raschemmel:
Your schematic shows arduino d6 & d7 connected to IN3 & IN4.
Your photo shows the a sensor shield connected . I don't see any processor chips on that sensor shield so it must be controlled by the arduino. Why is the motor driver connected to the sensor shield ?
You said you haven't actually done any testing yet so how did you come up with this wiring ?
Why are you not using analog pins on the arduino for the PWM Enable signals for the motor ? (only one , right?)
What kind of signal is that sensor shield providing to the motor driver ?
Where did you come up with that wiring ?
Yes it's going through the arduino.
I followed this tutorial for the wiring : http://www.instructables.com/id/Arduino-Automatic-Watering-System-For-Plants/step3/Install-the-pipe-pump/
The motor driver is connected to the sensor shield because of the way it is on the tutorial, however from looking around i think it's possible to do this without the sensor shield and just a arduino uno.
I don't understand the kind of signal that the sensor shield is providing the motor driver, i think the sensor shield is providing the information on the moisture levels in the plant?
I am using analogue pins(they go into the soil right?) it' just that I couldn't fit them in the picture.
The wiring was from the tutorial shown on instructables.
thanks