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Serial communication interface of DC charging pile microcontroller: bridge of data interaction

The serial communication interface of DC charging pile microcontroller is the key channel for data exchange with the outside world. With its flexibility and efficiency, these interfaces support the communication between charging piles and various external devices, and realize intelligent management and control.

Main component

Concept:

The serial communication interface allows the microcontroller to communicate with external devices through serial transmission. These interfaces include, but are not limited to, UART (Universal Asynchronous Receive/Transfer), RS-232, RS-485, etc., which support serial transmission of data, that is, data bits are sent sequentially, one after another, over a single communication line. In the DC charging pile, the serial communication interface is used to connect the display screen, sensor, card reader, energy meter and other devices to achieve data collection and command delivery.

Function:

1. Man-machine interaction: The HMI touch screen connected by the serial interface enables users to visually view the charging status and set charging parameters to achieve convenient interactive operation.

2. Data acquisition: The energy meter and sensor connected by the serial interface are used to monitor key parameters such as voltage and current during the charging process in real time to ensure charging safety and accurate billing.

3. Device control: The microcontroller sends control commands through the serial interface, such as starting or stopping charging, adjusting charging parameters, etc., to achieve accurate control of the charging pile.

4. Information upload: The charging pile uploads the collected data to the server or cloud platform through the serial communication interface to achieve remote monitoring and management of data.

Working Principle:

1. Data transmission: The microcontroller encapsulates the data into a serial communication format and sends it to external devices through a serial interface. For example, with the UART interface, data is sent at a specific baud rate and data format.

2. Data reception: The data sent by the external device through the serial interface is received by the microcontroller and decoded into a format that the microcontroller can process.

3. Protocol compliance: Serial communication usually follows specific communication protocols, such as Modbus RTU, DL/T 645-2007, etc. These protocols define the structure of data frames and communication rules to ensure the correct transmission and analysis of data.

4. Level conversion: For devices with different level standards, such as RS-232 and RS-485, the microcontroller may need to perform level conversion to match the interface level and ensure communication compatibility.

Sum up

The serial communication interface of the DC charging pile microcontroller is an important part of the intelligent and networked management of the charging pile. They provide the charging pile with the ability to communicate with the outside world, so that the charging pile can serve the charging demand of electric vehicles more intelligently and efficiently.

DC CHARGING PIlE SERIES

DC charging pile is an efficient charging facility for electric vehicles, which uses direct current (DC) to directly charge the vehicle battery, significantly reducing the charging time. Compared with traditional AC charging piles, DC charging piles are able to provide higher power output and can usually charge an EV to 80% of its capacity in 30 minutes, providing users with a convenient charging experience.

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