How to Make Arduino Automatic Temperature& Humidity Controller

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The following parts were used in this project:

Arduino UNO, https://amzn.to/3ihYFBl

1.3 inch 128 x 64 I2C OLED Display Module, https://amzn.to/3gTMZnW

DHT11 Temperature & Humidity sensor, https://amzn.to/3gTMZnW

MB-102 3.3V/5V Power module, https://amzn.to/3gTMZnW

5V relay module, https://amzn.to/3gTMZnW

DV 5V , 300mA , 2W , 108KHz Atomization humidifier

DC 12V charger (6.5V-12V) Breadboard, https://amzn.to/3gTMZnW

Jumper wires, https://amzn.to/3gTMZnW

The atomizing humidifier module has two working modes, the first is that it can work independently after power on. The second is that after power on, you must press the switch to work. In order to allow the atomizing humidifier module to work independently, this project chose the first working method of the atomizing humidifier.

At the beginning, I wanted to connect pin 2 of the arduino uno directly to the atomizing humidifier, and control the high level of pin 2 to make the atomizing humidifier work, and the low level to make it not work. However, the current of the digital signal port of the arduino uno is too small to support the normal operation of the atomizing humidifier, and there is too little fog when working. So a 5V relay and MB102 power module are used to make the atomizing humidifier work normally.

Install the Library file: Open "Tools"-"Library Manager" in the Arduino development software, then search for “ DHT sensor ”, and then install it.

Choose the development board as Arduino UNO, this is to choose the right.

Select the serial port corresponding to the development board, you can burn the code into the development board.