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constants in PHP
constants in PHP Constants are variables whose values cannot be changed during the script execution. Two ways to define a constant: Using the define () method. Using the const keyword. constant () function Note: - naming a constant, don't use $ symbol with the constant's name. 1. Using define () To create a constant. Syntax: - D…
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Logical design Building Blocks & Architecture
Logical design Building Blocks & Architecture BUILDING BLOCKS of IoT Basic building blocks of the IoT system – Sensors, Processors, Gateways, Applications. Sensors: These are front-end IoT devices( “Things”) of the system. The main purpose is to collect data (sensors) or send it to data(actuators). These have uniquely identifia…
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