[Tuya Smart] IoT temperature and humidity sensor

Temperature and humidity sensor reference circuit If the ALERT pin is not used, it should be left floating. The nReset pin should be connected to a resistor with a typical value of 50K. The IIC pin should be connected to a 10k pull-up resistor. Periodic acquisition timing diagram ,] In the WB3S module, RXD2 and TXD2 are connected here. The output is to print the module information, and the ADC channel is led out. I think it may be useful in the future for USB to serial port . Almost every Lichuang event has drawn this one. It is more practical. The idea of ​​the buzzer is to make the buzzer sound when the temperature or humidity reaches a certain range. will sound, when an alarm is used, the module used for this Lichuang activity graffiti uses an MCU development solution, so the key parts need to be on the microcontroller. This activity has taught me a lot, thank Lichuang!