Hardware Reference
In-Depth Information
point. The Vin pin of the Bluetooth module has to be connected to the red power
rail, and the GND pin has to be connected to the blue power rail:
3. You can now place the 10uF capacitor between the DTR pin of the Bluetooth
module and the RESET pin of the Arduino board. Make sure you have the negat-
ive side of the capacitor (marked with a gray line) connected to the Arduino
RESET pin.
4. Then, you can place the DHT sensor on the board. We are going to connect the
DHT sensor to the power first. The VCC pin (pin 1) of the DHT sensor has to be
connected to the red power rail, and the GND pin (pin 4) has to be connected to
the blue power rail of the breadboard. The following image shows how it should
look at this point:
5. Finally, you have to connect the SIG pin (pin 2) of the DHT sensor to the Arduino
pin number 7. You also need to connect the 4.7k ohm resistor between the VCC
pin of the sensor (pin 1) and the SIG pin.
6. For the Bluetooth module, you will have to connect the TX pin to Arduino's RX
pin and the RX pin to the Arduino TX pin.
The following image will give you an idea of what you should end up with:
