Environmental monitoring and control based on STC32G

The main control chip is STC32G12K128, featuring a button circuit, 7 relay circuits, 3 temperature and humidity detection modules, 1 gas detection module, 1 light intensity detection module, a 1.69-inch TFT color screen, a power supply module, and a WiFi module.

Environmental data acquisition includes two NTC temperature sensors and one DHT11 temperature and humidity sensor. It detects combustible gases, triggering an alarm when the threshold is reached; it detects light intensity, activating the lighting relay when it falls below the threshold.
The TFT color screen displays temperature, humidity, light intensity, and gas values. It also displays the status of each relay.
The app, "DianDeng Technology," allows real-time monitoring of the environment and control of modes and relays.

The power supply circuit includes Type-C or direct 5V power, a self-locking switch, and LED indicators.
An LDO (5V to 3V3 converter) powers the 8266 module.
The button circuit includes a pull-up
NTC sampling circuit using voltage divider, capacitor filtering, and ADC acquisition.
Serial ports 1 and 4 are pull-up; serial port 1 is used for program download, and serial port 4 serves as the host computer interface.
Serial port 3 supports WiFi communication.
A TFT color screen with SPI communication.
Seven identical relay circuits; relay modules can be freely switched according to the required load.