Central air-conditioning temperature and humidity detection system hardware schematics

Central air-conditioning temperature and humidity detection system hardware schematic diagram is shown below. Temperature and humidity detection module with AT89S52 of P1.0 port is connected, and then a 4.7 Kohm pull-up resistors on P1.0 mouth. It includes temperature and humidity detection and single-chip processing, keyboard input and display output.

Figure central air temperature and humidity detection system hardware chart