IOT = sensors + connectivity + people & processessensors: temperature, acoustic/sound/vibaration, flow, chemical/gas, force/load/pressure, leaks, levels, electric, magnetic, machine vision, optical ambient light, position/proximityConnectivity: These inputs are digitized and place into networksPhysical layer: protocolsData linked layer: wifiapp layer: MQTT coApPeople and processes: mobile app, w..

Naming meaningful Variables, constants: nouns/short phrases with adj Functions/ methods ( command): verbs, short phrases with adj classes ( use classes to create things): nouns, short phrases with nouns name casing: snake_case: is_valid, send_response (python) camelCase: isValid, sendResponse ( java, js) PascalCase: AdminRole, UserRepository ( python, js, java) — classes kebab-case: , ( html) —-..