Espruino Board v1.4

Espruino is a small computer that anyone can use to control things around them. Its JavaScript interpreter gives you instant feedback so that you can experiment and develop whatever your level of experience. Even if you've never written code before、you can still use the graphical code editor to write programs without typing a single word!
Features：Works on Windows、Linux、MacOS and Android(via Bluetooth or USB OTG)
Less than half the size of a business card just 54mm×41mm
Using the popular JavaScript language、Espruino supports Strings、Maps、Objects、and Dynamic Arrays right out of the box!
72Mhz ARM microcontroller with 256KB of Flash memory and 48KB of RAM
Micro USB connector、Micro SD card connector、and a JST Battery connector with a wide input voltage range of 3.6v to 15v
Red、Green and Blue LEDs、with 2 pushbuttons(one of which is reset by default)
Solder an HC-05 Bluetooth module(not included)directly onto the board and program and debug Espruino wirelessly!
44 GPIO pins on a 0.1''pin spacing、with 26 PWM pins、16 ADC pins、5 USARTs、3 SPI、2 I2C and 2 DACs
Power Consumption：35mA run、12mA sleep、<0.05mA in deep sleep
Prototype area which can be used for servo headers、wireless modules and SOIC surface mount parts such as motor drivers
Built in drivers for the TI CC3000 WiFi and WIZnet W5500 Ethernet modules(not included)、as well as a graphics library with vector font Open Source software and hardware
Espruino Website with full documentation、many tutorials、and an active forum
CE and RoHS Compliant
On-chip RTC with external 32kHz Oscillato