How does the Xiaomi Smart Temperature and Humidity Monitor 3 connect to the humidifier?

The Xiaomi Smart Temperature and Humidity Monitor 3 can only be connected to the humidifier through a Bluetooth gateway, please refer to the following steps:
1. Bind the Xiaomi Smart Temperature and Humidity Monitor 3, the humidifier and Bluetooth gateway under one Xiaomi Account, and the distance between the Bluetooth gateway and the Xiaomi Smart Temperature and Humidity Monitor 3 cannot exceed 5m;
2. Open the [Mi Home/Xiaomi Home] APP, tap [...] at the right top of the homage, tap [Automation], tap [+] at the right top of the screen, tap [Automation], tap [Xiaomi Smart Temperature and Humidity Monitor 3] to set the condition you want, tap [Add an action] to select the humidifier and select the action, and the humidifier will follow the action that you set.