Product Parameters​​


​​Compatibility​​: Fully compatible with ESP32 DEVKIT V1/V4, NodeMCU-32S, and all 38-pin ESP32 modules.


​​Input Voltage​​: 4.5V-36V DC (wide voltage support, onboard MP2307DN buck converter, 5V/3A output).


​​GPIO Interfaces​​: 38 channels (supports UART, SPI, I²C, PWM, ADC multiplexing).


​​Power Output​​:


5V/3A (independent regulated output for high-power devices).


3.3V/800mA (LDO regulator for sensors).


​​Protection​​:


Self-recovery fuse (500mA limit per GPIO).


ESD protection: ±15kV (critical signal lines).


​​Communication​​:


USB-to-Serial: CP2102 (default) or CH340 (optional).


Baud rate: 1200bps–2Mbps.



​​Operating Temperature​​: -20°C to +85°C.

​​Key Pin Functions​​


​​VIN​​: DC input positive (4.5V–36V).


​​5V OUT​​: 5V regulated output (max 3A) for servos/displays.


​​3.3V OUT​​: 3.3V output (max 800mA) for sensors.


​​GPIO0–27​​: Digital I/O (GPIO2/4/12–19/21–23/25–27 support ADC).


​​GPIO32–39​​: Dedicated ADC inputs (not for digital output).


​​RXD0/TXD0​​: UART0 for burning/debugging.


​​SDA/SCL​​: I²C0 interface (built-in 4.7kΩ pull-up).


​​BOOT​​: Short to GND to enter download mode.

​​FAQ​​

1.
​​Q: 5V output voltage drops or overheats?​​

A: Ensure input voltage ≥5.5V and total load ≤3A. Overload triggers auto-recovery protection (resets in 30s).

2.
​​Q: GPIO fails to output high?​​

A: Self-recovery fuse triggered (500mA limit). Disconnect load and wait 30s. Avoid short circuits.

3.
​​Q: ADC readings jump excessively?​​

A: Enable ESP32’s internal reference voltage and add a 10nF ceramic capacitor between ADC pin and GND.

【38-Pin GPIO Expansion for ESP32 Development】 38-pin full-function expansion; 3.3V/800mA and 5V/3A power outputs; I²C, SPI, UART interfaces; Suitable for sensor integration and motor control projects
【Wide Voltage Input with Stable Power Output】 4.5V to 36V DC input; MP2307DN step-down chip ensures 5V/3A stable output; suitable for high-current applications like servo motors and displays
【Built-in Protection for Reliable Performance】 Self-recovery fuses on all GPIOs; ±15kV ESD protection on critical lines; prevents short circuits and component damage during testing
【Easy Debugging with USB-to-Serial Chip】 CP2102 or CH340 USB-to-serial support; 1200bps to 2Mbps baud rate range; one-click programming and serial communication for ESP32
【Comprehensive Technical Support Included】 Detailed pinout guide and wiring examples; calibration stability ensured by internal reference voltage; clear documentation for for Arduino and for Raspberry Pi users