ESPAsync Web Server to Control Multiple Sensor Reading: A Review

Abstract

SDN (Software-Defined Networking) is a new networking architecture that is enterprising, feasible, cost-effective and robust applications. This approach decouples network management and forwarding operations, allowing network control to be directly programmable while the underlying infrastructure is veiled for applications and network services. MQTT is a lightweight publish-subscribe network protocol for sending and receiving messages. It is made for communications with remote places when there are resource limits or network capacity limitations. The ESP8266EX-based NodeMCU development board is a small module that has a microcontroller, integrated Wi-Fi receiver, and transmitter. The findings of the performance evaluation show that IoT devices' computational overhead and energy consumption are decreased, as well as the total time of the handshake.