Free course
Learn Modbus RTU and TCP the way you meet them on site. From the data model to a bus that refuses to answer.
No account, no email address, no paywall. Start at lesson 1 or jump to the part you need.
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For installers, service engineers, system integrators and facility technicians who connect and read Modbus devices. No programming experience required. Some background in electrical work and networking helps.
Every lesson explains the idea in plain language first, then walks through a worked example, and ends with an exercise you can do yourself. The exercises use free tooling, and each one has a variant for readers without hardware at hand.
Part 1
Part 2
Part 3
Part 4
Technical guides, comparisons, and best practices for Modbus monitoring
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