Wemos D1 Mini Wifi IoT Development Board

The D1 mini is a mini wifi board based on ESP-8266EX. ESP-12F

✅11 digital input/output pins, all pins have interrupt/pwm/I2C/one-wire supported(except D0)
✅1 analog input(3.3V max input)
✅ Micro USB connection
✅ Compatible withArduino
✅ Compatible with nodemcu

✅Technical specs
Microcontroller = ESP-8266EX
Operating Voltage = 3.3V
Digital I/O Pins = 11
Analog Input Pins = 1
Clock Speed = 80MHz/160MHz
FLash = 4M bytes
Length = 34.2mm
Width = 25.6mm
Weight = 10g

✅Pin Function ESP-8266 Pin
TX TXD TXD
RX RXD RXD
A0 Analog in(max 3.3V) A0
D0 IO GPIO16
D1 IO, SCL GPIO5
D2 IO, SDA GPIO4
D3 IO,Pull-up GPIO0
D4 IO,pull-up,LED GPIO2
D5 IO, SCK GPIO14
D6 IO, MISO GPIO12
D7 IO, MOSI GPIO13
D8 IO,pull-down, SS GPIO15
G Gound GND
5V 5V -
3V3 3.3V 3.3V
RST Reset RST

✅Programming
The D1 mini has a micro USB for auto programming.
Also you can programming it using OTA

✅Warnings
All IO works at 3.3V.