... , processing and analysis requirements * Board outside 128M NAND FLASH expand to meet the rich color of the picture storage, data storage ... * Two-way RS232 interface * All the way RS485 communication interface* An SD card connector SDIO control* A I2C memory interface, the ... -source: LED lights into the water six examples, RTC, according to health, PWM, buzzer, USB, SD card, ADC, DAC, 12C, RS232, RS485 ...