IT/OT FIELD NOTES
BERGEN 60.39°N 5.32°E
What happens when your code touches the real world?
Marius Gjerd · electrician → developer → IT/OT · Bergen. I build IoT in the energy sector and write about industrial sensor data you can, and can't, trust.
Start here
DOC 01 · READ FIRST
Can you trust your sensor data? A developer's guide to the full stack
Every data pipeline starts with a sensor. Here's what happens to the data between the physical world and your application, and where it quietly starts lying to you.
Read the post → DOC 02 · READ FIRSTWhat 4-20mA actually means (and why your zero is at 4)
The current loop is 70 years old and still carries most industrial sensor data. What the signal actually is, how it becomes a number, and where it lies.
Read the post →What I write about
01
Data lifecycle
Can you trust this data? From sensor to cloud, and where it lies.
02
OT security
Industrial threats explained for developers.
03
Lab & school
Honest experiments, open source, what I learn.
04
Bridge builder
What IT and OT get wrong about each other.