Design of Indoor Environmental Monitoring Systems Based on STC89C516

The method of design on indoor environmental monitoring based on MCU is presented. This system makes STC89C516 as the core,which includes several modules as follows,the measuring module of environment parameter,the clocking circuit,the power supply module,display module,alarm module and control modules. The main modules of the circuit and software flow frame are given. The results show that the system has strong stability,low cost and good extensibility.