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Free public beta until December 4, 2026: every course is open, no card needed. After that, the first chapter of each course stays free and full access is a one-time $39 ($19 for up to 100 founding members chosen for helpful feedback). Your progress is kept. How the beta works

iot

Choosing JSON, CBOR or Protobuf and versioning a message contract so old and new devices coexist

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Taught in

Requires

Required by

Local knowledge map

Local knowledge map

Building a data-flow diagram with trust boundaries and listin… Planning a connected capstone with requirements, a… Serving telemetry and provisioning endpoints from ASP.NET Core Stating what each part of a system does when any one of its links… Drawing a system's architecture and writing down the… Migrating stored settings and message formats across… Validating API input against a schema, returning useful… Choosing JSON, CBOR or Protobuf and versioning a message… Building a small Python service that consumes MQTT into… Comparing local-only, self-hosted, managed-cloud and… Explaining packets, headers and encapsulation through… Modelling telemetry as timestamped points with tags and fields,… Reading a partition table with two app slots and otadata, an… Reading and building BLE advertising payloads and choosing… Building and parsing JSON on a microcontroller with… Telling bytes from text, reading a hex dump, and reading and… Calling a REST API from an ESP32 with JSON bodies, and… Reading bits, bytes, and hexadecimal as register values

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Solid arrows are required prerequisites; dashed are recommended or helpful. Lower rows are more foundational. Click any box to jump to that concept.