提供安防系统电路原理图和仿真功能，通过MCP3204 采集烟雾浓度、入侵压力信息、红外信息，送入CPU进行处理和判断，当超出界限值时，系统报警，并通过串口发送消息给GSM，提示用户。(Provide the schematic diagram and simulation function of the security system, collect smoke concentration, intrusion pressure information and infrared information through MCP3204, and send it to CPU for processing and judgement. When the limit value is exceeded, the system will alarm, and send messages to GSM through the serial port to prompt users.)