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Nowadays,it is an era of endless new technologies. With the support of Bluetooth technology in the electronics field, especially traditional electronic products, many traditional electronic products have a second development and transformed into smart products. When all products add Bluetooth module, must process Bluetooth serial port.

Bluetooth technology is a short-distance communication technology, widely used in our life. In addition to the early Bluetooth headset, Bluetooth mouse, Bluetooth keyboard, etc., Bluetooth technology is now commonplace in the IOT. Not only about that, Bluetooth technology is also really common in the field of automotive networking.

The HY-40R204I is a 2.4 GHz Bluetooth 4.2 module from Shengrun Technology, which uses a high-performance TI CC2640R2F chip. It can be powered directly using a standard 3V coin cell battery or a pair of AAA batteries. In the lowest power shutdown mode, it consumes only 0.15uA and wakes up in a few microseconds.

With the rise of the IOT, and development of smart devices, everyone is becoming more aware of wireless communication technologies. Bluetooth and WiFi are well known among many wireless technologies,As a safe, intelligent and fast wireless technology, Bluetooth is naturally more important.

At present, many Bluetooth modules on the market still cannot support users for secondary development. Even if they are supported, users need to learn the relevant knowledge of MCU and Bluetooth protocol, so they must spend a lot of time to get familiar with them, and finally lead to half the effort.

With the rapid development of technology, various smart devices are emerging difference. Smart wearable devices and smart home devices centered on smartphones often use wireless connection technologies such as Bluetooth and WiFi. In particular, Bluetooth provides a stable and low-energy data transmission service for devices.