esp32 core board, physical product has been verified

It is improved by referring to Essence's official NodeMCU-32S Lua WiFi IoT development board. When developing, select NodeMCU-32S as the board type to be fully compatible.

The following aspects have been mainly improved: 1. The IO port label has been changed to the front, making wiring more convenient. 2. I couldn’t stand the original microUSB interface (because I couldn’t find the data cable) and changed it to a type-c interface. 3. The original wifi antenna is outside the PCB. It is inconvenient when plugging and unplugging the core board (there is always a fear of breaking the antenna part). Now the PCB is lengthened a little, and the antenna is completely protected inside the board. 4. Increased and optimized line width (I am a patient with obsessive-compulsive disorder). 5. Removed the LED light on the IO2 port. Personally, I feel it is of no use. 6. The width of the two rows of pins is 2.54mm wider than the original board. It is no problem to plug into the breadboard. The original board is too narrow to weld the module.

Note: Compared with the original version, the LED of the IO2 port is removed. Students who need it can add it by themselves. The other functions are exactly the same as the original version. The pins in the schematic diagram are straight-in pin headers. The actual ones soldered are the 2* ones. For 20cm bent pins, only take the larger outer row.

Let’s start with the original Anxinco board: the improved version: the real thing after welding: