Fishino GUPPY Fishino Guppy is a shrinked version of Fishino UNO and is 100% compatible with Arduino Nano, of which it retains connectors shape and position. Despite the small dimensions, it retains and even surpasses Fishino UNO s connectivity, adding 2 analog ports and providing a switching power supply which allows better efficiency, lower temperature and the ability to use a single cell LiPo battery to power it. Of the Fishino UNO board it misses just the RTC module, because of the small board space the WiFi module and the microSD connector, which characterise the Fishino board series, are present : Fishino Guppy Power supply: : 5Volt from microUSB connector 5 Volt in +5V pin from 6.5 to 20 Volt on Vin input single cell, 3.7 Volt LiPo battery on bat connector Digital levels : 5 Volt Controller : 8 bit ATmega 328p-au SMD Clock : 16 MHz Memory : 32 KBytes Flash 2 KBytes RAM 1 KBytes EEPROM I/O ports : 14 digital ports of which 6 PWM enabled 8 analogic inputs 2-6 additional 3.3V digital I/O on WiFi module 1 additional serial port on WiFi module 1 additional analog input on WiFi module Available interfaces : 1 x SPI 1 x I2C Additional modules on board : WiFi microSD connector Special features : Full switching power supplies Sketches can be uploaded by WiFiLinks : Official website, with technical details, libraries, demo, apps and firmware updates: www.fishino.com Open-Electronics website with an overview of all Fishino boards family, technical details, articles and demos: www.open-electronics.org/tag/fishino/