Smart Temperature Sensor

My recent experiment with DS18B20 waterproof temperature sensor probe and ESP-01. The idea was to design such device which can monitor and log temperature of my 109 gallon Fish Tank, and also I can check the temperature from any part of the world. So I decided to use ESP-01 chip.

I have designed enclosure and PCB in house. I used Laser Engraving method to etch the PCB and 3D printed the enclosure around the PCB using PLA. The challenge was to design the device in Thermometer Shape.

The circuit was designed in Autodesk Eagle, with all the required components.

I have used OpenSCAD for enclosure designing.

I exported image file from Eagle and processed it to GCode so that my laser software can accept.
First I spray painted the Copper surface followed by Blank Copper Clad cleaning. After that I left it for 20 minutes to cure the paint in well ventilated space. Once cured I etched the board with Laser and laser removed places where copper needs to be removed. After that I used the FeCl3 (Ferric chloride) solution to remove unwanted copper.

The results can be viewed in the images attached.

I cut down the PCB in the required shape using saw and drilled holes for components and mounts.

Finally, I have assembled all the parts shown in the images.

PCB was not masked as it was just a prototype. But by doing fabrication in house, I can visualize and feel the product without any hassle.

I have not covered Programming Part here as there are already lots of tutorials available on instructables. But for the information I have used Blynk Self hosted Server to monitor the temperature.