</p><p>12:00 From cryptic tags to $2B+: the UNS market</p><p>18:00 15 million tags at a 3-second SLA</p><p>25:00 Nextera Energy: 524 sites in one ops centre</p><p>32:00 Data centres become AI factories</p><p>40:00 AI + UNS: the single source of truth</p><p>47:00 Sparkplug v4: alarms over MQTT</p><p>52:00 MQTT 3.1.1 vs MQTT 5</p><p>57:00 The ProveIt! Lifetime Award</p><p>61:00 ICC 2026</p><p><br></p><p>---</p><p><br></p><p><a href="Cirrus Link Solutions: https://unpluggediiot.com/go/cirrus-link" target="_