Serial port communication function
Analog input acquisition function
Digital input acquisition function
Digital output functions
Data storage function
SD card access data function
Real-time clock function
Low power consumption function
GPS function (option: internal gps module)
Power management function
LCD display and touch input function(option:Serial port expansion peripheral)
WIFI function(option:Serial port expansion peripheral)
Lora communication function(option:Serial port expansion peripheral)
ZigBee communication function(option:Serial port expansion peripheral)
