Zonghua Ouyang

Philadelphia, Pennsylvania | zo44@seas.upenn.edu | 480-875-9018

What is This Project About?

This is a hardware design that can display the real-time currency between CNY or CNH and USD on a segment display.

3D Model

Figure: 3D Model

PCB Design

Figure: PCB Design

Why I Build This Project?

At the time I built this project, the currency between the Chinese Yuan and the U.S. Dollar fluctuated dramatically. I think a display on my desk that displays the real-time currency can help me decide when to buy some dollars.

What Problems Did I Resolve in the Project?

HTTPs Request

The API I chose to retrieve the currency information can only be requested using HTTPS. While handling HTTPS request is as simple as HTTP request on Linux and Windows. Using a microcontroller to post an HTTPS request is not an easy task. Fortunately, ESP32 provides some libraries to handle HTTPS requests, but I also need to configure the certifications.

How I Improved from This Project?