The four stages of IoT communication are the perception layer, transport layer, network layer, and application layer. In each stage, different wireless technologies can be used to transfer information.

Short-range wireless communication technologies include Wi-Fi, ZigBee, Bluetooth, and Z-Wave that we are familiar with. Today we will unveil the mystery of Wi-Fi.

TCP/IP (Transmission Control Protocol/Internet Protocol, Transmission Control Protocol/Internet Protocol) refers to a protocol cluster that can realize information transmission between multiple different networks.

MQTT (Message Queuing Telemetry Transport) is a lightweight message protocol based on the publish/subscribe method under the ISO standard, which is usually used in communication between devices and applications such as the Internet of Things and smart homes.

EMC is interpreted as electromagnetic compatibility. For PCB power supply design, the design of EMC is very important.

WebSocket is a network protocol for full-duplex communication over a single TCP connection. It uses an HTTP-like handshake to establish a connection, and then uses a separate persistent connection to communicate.

The RS485-to-LoRaWAN data collector is a data collector whose uplink wireless interface adopts the standard LoRaWAN protocol and the downlink interface adopts the RS485 interface. It can transparently transmit the ModBus protocol to the server through the LoRaWAN wireless network to realize the wireless transmission of industrial field control signals. .

Socket is an intermediate software abstraction layer for communication between the application layer and the TCP/IP protocol cluster, and it is a set of interfaces.

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