Arduino is an open-source physical computing platform based on a simple i/o board and a development environment that implements the Processing/Wiring language.  

Ultrasonic Mist Maker Humidifier, 5V Atomization Disc 108KHz Mist Atomizer DIY Humidifier with PCB, DIY Mist Atomizer Micro USB Board Ultrasonic Atomization Module for Home 

Arduino Nano 33 IoT with headers

SIM808 GSM/GPRS/GPS Bluetooth Compatible Development Board With GPS Antenna COM45 ,R17

"Nextion NX8048T050 5 inch Resistive Touch Screen Man-machine interface HMI kernel

Nextion NX4024T032 3.2 Inch display Man-machine Interface HMI Touch Screen

MOD-TCA9548A CJMCU-9548 TCA9548A 1-to-8 I2C 8-Channel IIC Multiplexer

ARDUINO YUN REV 2 ABX00020 ATmega32U4 Development Board

ARDUINO UNO WiFi REV2

Arduino DUE 2013 (ARM 32 BIT- Cortex M3)

mini micro sd card reader module

GY- SGP30 AIR QUALITY GAS SENSOR TVOC ECO2 CARBON DIOXIDE MEASUREMENT FORMALDEHYDE MODULE