LOLIN(WEMOS) D1 mini Pro
Enhanced D1 Mini with external antenna support - ideal for extended range or enclosure use.
34.2 × 25.6 mm
ESP8266
MCU
160MHz
clock
16MB
flash
~80KB
SRAM
17· 1 ADC
GPIO
Wi-Fi
radio
Pinout
Getting started
flash your first firmware in ~2 minutes1
Connect over USB
Uses a CP2104 bridge - install the CP210x driver if no port appears. Not detected? Hold BOOT while plugging in.
2
Match & flash
Set the Tools options shown, then click Upload.
3
Verify it runs
The onboard LED on GPIO2 blinks - swap the pin if your board's LED differs.
Set these in Tools · leave everything else at default
Arduino IDE 2.x - Tools Copy
Board: "Generic ESP8266 Module"▸
Flash Size: "16MB (128Mb)"▸
CPU Frequency: "160 MHz"▸
Upload Speed: "921600"▸
▸ every other Tools option - leave at default
Board: Generic ESP8266 Module Flash Size: 16MB (128Mb) CPU Frequency: 160 MHz Upload Speed: 921600
Find it: Tools ▸ Board ▸ ESP8266 Boards ▸ Generic ESP8266 Module
// blink the onboard LED
void setup() {
pinMode(2, OUTPUT);
}
void loop() {
digitalWrite(2, HIGH); delay(500);
digitalWrite(2, LOW); delay(500);
}Specifications
ESP8266 · 34.2 × 25.6 mmCompute
MCU
ESP8266
Clock
160 MHz
SRAM · Flash
~80 KB · 16 MB
Radio
Wi-Fi
802.11 b/g/n
Bluetooth
-
Antenna
PCB
I/O
GPIO · ADC
17 · 1
UART · I²C · SPI
2 · 1 · 2
PWM
-
Power
USB
Micro-USB
Serial
CP2104
Boot address
0x0000
Flashing
Upload · OTA
esptool · esp_ota
Flash · Boot mode
DIO · -
Sketch · Data
- · 80 KB
34.2 × 25.6 mm · pin pitch 2.54 mm
The LOLIN(WEMOS) D1 mini Pro uses esptool for firmware uploads, esp_ota for over-the-air (OTA) updates. Flash mode is DIO.
About this board
The WeMos D1 mini Pro (also written as LOLIN D1 mini Pro or Wemos D1 mini Pro) is an upgraded ESP8266 version of the popular D1 mini board with 16 MB of flash. It pairs a built-in ceramic antenna with an external u.FL/IPEX antenna connector, selectable via a small 0-ohm solder jumper, in the compact D1-mini form factor with shield compatibility. It's a good fit for Wi-Fi IoT projects needing better range or more flash. In this guide, you'll find the WeMos D1 mini Pro pinout, datasheet, technical specs, and setup instructions.
Resources
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