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Imx8m Plus
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4 issues matching filters
Imx8m Plus
- Field NotesJun 1, 2026
Isolation Forest in 80 lines of Python, against the vendor 'AI/ML machine health' pitch
The model layer on top of the open IIoT stack. Scikit-learn trained on InfluxDB data, anomaly scores written back, Grafana renders the result on the same dashboard. What the model catches that the threshold rules miss, and what the $1,200-per-asset SaaS sells on top.
Issue 05 stood up Grafana, InfluxDB, and Telegraf on the same $5.50/mo Hetzner VM that runs the Sparkplug B broker. The alerts in that issue were threshold rules: RMS velocity above ISO 10816 Class II, drive current above 110% nameplate, anomaly score above a fixed line. Issue 06 builds the model that produces the anomaly score, in 80 lines of Python. Scikit-learn Isolation Forest, trained nightly on the prior 14 days of telemetry from InfluxDB, scoring live frames every 10 seconds and writing the score back as its own measurement. The comparison: the same vendor SaaS quote from issue 05, this time looking at what its 'AI-driven machine health' line item actually buys on top of the open implementation. The model catches one real failure pattern that the threshold rules miss. It also produces a class of false positives that the threshold rules do not. The honest read on which of the two layers should sit in front of the maintenance team.
Isolation Forest·Scikit Learn·Anomaly Detection·Machine Learning·Self Hosted·Influxdb - Field NotesMay 25, 2026
Grafana plus InfluxDB on $5.50/mo, against the vendor 'machine health platform'
Self-hosted observability on the same Hetzner VM that runs the Sparkplug B broker. What the open stack delivers, what it does not, and the honest read on the $1,200-per-asset-per-year quotes.
Issue 04 put OPC UA and Sparkplug B on the carrier and pointed both at a HiveMQ broker on a $5.50/mo Hetzner VM. Issue 05 puts the dashboards, the historian, and the alerting on top of it. Grafana plus InfluxDB plus Telegraf, all self-hosted on the same VM, fed by the Sparkplug subscriber. The result is a working machine-health dashboard with anomaly alerts, vibration trend, and 90-day retention for under six dollars a month. The comparison: a representative vendor 'machine health' SaaS quote at $1,200 per asset per year. What the open stack delivers that the SaaS does, what it does not, and which of the two should sit on a real plant floor.
Grafana·Influxdb·Telegraf·Self Hosted·Observability·Machine Health - Field NotesMay 18, 2026
OPC UA, Sparkplug B, and the Unified Namespace question
The network layer for the i.MX 8M Plus bench — open62541 server, Sparkplug B broker, and whether Unified Namespace is real architecture or a brand sticker on conventional pub/sub.
Issue 03 stood up the i.MX 8M Plus bench. Issue 04 puts the network layer on it. open62541 OPC UA server vs an Eclipse Tahu / HiveMQ Sparkplug B broker — same data, two stacks, side-by-side measurements. Then the harder question: is Unified Namespace a real architectural shift or a marketing label on top of MQTT pub/sub anyone could have built in 2014. The numbers say one of those is more true than the other.
Opc Ua·Open62541·Mqtt·Sparkplug B·Unified Namespace·Uns - Field NotesMay 11, 2026
When the $240 pilot graduates
The mid-range step — a real industrial accelerometer on an NXP i.MX 8M Plus carrier — and the moment in-house ML stops being cheaper than a vendor service.
Issue 02 ran a $240 edge-ML bench on a 1995 spindle. Issue 03 is the next hop: industrial IEPE accelerometers on an NXP i.MX 8M Plus carrier with a hardware NPU. BOM $2,847, inference latency 4 ms, recall 96%. The build is real. The harder question is when it stops being cheaper than a vendor service like Augury or Sight Machine — and the answer is sharper than I expected.
Edge Ml·Anomaly Detection·Imx8m Plus·Iepe Accelerometer·Predictive Maintenance·Augury