ESP32S3 Development Board Design Pitfall Guide

Statement: For design reference only by electronic DIY enthusiasts, commercial use is prohibited!
During the design process, if you have any questions or feel that there is something unreasonable about this project, please leave a message for communication~
--------------------------- ------------------------------------Dividing line------------ ---------------------------------------
Verified
features of the physical picture of Ver1.1 version:
1 .Can realize the automatic download of the program
2.Can realize the serial port printout and carry out serial port debugging (making up for the shortcomings of the Ver1.0 version)
3.The resistors and capacitors are all packaged in 0805, which is easy to weld (0603 welding hurts the eyes^_^)
4 .Only a few components are needed to realize the design of the ESP32S3 development board, which is compact and compact~
5. The ESP32S3 module uses ESP32-S3-WROOM-1 (D2N8R8), which is compatible with other models of ESP32S3 modules. The overall price is 26 yuan. Recommended
proofing and production version Ver1.1
------------------------------------------------ ---------------------Dividing line--------------------------- --------------------------
2022/12/1 Supplement:
How to view the pin definitions of ESP32 and ESP32S3: You can find the pin definitions in this path on your computer. The pin definition header file
of ESP32 and ESP32S has been uploaded as an attachment. Friends who need it can download it by themselves~
ESP32 C:Usersusername**.platformiopackagesframework-arduinoespressif32variantsesp32
ESP32S3 C:Users*****.platformiopackagesframework-arduinoespressif32variantsesp32s3
ESP8266 C:Users****.platformiopackagesframework-arduinoespressif8266variants
odemcu
---------------------------------------- --------------------------Dividing line---------------------- -----------------------------
V1.1 version update time: 2022/11/13
Review Ver1.0 features:
No need for CH340C After testing, it was found that there is no way to perform
serial port printing. After connecting to CH340, serial port printing can be performed normally. Therefore, the Ver1.1 version was updated.
When WIFI is always on, the temperature is relatively high, so the chip is added A heat sink was installed
to replace the Type-C interface and adopt a Micro USB interface, making welding more convenient!
Purchasing reference:
All-copper MicroUSB socket MK5P Mike 5P MINIUSB Micro USB female socket 5-pin patch - Taobao (taobao.com)
Aluminum heat sink Router CPU electronic component chip heat dissipation adhesive MOS memory video memory motherboard radiator - Taobao (taobao.com) com)
Physical picture: In production, to be updated ~
Recommended board version Ver1.1, compact in size and easy to weld ~
--------------------------- --------------------------------------Dividing line---------- -------------------------------------
Ver1.0 Version
1.ESP32S3 master control Chip purchase reference:
ESP32-S3-WROOM-1 D2N8R2/R8 dual-core WiFi & Bluetooth MCU module IoT wireless module - Taobao (taobao.com)
2.ESP32-S3 Espressif official website description:
ESP32-S3 Wi-Fi & Bluetooth 5 (LE) MCU | Espressif Technology (espressif.com.cn)
3. Pitfall record:
       After the board is soldered, follow the data manual operation, the COM port cannot come out, and the program cannot be burned normally. At first, I suspected that it was the board I was planning to redesign the circuit board, but after careful investigation, no problem was found, so I used the previously designed ESP series universal downloader to download a program and try it out. Unexpectedly, the program was burned in! ! ! It’s really amazing! ! !
Then, unplug the writer and power on again, and everything is normal! The port can be detected, and automatic downloading of programs can also be achieved without using an automatic download circuit.
Summary: To burn a program for the first time, you need to press and hold BOOT and then press EN (it is written in the data sheet, but it was unsuccessful). After that, whether it is automatically downloading the program or using the serial port for communication and printing, it can be used normally.
4. ESP series universal downloader:
ESP series universal downloader - Jialichuang EDA open source hardware platform (oshwhub.com)
5. Physical picture:
6. Note:
When performing PCB wiring, the pins of the ESP32S3 chip have been Delete and modify (some pins cannot be used normally. After soldering, it will be more troublesome to disassemble later).
Remove the resistor on TX and add it to other circuit diagrams when it is used later (after testing, this resistor does not work. It’s okay to add them, it won’t affect normal use)
The ESD chips are too small and difficult to solder, so I removed a few, so there are inconsistencies between the components on the PCB and the schematic diagram!
7. Other supplementary miscellaneous items:
ESD: Electrostatic Discharge (ESD: Electrostatic Discharge) should be the main culprit causing excessive electrical stress (EOS: Electrical Over Stress) damage to all electronic components or integrated circuit systems. Because static electricity usually has a very high instantaneous voltage (> several thousand volts), this damage is devastating and permanent, causing the circuit to burn directly. Therefore, preventing electrostatic damage is the number one problem in all IC design and manufacturing.