1. Introduction

This project is the work of a training camp jointly conducted by Lichuang and Tuya Smart. Based on the Tuya smart temperature and humidity sensor solution, and combined with the STC8A8K64S4A12 (Lichuang No.: C84390) microcontroller, several functions can be implemented.

Chips used: main control STC8A8K64S4A12, USB interface step-down LM1117S-3.3, USB to TTL circuit CH340G, temperature and humidity sensor SHT30, network module TUYA-WBR3.

Assembly module: OLED display, buzzer module.

External modules: soil moisture detection module, water level sensor, voltage reduction module, motor drive module.

2. Sources of creativity

Stack several questions designed by STM32 courses together.

3. Implement functions

1.   Detect the temperature of the current environment. The temperature can be viewed on the mobile phone.

2.   Detect soil moisture information. 

3.   OLED display enables data visualization.

4. The soil moisture information cooperates with the soil moisture monitoring module to automatically pump water to water the flowers.

5. The water level sensor detects the vacancy of the pool. If the water level is lower than the warning line, the buzzer will alarm.