Introduction - If you have any usage issues, please Google them yourself
STC89C516RD based multi-function temperature and voltage monitoring and control module. Has DS18B20 temperature detection, 0 ~ 5V voltage detection, real-time clock, relay outputs, stepper motor control. By 12864 (no font) and change the administrator password to access the menu button , time set, date set, alarm settings, high and low temperature alarm, reversing the stepper motor, precise control steps. and the engineering schematic, PCB board map (PADS environment).