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The WeMos Lolin32 OLED is a development board with ESP32 and built-in 0.96 inch 128×64 I2C OLED display.
ESP32 (WROOM32) is already integrated antenna and RF balun, power amplifier, low-noise amplifiers, filters, and power management module. The entire solution takes up the least amount of printed circuit board area.
This board is used with 2.4 GHz dual-mode Wi-Fi and Bluetooth chips by TSMC 40nm low power technology,
power and RF properties best, which is safe, reliable, and scalable to a variety of applications.