Wireless communication module is the key link in the IoT concept to connect the IoT sensing layer and network layer. Among these modules, the role of cellular communication module is to carry the data interaction from end to cloud platform through WAN, which is the channel for user data transmission and one of the core components of IoT terminal.
The data communication between the end and the platform is realized through the module, which mainly has AT command mode and data transmission mode.
1.AT command mode.
AT command mode means that the host sends AT command to the module through the serial port to iot wifi module send the terminal data ("10") to the module group, and then sends it to the module through the module. If the AT command is sent successfully, an answer (SNEDOK) will be given. After the module is sent, the module responds to the main controller through the serial port to send completion; the platform sends data ("01") to the module, and the module sends it to the main controller through the serial port to realize the operation of the opposite end. Successful sending of AT command will be responded.
2. Data transmission mode.
That is, the master controller sends data ("10") to the module through the serial port, and then sends it to the platform through the module. After the transmission is completed, the platform sends data to the module, and the module sends it to the main controller through the serial port to realize the operation of the opposite end.
There is no need to send special commands to transfer data. It is natural to send the corresponding AT commands to the module through the master controller to configure, for example, the platform address, turn on the transmission mode, etc. It is important to note that it is best to add information such as data length and checksum in the transmissive mode to prevent problems such as packet loss and to exit the transmissive mode for troubleshooting when the device communicates abnormally.
As the name implies, the transparent transmission module is the transparent transmission module. Transparent transmission means that regardless of the business transmitted, it is only responsible for transmitting the business that needs to be transmitted to the target node, which is equivalent to a data line or serial line, encapsulating the data through the module TCP/IP protocol stack, and then uploading the data to the cloud platform through the network, without processing the transmitted business.
The connection of things in the Internet of Things era, to achieve data transmission of intelligent devices need to rely on the power of wireless transmission module to achieve the exact same length and content of the sender and receiver data, without any processing of data, only transparent data transmission, can be widely used in energy and electricity, automatic meter reading, smart city, industrial automation, vehicle traffic, environmental monitoring, equipment monitoring, modern agriculture, etc. many industries.
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Why is a Wi-Fi module necessary?
Data transmission and reception over Wi-Fi are handled by wifi modules or wifi microcontrollers. They can also respond to commands transmitted via Wi-Fi. Wi-Fi modules are utilized for inter-device communication. They are most frequently applied to the internet of things.
How can I configure the ESP8266 Wi-Fi module?
How to set up the ESP8266
Attach the ESP8266 to the USB-UART adapter as shown: RX -> TX, TX -> RX, GND -> GND, and VCC -> VCC.
To GND, pull the GPIO0 pin.
The computer and adapter must be connected.
Launch a UART flashing application, such as ESPEasy.
Choose the suitable COM port for your uploading binary file.
What is the IP address of a WiFi module?
Your network has assigned an IP address to each device linked to it. This also applies to your wireless access point, which has been given a unique IP address.
What is ESP32 WiFi channel?
The accessible channels and accompanying operating frequencies for the Wi-Fi frequency band, which ranges from 2412 to 2484 MHz, can be set up using software. Power meters come with default settings, but they can also be programmed. Please refer to the ESP32 Phy Init Bin Parameter Setup Handbook for further information.
The ESP8266 WiFi module has how many pins?
Just 11 of the ESP8266's 17 GPIO pins (0–16) can be used because the remaining 6 pins (GPIO 6–11) are used to connect the flash memory chip. This can be seen as the tiny 8-legged chip next to the ESP8266. One of these pins could cause your software to crash if you attempt to use it.