Bought a very good ESP32-S2 development board

littleshrimp

Bought a very good ESP32-S2 development board [Copy link]

 

 

I want to play with ESP32-S2 recently. I bought ESP32-CAM before, but the reserved I/O was too few and inconvenient to use. A few days ago, I saw a model online. The price was very cheap, 18.8 including shipping, and the board had relatively complete reserved I/O.

However, when I saw that there were no sales, I placed an order to try. I didn't see any logistics information and thought it could not be shipped. Unexpectedly, I received the express delivery a few days later. Because I was out of town, I asked someone to open it and saw that it was this development board. Then I contacted customer service to urge "shipping" before confirming receipt.

I got the board today and was ready to test it. I looked at the front and back and found no wiring. I thought it was a design problem and no wiring. They just soldered the module to the perfboard and let us play with flying wires, because it seems that this kind of board does not need to use a 4-layer board. However, the serial number seems to be related to the IO of ESP32-S2.

After plugging in the USB, the WS2812 light comes on, but the wiring connected to the 21 pad disappears. I use a multimeter to test that the 21 pad and the module are connected, which means the wire is on the inner layer. Sure enough, it is a 4-layer board, or 6-layer? 8-layer? Anyway, it is quite luxurious.

ESP32-S2-WROOM is no longer officially recommended by Espressif for new designs, but the performance of this module is indeed very powerful. If you are interested, you can learn more about it. I personally think this is a very good board.

lugl4313820

It is indeed cost-effective. Moderator, please make more open source ones to share!

dcexpert

S3 is better than S2

xiaosong06

Good value for money~

吾妻思萌

Now you can buy a powerful board for 20 yuan, but 20 yuan can't even buy milk tea.

zhb79687

Come on! Do a good job

littleshrimp

dcexpert posted on 2022-8-26 21:15 S3 is better than S2

I was looking at the peripherals on the product page on the official website. The S2 has USB LCD and CAM interfaces. After hearing what you said, I looked at the specification again. It seems that the S3 also has what the S2 has.

freebsder

This is too cheap.

悠游自如

It can draw 4 layers with 2 layers. It's really, I cried to death

suncat

How is the effect of using it? Is there any follow-up for everyone's reference? Come on, OP.

damiaa

dcexpert posted on 2022-8-26 21:15 S3 is better than S2

S2 has Bluetooth disabled.

dcexpert

damiaa posted on 2022-9-1 10:30 S2 has Bluetooth disabled.

When the ESP32C5 supporting 5G band comes out, it will feel even stronger

littleshrimp

damiaa posted on 2022-9-1 10:30 S2 has Bluetooth disabled.

The lack of Bluetooth has little impact

damiaa

suncat posted on 2022-9-1 09:33 How is the effect of using it? Is there any follow-up for everyone's reference? Come on, OP.

I feel the entire esp32 series is good.

Honghuzaitian

I feel that ESP32S3 has more powerful performance and should be more playable.

dcexpert

Found a cheaper ESP32-S2 development board

littleshrimp

dcexpert published on 2022-9-17 10:38 Found a cheaper ESP32-S2 development board

This is also good. Are its FLASH and PSRAM integrated into the chip?

dcexpert

littleshrimp posted on 2022-9-17 10:58 This is also good. Are its FLASH and PSRAM integrated in the chip?

This seems to be based on the foreign LOLIN S2 Mini development board. It has no external expansion chip and uses the Flash that comes with the chip.

Technical specifications

Technical specs

	parameter
Operating Voltage	3.3V
Digital I/O Pins	27
Clock Speed	240MHz
Flash	4M Bytes
PSRAM	2M Bytes
Size	34.3*25.4mm
Weight	2.4g

Website:

https://www.wemos.cc/en/latest/s2/s2_mini.html

Schematic diagram:

https://www.wemos.cc/en/latest/_static/files/sch_s2_mini_v1.0.0.pdf

dcexpert

Pin Diagram

littleshrimp

dcexpert published on 2022-9-17 14:37 Pin diagram

There is no FLASH or PSRAN chip on the front and back of the board.