[Tuya Smart] Tuya Smart Thermohygrometer

The IoT temperature and humidity meter based on Tuya's smart code-free solution uses Lichuang EDA to complete the schematic and PCB design with reference to the schematic diagram provided by Tuya. The power supply part is simplified, leaving a lithium battery interface directly to provide 3.3V voltage to the circuit through an LDO. The circuit is designed with a battery monitoring function, and the battery voltage is monitored through the Tuya module ADC. There is only one button on the circuit board, which is used for network distribution operations. The temperature and humidity sensor uses the SHT30 chip, and the circuit board is slotted for isolation to reduce external influence on the chip temperature measurement. The serial port reserves test points in the circuit for debugging.

In addition, inexperienced students should pay attention to protection when welding the SHT30 chip. You can stick high-temperature tape on the front of the chip. I didn't have any protection when welding, and I also brushed it with alcohol. I felt that the humidity was inaccurate. Remember.