[Tuya Smart] IoT thermometer and hygrometer +484343S

1.Program Overview

1. Short press the left button once to switch RGB colors, red-green-blue-yellow-purple-cyan-white-breathing gradient
2. Press and hold the right button to control the Tuya WIFI module network configuration and report temperature and humidity data in real time
3. When the temperature reaches the threshold, the buzzer alarms and the fan motor turns on.
4. Set the humidity threshold, turn on the ultrasonic atomizer when it is not reached, and turn it off when it is reached.

2. Overview of components

1. The main control of this program is the domestic enhanced 8051 microcontroller CA51S003.
2. Select SHT30 for temperature and humidity sensor (completed)
3. Display module selection OLED12864 (completed)
4. .Choose four 3528 package RGB lights for the ambient light, and configure them with a 3-way PWM microcontroller (completed)
5. Buzzer selection passive buzzer driving frequency 2.7Khz (completed)
6. The motor is an ordinary DC 5V motor (not completed)
7. For ultrasonic atomizer, choose the atomizing piece and the driving frequency is 108Khz (not completed)

3. Problems encountered during the development process. The PCB 1.0 version was drawn the night before I took the time to finish it. Therefore, I did not check it carefully, which resulted in the serial port and WIFI module communication pins being connected in reverse, and the button direction being wrong. PCB1.0

PCB1.1 SHT30 reads data. For this purpose, I tested a program using the DHT11 temperature and humidity sensor. The two humidity data are quite different. The judgment may be related to the breadboard and PCB.

SHT30 OLED test When the program turns on the OLED display, the button lighting program fails. It is judged that the cause may be the timer.

Tuya Smart APP display

environmental value

finger placement

3. Conclusion I am very grateful for this training camp opportunity of Lichuang EDA and Tuya Smart. As a new graduate, there are still many things I am not familiar with. I hope I can continue to study hard.