In the first section, we introduced how to set up a gateway. With a gateway, we can add various sensors to it. In this issue, we come to DIY "Intelligent Temperature and Humidity" so that we can check the temperature and humidity in our home in real time.
This time we will use the NANO development board and dedicated expansion board as controllers, which is very easy to operate.
Here are the main accessories we need to use this time:
Other accessories are: Micro USB cable X1, 9V~12V/1A power adapter X1
Plug the nRF24L01 module into the corresponding interface on the NANO IO shield board, and then connect the NANO to the shield slot. The DHT11 module is connected to the A2 electronic building block interface.
The circuit connection is very simple. One thing to note is that the DHT11 DuPont line should not be connected when connected to A2. GVS corresponds to G + S.
The final picture is as follows:
By the way, let's say to everyone: Our DHT11 sensor has two interfaces: the universal 3pin DuPont interface and the 4Pin grove interface. The Grove interface has a snap to prevent loose wiring. The white interface cable is a dedicated 4pin to 3pin grove. Use one of the interfaces when you use it.
High Frequency Flyback Transformer
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