Hardware Reference
In-Depth Information
Making hardware connections
It's now time to make the hardware connections of the project. You need to connect three
things: the CC3000 Wi-Fi chip to the Arduino board, the current sensor to the Arduino
board, and the power cables to the current sensor.
Because we have several devices to power, I suggest that you should first connect the red
power rail to the Arduino 5V pin and the blue power rail to the Arduino GND pin.
There are quite a few pins to connect for CC3000; therefore, follow the instructions care-
fully so that the module can work correctly. First, connect the IRQ pin of the CC3000
board to pin number 3 of the Arduino board, VBAT to Arduino pin 5, and CS to Arduino
pin 10. After that, you need to connect the remaining SPI pins to the Arduino board. The
pins called MOSI, MISO, and CLK go to Arduino pins 11, 12, and 13, in this precise order.
The current sensor is quite easy to connect. Connect the V pin to the red power rail, the G
pin to the blue power rail, and the S pin to the analog pin A0. The following image shows
what the system should look like at this point:
The following schematic figure summarizes the different connections so far:
