E49-900M20S is a cost-effective wireless data transmission module launched by Chengdu Ebyte. It is A pure hardware module based on CMT2300A. E49-900M20S Supports the maximum transmission power of 20dBm,users can set a lower output power , thus saving power consumption.The module works in the 850MHz ~ 930MHz frequency band, including the commonly used 868MHz and 915MHz frequency band.Since this module is a pure RF transceiver module, using SPI interface, needs MCU driver.

Many customers have encountered this situation, an antenna product, the nominal operating frequency, gain, bandwidth, standing wave and other electrical indicators are very good. However, after using their own products, the communication quality is very poor, and even can not be used, in some high-power occasions will burn out the product.

　E104-BT05 is a serial-to-BLE Bluetooth slave module based on Bluetooth protocol 4.2, working in the 2.4GHz band. This module supports low-power broadcast, data transparent transmission, control configuration, IO port level reading, IO port level setting, and variable frequency PWM output.

RF wireless module is a kind of module that uses wireless technology for wireless transmission. It is widely used in computer wireless network, wireless communication, wireless control and other fields. The wireless module is mainly composed of transmitter, receiver and controller.

　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.

E104-BT5032A is a serial-to-BLE Bluetooth master-slave integrated module based on Bluetooth protocol version 5.0. It has a small size and low power consumption, and works in the 2.4GHz frequency band. E104-BT5032A module is developed by Chengdu Yibaite Electronic Technology Co., Ltd. based on NORDIC nRF52832 chip.

Embedded systems, as a pearl in the field of modern technology, exist silently in every aspect of our lives. Whether it is home appliances, automobile control systems, medical equipment, or smartphones, embedded systems play an irreplaceable role.

The essence of an embedded system lies in its core technology, and the microcontroller is an indispensable golden component in this technology ecosystem. From smart homes to medical equipment, from automotive electronics to industrial automation, microcontrollers have become the engine driving the advancement of embedded technology with their high integration, miniaturization and programmability.

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.