ESP32 DevKitC (WROOM-32)

No specs listed.

The ESP32-WROOM-32 runs at 3.3 V logic and its GPIOs are NOT 5 V-tolerant. Power the board from 5 V over USB or the 5V/VIN pin; an onboard regulator supplies the 3.3 V rail.

• Wi-Fi / Bluetooth IoT sensors and gateways
• Home-automation and MQTT nodes
• Battery-powered dataloggers using deep sleep
• BLE beacons and remote controls

• GPIO34-39 are input-only and have no internal pull-ups or output drivers.
• Several strapping pins (GPIO0, 2, 12, 15) affect boot — avoid pulling them at reset.
• Drive 5 V sensors/LEDs through a level shifter; feeding 5 V into a GPIO can damage the chip.

• BME280 Humidity/Pressure/TempBME280 · Bosch
• SSD1306 OLED DriverSSD1306 · Solomon Systech
• MPU-6050 6-axis IMUMPU-6050 · InvenSense
• DS18B20 1-Wire TempDS18B20 · Analog Devices
• WS2812B Addressable LEDWS2812B · Worldsemi

Community starter examples — minimal, unofficial, and provided to get you wiring fast. Verify against the manufacturer datasheet before relying on them.

// ESP32 DevKitC - blink + analog read starter
#define LED 2          // onboard LED on most DevKitC boards (GPIO2)

void setup() {
  Serial.begin(115200);
  pinMode(LED, OUTPUT);
}

void loop() {
  digitalWrite(LED, HIGH);
  delay(500);
  digitalWrite(LED, LOW);
  delay(500);
  Serial.print("GPIO34="); Serial.println(analogRead(34));   // 0..4095
}

# ESP32 DevKitC - blink + ADC starter (MicroPython)
from machine import Pin, ADC
import time

led = Pin(2, Pin.OUT)          # onboard LED
adc = ADC(Pin(34))             # GPIO34 (input-only ADC pin)
adc.atten(ADC.ATTN_11DB)       # full ~0-3.3 V range

while True:
    led.value(1); time.sleep(0.5)
    led.value(0); time.sleep(0.5)
    print(adc.read())          # 0..4095