Wemos D1 Pro Mini 

• 11 digital input/output pins
• Interrupt/pwm/I2C/one-wire
• 1 analog input(3.2V max input)
• 16M bytes(128M bit) Flash
• External antenna connector
• Built-in ceramic antenna
• New CP2104 USB-TO-UART IC
• Same size as D1 mini, but more light