Microcontroller debugger

As a small appliance developer, I often find myself using low-end microcontrollers due to cost constraints, which makes testing inconvenient.
This hardware acts as an adapter; developers only need a microcontroller supporting a 125µs timer, a free I/O port, 260 bytes of code, and 24 bytes of RAM.
 
The compiler indicates the communication driver code size is shown in the image.
 
Since this project was based on an older board design using Altium Designer, I'm simply copying it to LCSC; prototyping might cost money.
The accompanying host computer software is the work of a former colleague and I cannot share it. Recently, I saw a very powerful curve-setting tool created by a skilled developer.
After testing, this software can correctly decode protocols and record data; I'm now sharing the hardware with everyone. (The schematic diagram is for reference only; the labeling is incorrect. If asked, I simply didn't draw a schematic diagram.)
 
 
The basic working logic is shown in the following diagram (sketch):
The basic working logic is shown in the following diagram (actual product image):
Hardware physical product image :
Touch button board
front assembly view;
Bottom component
casing with thermocouple wire storage;
Main working parameter interface (microcontroller debugging parameters)
; Power acquisition module, data acquisition interface
; Thermocouple uses quick-connect terminals;
Temperature acquisition interface;
Host computer acquisition interface (The software was found on Bilibili by "麟麟儿呀"; if you don't allow me to use it, kick me and I'll delete it).
 
Software download address:
http://jooiee.com/cms/ruanjian/115.html
Software video introduction;
https://www.bilibili.com/video/BV1cC4y1N73Q/?spm_id_from=333.1007.top_right_bar_window_history.content.click&vd_source=4a188a523cc2318696816a1288657f42
 
Saiyuan microcontroller programming tool, LCD screen is programmed via serial port;
https://socmcu.com/cn/tool_show.php?id=18