#The Fifth Lichuang Electronic Design Competition#Wi-Fi business card

Note: * is required.

[Please fill in during the registration stage↓]   1. Self/Team Introduction I am from Wuhu, Anhui, and have been engaged in mobile software development for many years. This year, I fell into the trap of hardware, and I have been unable to extricate myself and become addicted to it.   2. Briefly introduce the project. When the mobile phone or computer is connected to the Wi-Fi of the business card, the personal website homepage will automatically open.

[Please fill in during the competition stage↓]   1. Describe the project details. Earlier this year, I saw the Linux business card of a foreign master and thought it was cool, so I also wanted to make my own business card. When giving gifts during the Chinese New Year or discussing business, giving a business card like this is a great way to gain face. Making this project required all my skills. PCB design, impedance matching, embedded programming, web programming, 3D modeling, prototype drawings and UI design were all completed by myself. The website can be updated through the browser. After the business card is connected to the Internet, the firmware and website can be upgraded. The USB interface is plug-and-play. The onboard LED light can be operated and the channel can be switched. The material cost is about 10 yuan.   2. Describe the challenges faced by the project and the problems it solves. The most difficult part of this project is impedance matching. Impedance mismatch will cause the speed of opening web pages to slow down, which is intolerable for a person with a craftsman spirit. I used various methods, including modifying the board, replacing components, learning RF principles, using simulation software, and using a network analyzer. Finally, a double-layer board was used to achieve a level close to that of a four-layer board plus a shielded development board. Secondly, we went through many detours in storing and reading websites, and finally adopted a compromise method, that is, the program and the website are both in one Flash. This reduces software investment and puts time and energy on the most important speed improvement. , secondly, it reduces the material cost. The disadvantage is that it can only store up to 15MB of data.   3. Describe the key points involved in the hardware and software parts of the project Hardware: double-layer board 2.4GHz antenna impedance matching, low cost, USB plug-and-play. Software: Browser updates website, business card can upgrade firmware and update website, switch channels, and control LED lights after being connected to the Internet.   4. Project material list shows RF MCU: ESP8266EX 1 SPIFLASH: W25Q128JVSIQTR 1 Crystal oscillator: TXC 7V26000012 1 LDO: ME6211A33M3G-N 1 Diode: PESD3V3L1BA,115 1 LED: Red light 0402 2 Capacitor: 1uF 0201 2 Capacitor: 12pF 0201 2 Capacitor: 10uF 0402 1 Capacitor: 104, 22pF, 2.4pF, 2.0pF 0201 1 Inductor: 4.3nH, 2.9nH 0201 1 Resistor: 12kΩ 1% 0201 3 Resistor: 130Ω 0402 1 USB buckle plastic part 1   5. Upload project pictures 5.1. Print the contest logo picture on the PCB, otherwise you will be deemed to have given up the competition           5.2. Other pictures of the project    6. Demonstrate your project and record it as a video for upload 6.1. Video upload to the official website of the competition 6.2. Video title and link at Station B                      The 5th Lichuang Electronic Design Competition: "Wi-Fi Business Card" Project - Personal Introduction                     The 5th Easy Electronic Design Competition: "Wi-Fi Business Card" Project - Project Introduction                     The 5th Easy Electronic Design Competition: "Wi-Fi Business Card" Project - Function Demonstration &Performance Test                     The 5th Lichuang Electronic Design Competition: "Wi-Fi Business Card" Project-more < br> < span class="colour" style="color:rgb(170, 170, 170)">< span class ="size" style="font-size:12px">Notes: ①: Video requirements: Please shoot horizontally, the resolution is no less than 1280×720, the format is Mp4/Mov, and the size of a single video is limited to 100M; ②: Video upload: Please upload to the official website of the competition and Station B ( www.bilibili.com ) simultaneously. The top 10 most popular projects at Station B will receive a cash reward of 1,000-5,000 yuan, and other uploaded projects will receive a 100-yuan Lichuang Mall no-threshold coupon; ③: Video Title: The 5th Lichuang Electronic Design Competition: {Project Name}-{Video Module Name}; For example, the 5th Lichuang Electronic Design Competition: "Autonomous Driving" Project - Team Introduction. < /span>< /span>< br> < br> 7. Is it publicly released for the first time? 7.1. Whether the project has been published or won an award before, please indicate whether the link   has been published on the Lichuang open source hardware platform . 7.2. If the project is optimized based on the original project, please explain the optimization part. The impedance matching is optimized based on the original project and the transmission speed is improved.   8. Open source document            code cloud , Github * 9. References: Refer to the appearance of George Hilliard's business card 0a-esp8266ex_datasheet_cn.pdf (ESP8266EX technical specifications) esp8266_hardware_design_guidelines_cn.pdf (ESP8266 Hardware Design Guidelines)

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