No
No
N/A
LOLIN D32
Wemos ESP32 board with LiPo charger and USB - ideal for battery-powered projects and embedded apps.
57 × 25.4 mm
ESP32
MCU
240MHz
clock
4MB
flash
520KB
SRAM
2· Two 12-bit, 18 Channels ADC
GPIO
BLE 4.2+ WiFi
radio
Pinout
2 pins · 2.54 mm pitch
| Pin | GPIO | Labels | Status | Capabilities | Notes |
|---|---|---|---|---|---|
| 1 | 5 | LED_BUILTIN | strapping | - | |
| 2 | 35 | _VBAT | strapping | - |
Fine - with a little care
sampled at boot or shared with debug/serial| Pin | Label | What to know | Role |
|---|---|---|---|
| LED_BUILTIN | GPIO5 | Must be HIGH during boot; if pulled LOW at reset, alters SDIO slave timing and may prevent normal boot. | Strapping |
| _VBAT | GPIO35 | Cannot be used as output; only suitable for input. | Other |
These are recommendations, not hard rules - with the right pull-ups, timing and boot-state awareness most pins can be made to work. When in doubt, start green.
Pinout notes All 2 pins on the LOLIN D32 are usable GPIO, spaced at the standard 2.54 mm pitch. 2 of the exposed pins carry boot-time or system duties on the ESP32 (…
All 2 pins on the LOLIN D32 are usable GPIO, spaced at the standard 2.54 mm pitch.
2 of the exposed pins carry boot-time or system duties on the ESP32 (LED_BUILTIN and _VBAT) - check the guidance above before wiring anything to them.
Getting started
flash your first firmware in ~2 minutes1
Connect over USB
Serial chip: CH340C. Not detected? Hold BOOT while plugging in.
2
Flash with your tool
Arduino IDE, PlatformIO, ESPHome or esptool - copy the settings on the right.
3
Verify it runs
The blink example uses GPIO8 - swap for your board's LED pin if different.
Board: Lolin D32
Flash Size: 4MB · DIO
Upload Speed: 921600
// blink
pinMode(8, OUTPUT);
digitalWrite(8, LOW); // on (often inverted)[env:d32]
platform = espressif32
board = esp32dev
framework = arduino
monitor_speed = 115200
upload_speed = 921600esp32:
board: esp32dev
variant: d32
framework:
type: esp-idf
# blink - GPIO8
output:
- platform: gpio
pin: 8
id: led_out
light:
- platform: binary
name: "LED"
output: led_outesptool.py --chip esp32 --port /dev/ttyACM0 \
write_flash 0x0 firmware.binBuild details: sketch space 1310720 B · data 327680 B · DIO
Specifications
ESP32 · 57 × 25.4 mmCompute
MCU
ESP32
Clock
240 MHz
SRAM · Flash
520 KB · 4MB
Radio
Wi-Fi
802.11 b/g/n
Bluetooth
4.2 LE
Antenna
PCB
I/O
GPIO · ADC
2 · Two 12-bit, 18 Channels
UART · I²C · SPI
3 · 2 · 4
PWM
16 channels
Power
USB
Micro-USB
Serial
CH340C
Boot address
0x1000
Flashing
Upload · OTA
esptool_py · esp_ota
Flash · Boot mode
DIO · DIO
Sketch · Data
1.25 MB · 320 KB
57 × 25.4 mm · pin pitch 2.54 mm
The LOLIN D32 uses esptool_py for firmware uploads, esp_ota for over-the-air (OTA) updates. Flash mode is DIO with DIO boot mode. The maximum sketch size is 1.25 MB with 320 KB available for data.
About this board
Inside sits the ESP32 - a dual-core Xtensa with both Bluetooth Classic and BLE.
At $6.50 it's cheaper than most ESP32 boards, which usually run around $20.
Only 2 GPIO are broken out, where most ESP32 boards manage about 24 - worth checking the pinout covers what you need.
Around the module: battery charging (TP4054) via JST-PH 2.0, status LEDs (User (GPIO5), Charge) and Reset buttons.
Where to buy
prices are typical street pricesLOLIN D32
$6.50per unit, typical
Resources
Similar boards
