#9th LCSC Electronics Design Contest# Temperature and Humidity Monitor

* 1. Project Function Introduction:

      The successful replication of this temperature and humidity meter wouldn't have been possible without the strong support of LCSC, which strengthened my confidence to further improve the project. Although the thermometer currently only displays temperature and humidity, I've grown a lot through this project. This is also LCSC's original intention in organizing these kinds of activities!
 
 
* 2. Project Attributes:

This project is being publicly released for the first time, and it was created with reference to LCSC's official materials. It has not won any awards in other competitions, nor has it participated in any school presentations.
 
 
* 3. Open Source License:

GPL 3.0 Open Source License

* 4. Hardware Part:

Let's take a look at the actual product
. Every time I see this circuit board, I think about how difficult soldering is. Just placing the components on one board took half an hour, but I still want to say that teppanyaki is really delicious. Fortunately, there were no problems after completion, and the code was successfully burned in.
 
Since most of the hardware is based on the official schematic, no major modifications were made. Only the AA batteries were replaced with lithium batteries, and a lithium battery charging circuit and a USB switching circuit were added.
The modified parts
 
have been verified, and the modified circuit works normally. Since the lithium battery used only has a capacity of 200mAh, the battery life is about four or five days. Is this the end of the hardware part? Looking at the circuit board in my hand, I felt something was missing. Oh, it turns out, it has the internal beauty of circuitry but lacks the external beauty. So, I
got to work, and that's how the story began. The temperature and humidity meter with the added casing and panel made me fall in love with it, and I couldn't wait to place an order, finally using up the necessary parts.
Why are there two? Because I, being the fool I am, only bought one sensor with a 50 yuan parts coupon. When I realized it, I only had one parts left for sensors. Sigh, I had to cut my losses and buy another sensor, making an extra one to avoid waste. But to save costs, I bought other components through other channels, only to end up with fake chips, which left me scratching my head for another afternoon. That concludes the hardware story.
*5. Software Part

As for the code, I typed it out line by line following video tutorials. I don't create code; I'm just a code porter. The code is attached.
Software video tutorial: https://www.bilibili.com/video/BV1Ay411B7MF?vd_source=fcc6e4ce4c6927d6f1874a6d1f1138d7
The program is burned using the ST_link downloader. You need to configure the downloader beforehand, otherwise errors will occur.
If you are using the source code in the attachment, you don't need to go through this process; just compile it and then download it using the downloader.
*6. BOM List

 
 
* 7. Competition Logo Verification

 
* 8. Demo your project and record a video to upload.