In the fields of Internet of Things,intelligent hardware and industrial wireless control,Bluetooth serial port transparent transmission technology has become a common scheme for wireless upgrade of equipment because of its simplicity,stability and low power consumption.As a Bluetooth chip specially designed for wireless connection of serial devices,CH9141 performs well in broadcast,host and slave modes,supports BLE 4.2 protocol,and is especially suitable for scenes that need rapid Bluetooth transmission without complicated development.
Overview of low power Bluetooth serial port transparent chip CH9141
The Bluetooth serial port transparent transmission chip CH9141 integrates a complete Bluetooth protocol stack and serial port transparent transmission logic,the maximum serial port baud rate can reach 1Mbps,and it supports common MODEM contact signals.In addition to basic data transmission,Bluetooth serial port transmission chip also provides GPIO control,ADC acquisition and other functions,which is suitable for wireless transmission of sensor data,remote device control,Bluetooth debugging tools,smart home modules and other diversified applications.With its built-in AT instruction set,users can directly configure the Bluetooth name,broadcast parameters,connection interval,etc.through the serial port,and also support visual settings through the mobile APP,which greatly reduces the development threshold.In slave mode,Bluetooth chips can be connected and communicated quickly by Bluetooth hosts of mainstream systems such as mobile phones,tablets and computers.
For the convenience of computer,the Bluetooth serial port transparent chip CH9141 provides virtual serial port driver.After installation,the system will map the Bluetooth connection to the traditional COM port,and the original serial debugging assistant,data acquisition software and industrial control host computer can be used directly without secondary development for the Bluetooth protocol.This feature is especially suitable for the rapid wireless transformation of traditional serial port equipment(such as PLC,instrumentation,single chip microcomputer system),and realizes"plug-free,long-distance"communication.
Characteristics of application scheme of low power Bluetooth serial port transparent transmission chip CH9141
- Multi-mode support:broadcast,master and slave modes can be switched flexibly to adapt to different scene topologies.
- Efficient transparent transmission:the maximum baud rate of asynchronous serial port is 1Mbps,supporting 5~8 data bits and multiple verification methods.
- Low power design:the power-off sleep current is only 0.3μA,the transmission power is adjustable in 8 steps,and the communication distance can reach 100 meters.
- Hardware expansion:support universal GPIO and synchronous GPIO,which is convenient for Bluetooth remote control;Integrated 12-bit ADC can collect sensor signals.
- Wide voltage and package:the working voltage is compatible with 3.3V and 2.5V,and QFN28 and ESSOP10 packages are provided to adapt to different spatial layouts.
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