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It operates in three modes: AP, STA, and AP+STA. It integrates 520-kB SRAM, 448-kB ROM, and 16-kB SRAM in RTC. The board employs a USB driver chip: CH340C, which ensures good system compatibility, higher download speeds, and improved stability.

Utilize familiar Arduino functionality with this compact device, which includes 4 10-bit ADC channels, 5 PWM pins, 12 digital I/O pins, and hardware serial Rx and Tx connections.

The LED remains off when no battery is connected. User-Friendly Design – Features a USB-C input port and solder pads for direct wiring, designed for makers and hobbyists.