bluetooth technology, as a wireless communication standard, is widely used in modern devices. The following is a series of questions and answers about Bluetooth modules to help readers better understand the characteristics and Applications of Bluetooth technology.

LoRa technology is a low-power, long-distance wireless transmission technology based on spread spectrum technology. The emergence of LoRa technology solves the requirements of long-distance and low-power consumption in IoT technology. LoRa is actually one of many LPWAN communication technologies, which was first adopted and promoted by Semtech in the United States. This solution provides users with a simple means of long-distance, low-power wireless communication. At present, LoRa devices mainly operate in the ISM frequency band, mainly including 433, 868, 915 MHz, etc.

Both Air Data Rate and Baud Rate are terms used to measure the data transmission rate in communication systems, but their meanings and Applications are different.

RS485 is a serial communication standard that defines a way to communicate data between multiple points. This standard belongs to the EIA/TIA-485 standard and is jointly issued by the Electronic Industries Alliance (EIA) and the Telecommunications Industry Association (TIA). RS485 is commonly used in industrial control systems, automation equipment, instrumentation, building automation, and other Applications that require long-distance, multi-point connections, and high immunity to interference.

　The CC1310 is an important component of TI's family of sub-1GHz devices in high-efficiency/ultra-low-power wireless MCUs. Very low active RF and MCU currents and low power mode current consumption ensure battery life and allow for the use of small coin cells in energy harvesting Applications.

Ebyte E90-DTU is a long-range wireless communication module, usually used for data transmission in industrial automation and Internet of Things Applications.

Node-RED is a powerful tool for building Internet of Things (IoT) Applications that focuses on simplifying the "connection" of blocks of code to perform tasks. It uses a visual programming approach that allows developers to connect predefined blocks of code (called "Nodes") to perform tasks. Connected nodes, usually a combination of input nodes, processing nodes, and output nodes, form a "flow" when connected together.

Narrowband IoT (NB-IoT), also known as LTE Cat NB1, is a low-power, wide-area technology that can run virtually anywhere. It can connect devices to established mobile networks more simply and efficiently, and handle small amounts of occasional two-way data safely and reliably. Its biggest advantage is that it has the following features:

TCP/IP protocol is currently the most commonly used protocol in computer communication networks, and it has also been integrated into all aspects of life, whether it is the http/https protocol used to browse the web, the MQTT/MQTTS protocol used by Internet of Things devices, and the ftp protocol used to download files. , Modbus TCP protocol used in industrial Ethernet and many other Application layer protocols are based on TCP/IP protocol.

With the booming development of Internet of Things (IoT) technology, there is an increasing demand for wireless communication technology that can support a large number of devices, transmit over long distances, and consume low power. Wi-Fi HaLow (based on the IEEE 802.11ah standard) was born to meet these needs. This article will delve into the technical details, advantages and Application prospects of Wi-Fi HaLow in the IoT field.

The development of CoAP began with the recognition of the unsuitability of the HTTP protocol on resource-constrained devices. The HTTP protocol is the most commonly used Application layer protocol on the Internet, but there are challenges in its use on IoT devices

UART is a commonly used serial communication protocol that is widely used in communication between microcontrollers or various embedded devices.

E52-400/900NW22S adopts the new LoRa MESH networking technology, which has the functions of decentralization, self-routing, network self-healing, multi-level routing, etc. It is suitable for smart home and industrial sensors, wireless alarm security systems, building automation solutions, Smart agriculture and other Application scenarios.

The CC2541 is a SOC chip solution from TI designed for BLE and dedicated 2.4GHz Applications. The CC2541 integrates a high-performance RF transceiver with industry-standard 8051, in-system programming flash memory and 8KRAM, supporting 250kbps, 500 kbps, 1Mbps and 2 Mbps data rates, RF output power up to 0dBm, and excellent receive sensitivity (e.g., Sensitivity up to -94dBm at 1 Mbps). The CC2541 also has many powerful supporting functions and peripherals.

IoT smart gateways play a key role in IoT systems. They connect IoT devices and cloud platforms and are responsible for data collection, processing and transmission. For different communication protocols and technologies, there can be specialized gateways, such as LoRa gateways, Zigbee gateways and Bluetooth gateways, each of which has some characteristics and Application scenarios.