Week 15-17
Mar 14 - Apr 1
Mar 14 - Apr 1
Our HC-06 Bluetooth module didn't work and so we had bought an HC-05 version of the same brand Bluetooth module thinking that this might be our problem. We made sure to set up and wire the Bluetooth module correctly to the Arduino and to set up the Arduino code (which required correct ports, uploading, etc, and came with some problems that we had to work through). Even then, when trying to pair and connect the Bluetooth module to Deniz's android phone (Google Pixel 6), it was not working no matter what we did.
At this point we had spent money on multiple modules and lots of time trying to get the Bluetooth module to work, we decided to look for another option in order to Bluetooth connect the Arduino to our android app. We found a relatively cheap Arduino that had Bluetooth built into it so that we wouldn't need to use a separate module, and we will be attempting to implement this once the order arrives.
In the beginning of this interval, we tried using the mister from the face mister set by connecting it directly to a battery which did not end up working, and we learned that the mister would need AC power to function not the DC power from the battery. When we tried soldering the mister to back onto the circuit, it ended up not working. We ordered another mister off amazon, and managed to get it working by using a power cord adapter that we also got from amazon. The mister was working well in one of the Petri dishes that we got from the science department, so we decided to solder the circuit to make it so that it would be perpetually on when provided power. After this success, we decided to 3D print a small mount that would allow it to stay in place on the water. Unfortunately, when trying to use the mister mount, one of the wires connected to the water mister ended up snapping, and despite our efforts to solder it back on, it still would not work. So, we ordered a new mister.
Connecting the Power
Getting petri dish and water
Soldering the button
We had to solder the button to make sure that the button on the mister's circuit is always on, so that we can control the mister remotely using the Arduino.
Water mister working for the first time/explanation of our plans
Creating a holder for the water mister
The new Ultrasonic Atomizer (mister) is bigger than the one that came with the full mister we bought. So it won't fit in the case.
But the Ultrasonic Atomizer fits on the plastic casing. It stays on because the silicone circle stays between the plastic. But it would be a big problem if it separated unexpectedly. We decided to 3d print a casing that would hold the Ultrasonic Atomizer to the water holder. It is a clamp with a space for the wire to come out and for the mist to come out on the top.
Here is the 3d printed holder on the casing. There is tape to make sure the silicone plug doesn't come out. That plug is where you fill up the water.
Soldering the water mister back together
New orders (from left to right): arduino with built-in bluetooth, water misters