To measure the temperature & humidity in the soil, you will need an appropriate sensor. For this guide, I used the Soil Temperature/Moisture sensor from Adafruit, which is based on the SHT10 sensor from Sensirion. It's quite easy to use with Arduino as there is a dedicated library, so it will be easy to interface with our project.
Finally, you need a breadboard and some jumper wires to make the connections between the different parts.
Basically, you need to connect the IRQ pin of the CC3000 board to pin number 3 of the Arduino board, VBAT to pin 5, and CS to pin 10. Then, you need to connect the SPI pins to the Arduino board: MOSI, MISO, and CLK go to pins 11,12, and 13, respectively. Finally, take care of the power supply: Vin goes to the Arduino 5V, and GND to GND.