Next, we define the constant DHT11PIN, which represents the digital pin to which the DHT11 sensor is connected. In our case, we designate pin 4 as the communication pin with the sensor. Then, we ...

This setup features an Arduino Uno CH340G clone connected to a DHT11 temperature and humidity sensor and a USB-to-Serial adapter (CP2102 module). The DHT11 sensor is connected to digital pin 2 for ...