Before starting to design, I had made a project with multiple modules to verify. The modules I prepared:

• Maduino A9G module
• An anemometer
• DHT11 module
• Buzzer

I use the A9G module to report the data with MQTT, and use the ESP32 module with a display to subscribe to the data from the MQTT broker. 

You can click here to view the detail of the test if interested.