[Training Camp_Advanced Class] Socket based on Alibaba Cloud Intelligence-699720A-Jia Jinpeng

It was my first time to learn the Internet of Things. I followed Song Gong’s homework. I wasn’t sure whether I could succeed, so I just treated it as an attempt to learn. I found it very difficult. Although I am not as good as other big guys in the group, I will try my best, hoping that there will be fewer circuit problems, the program will be easier to write, and some of the principles will be understood while others still need to be understood. . .

1. Original intention of learning

I had never been exposed to the Internet of Things before, I had only heard about it, and I didn’t know if it was ok, so I worked hard to see what I could do, at least to graduate.

2. Project requirements

It feels so high-end and full of technology style.

3. Circuit device selection and principles

I took a screenshot of Teacher Ling Yao's Yuque document on the circuit principle, but now that I have my own understanding of actual engineering, there are still a lot of things to consider in actual commercial production and my own works. I have learned a lot, really!

<1>, hardware planning

1. Lichuang EDA, a series that smells good when you use it.

2,

3.

When I saw the chip on 8.14, I was dumbfounded. It was so small, and I was afraid I might break it. . .

4.

Me too. . . Oh, it’s a test of my welding skills. No, I don’t have much skills. I should be building up my skills. Alas, it’s a difficult batch. . .

This is my first time using it, and I want to leave my impressions here. . . To be improved. . .

This is one of the key points. The teacher told us that there is more than one way to drive a relay, but using the driver chip in this way will reduce the stability and cost, and it is a way of business thinking. .

For me, advanced level is almost a blind area of ​​knowledge. I can explore it with the help of the boss, and I am good at mixing points and fishing. .

<2>, circuit principle

My skills are not up to par, so I am learning to copy, so I don’t mess around. Just in case, I just follow the teacher’s drawing. .

I have used finished USB to TTL conversion before, but now I understand it. It is interesting and you can learn it and try it yourself later. . .

This selection is also very careful. In the past, I used to choose filter capacitors that were inherited from the laboratory. I found that using them is wasteful. Generally, the capacitor withstand voltage value is 2/3 greater than the capacitance value. Now the ones used now actually only need to follow the general circuit of the device. Can be built. .

This block is a pull-up resistor to ensure normal use of the module. The low level passes through the inverter and the high level causes the NMOS to start the driver module. Show, and Teacher Lingyao taught us how to pay attention to the level stability and compatibility of digital circuits.

When using STC, pay attention to the default high level when powering on. Everything else is very good. Come on. I hope I don’t get embarrassed by failed welding. .

4. Software and hardware debugging process

1. Welding test

8.14 PCB circuit board

8.15 Is welding basically completed? /

I. . . Too bad . . . First of all, I don't know how to solder mini USB. I found that there was a problem with my settings, the position was not handled well, and the soldering failed CH340E. The worst thing was that I only sold the STC main control chip. . . . But it seems to be strong and still usable. I am still considering whether to weld Alibaba Cloud EMW3080. I am on the road of welding. The road is long and long. I guess I am the number one failure. I am graduating from the advanced class. Will there be an i? I myself also broke the LDO inexplicably, I. . Today I didn't feel happy at all. I even stupidly soldered the socket. ,,,,,I. . . . . Today is terrible. . . . . You probably know it after seeing my picture. . And if you still have problems with your temperature sensor, it's best to find out that you copied the assignment incorrectly. . . Organized into a heating machine. . . . Let's try again tomorrow. . I'm uncomfortable. . .

2. Software learning and debugging

But at the same time, thanks to Teacher Lingyao and my classmates for solving the problem, I learned to import STC Pack, really fast!

Learn to create standard projects yourself

There will be such a warning when entering for the first time. The solution can be completed with the help of friends.

Modify the memory model selection as shown above, and then modify the warning level as shown below.

Finally, Ook is as follows:

I hope there is a rescue, hey//

Referring to this brother's Alibaba Cloud network configuration tutorial, I can't write this! Thank you very much for his help!

Finally, I completed the task with the help of my friends. I am very happy. Thank you guys!

Upload the attachments used,,,,,,

The summer vacation was a meaningful one. I learned about the commercial development process and routines, learned how to solder dense ICs, saw the wonders of the Internet of Things, and experienced the joy of completing it myself!

It doesn’t matter whether you win or not, because I learned new things, broadened my horizons, and exercised myself. It can be said to be a good summer practice activity!

Thanks to LCEDA for its support, teachers’ teaching and customer service help, and classmates’ tips. .

At this point, my project is over! It’s also full of memories!

appendix:

1. Serial port debugging;

2. STC official download software:

3. Newbies who make self-filmed videos - Demonstration.