● Uses STM32F103R8T6 as main control IC (64 pins)
● Supports JTAG， SWD debug mode
● Leads USART1， you can use the serial download
● RTC part may choose to use battery power， or the power supply system
● Use a jumper to select whether to use the USB interface， convenient USB Development Program
● PBO pins， connected a green LED light， convenient to debug. The board pre-burn the test program and green LED will flash evenly when power on， sending data constantly to serial port
● Convenient to detect whether the module works normally

Frequently Asked Questions:
Q1. Why are these called Arduino Compatible?
A1. The Arduino group demanded us to remove their logos and rename these products so that they do not lead customers to believe they are the same units sold by Arduino
Q2. Are these 100 percent compatible with the normal Arduino's?
A2. Yes， they really are completely compatible with normal Arduino's. Build quality looks the same and everything (studio， library， tools， etc) just works