Features 1 pair of TTL level serial transceiver ports RX / TX Using Atmel Atmega328P-AU MCU There is a bootloader installed in it Support USB download and Power Support for external 5V ~ 12V DC power supply Support power supply by 9V battery Support ISP download Automatic reset during program download. Power OK blue LED on the bottom. Green (TX), red (RX) and orange (L) LED. Auto sensing/switching power input. Small mini-B USB for programming and serial monitor. ICSP header for direct program download. Standard 0.1” spacing DIP (breadboard friendly). Manual reset switch.
