LOLIN D32

Board
by LOLIN (WEMOS)lolin-d32≈ cheap (under ~$15)

Also known as: d32

Verify my boardCompareEdit on GitHub
Flash this board — 1 firmware option · Unverified
LOLIN D32 pinout
Pinout

Specifications

Radiosinherited from ESP32

Wi-Fi
Wi-Fi 4 · 2.4 GHz
Bluetooth LE
BLE 4.2
Bluetooth Classic
yes
802.15.4
no

USB

Native USB
no
Bridge chip
ch340

Board

Form factor
devkit
Dimensions
57 × 25.4 mm
Battery connector
yes
Charging
yes
Built onLOLIN D32 BoardESP32 SoC

ESP32-WROOM-32 devkit with a LiPo battery/charging interface (PH-2.0, 500 mA max), CH340 USB-UART bridge, GPIO5 LED.

Firmware for this board

Unverified

  • ESP32 MarauderUnverifiedpentest
    Flash ESP32 Marauderguided

    Unverified esp-atlas asserts this board↔firmware link at the shown trust tier — it does not guarantee your specific unit or the current firmware version. Flashing can erase keys/config and can brick the device. At your own risk.

Notes

  • Espressif ESP32-WROOM-32 module, REV1; 4 MB flash
  • Built-in LED on GPIO5
  • Lithium battery interface, PH-2.0 2-pin connector, 500 mA max charging current, supports 3.7 V LiPo
  • Physical USB connector shape not stated on the official page (omitted)
  • Weight: 6.1 g
  • Plain ESP32-WROOM-32 module (single ordering code, no R-suffix) never had a PSRAM variant
  • io.gpio_exposed=22 QUOTED: vendor page Technical specs table states "Digital I/O Pins | 22". The 500 mA figure on this page is LiPo charging current, not a GPIO/rail output rating, so power_out is omitted
  • io.gpio_free=17 DERIVED: the vendor's own labeled pinout diagram (mischianti.org reproduction of the wemos.cc silkscreen) enumerates 25 header GPIO pads (VP/36, VN/39, 34, 32, 33, 25, 26, 27, 14, 12, 13, 23, 22, GPIO1/TXD0, GPIO3/RXD0, 21, 19, 18, 5, 17, 16, 4, 0, 2, 15); the vendor's own "22" figure nets out the 3 input-only pads among them (34, 36, 39), confirming the 25-pad enumeration. Of esp32's soc.reserved_pins, strapping 0/2/5/12/15 are all exposed (5 pins, GPIO5 also the onboard BUILTIN_LED per the official arduino-esp32 d32/pins_arduino.h); input_only 34/36/39 are exposed (3 pins, already netted out of the vendor's 22); usb_flash_tied 6/7/8 are not on the header; GPIO35 (VBAT divider, confirmed by the same pins_arduino.h) is not exposed, so no separate onboard subtraction is needed -- 25 total pads - 5 strapping - 3 input-only = 17
  • usb_serial derived from usb.bridge (ch340)

Verify my board

Reads the connected chip over USB and checks it against what esp-atlas cites for LOLIN D32 — over Web Serial, no backend, nothing leaves your browser.

In-browser verify needs Web Serial: Chrome or Edge on a desktop. Safari, Firefox and phones cannot do it.

Serial monitor

Not connected.