Week #4

In this weeks work, we started getting all of the components to work together. Originally, the electronic door lock that we purchased just came with the lock itself, with no other instructions. We used a power supply in the WB100 labs to see which of the screws is power and which is ground. We used the power supply to deliver a 12v power supply to the lock. It then established which was power and ground so we could cut a cable and added a header so we could plug it into the breadboard. The 12v was the only piece of information that we found from the website we brought the part from. This meant we had to give the Arduino board a 12v power supply and had to step it down with a TIP120 transistor.

We then had to combine the code for the fingerprint sensor and the bluetooth module as we had originally tested them separately. What we did was create functions for both inputs , and then added them to the function which checked if any of these functions were true, it gave the power to the electronic door lock.