The I2C example was named "Wire" in the Arduino example. The Arduino example uses A4 as the I2C SDA and A5 as the I2C SCL. Another important thing is that the GND pins of Arduino and Ameba should be ...

* - Connect the Qwiic Soil Moisture Sensor to the Qwiic connector of your development board (SparkFun Thing Plus, ReadBoard ...etc.) * If you don't have a development board with a Qwiic connector, you ...