Table of Contents
My final project is the COSMIC PEPPER PIG which is a smart automated system for pepper growth. It will take in 2 inputs: soil moisture and temperature and its designated corresponding outputs will be: a fan, a water pump and an OLED to display the real time data. I will be using Xiao ESP 32 c3 as the microcontroller. To make this project fun and interesting for myself, I designed the enclosure similar to a cosmic pig. Check it out.
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BOM-Bill of Materials
Component Name | Specification | Price (Nu.) | Price (USD) | Quantity | Total Cost (Nu.) | Online or Local Market |
---|---|---|---|---|---|---|
Soil moisture sensor | Capacitive V2.0 | 54 | 0.65 | 1 | 54 | Available in the lab |
DHT22 | AM2302 | 121 | 1.46 | 1 | 121 | Available in the lab |
LDR | Photoresistor | 149 | 1.80 | 1 | 149 | Available in the lab |
4 channel relay | 5V module | 219 | 2.64 | 1 | 219 | Available in the lab |
Water pump | Submersible | 398 | 4.80 | 1 | 398 | Available in the lab |
Xiao ESP32 C3 | Wi-Fi + BLE | 471 | 5.67 | 1 | 471 | Available in the lab |
LED bulb | 12V DC | 159 | 1.91 | 1 | 159 | Available in the lab |
240V to 12V converter | Step down | 190 | 2.29 | 1 | 190 | Available in the lab |
USB Wall charger | 5V 1A | 190 | 2.29 | 1 | 190 | Available in the lab |
Fan | 3-inch DC | — | — | 1 | 0 | Available in the lab |
Plastic Polyethylene | 2m x 2m | 100 | 1.20 | 1 | 100 | Available in the lab |
PLA filament for 3D printing | Deep Blue, 2 kg | 849 | 9.95 | 2 | 1698 | Available in the lab |
4mm wood | Laser cutting (30cm x 20cm) | 40 | 0.47 | 1 | 40 | Available in the lab |
18mm wood | CNC (2400mm x 1200mm) | 1200 | 14.06 | 1 | 1200 | Available in the lab |
Vinyl sticker | Yellow Glossy Wrap | 249 | 2.92 | 1 | 249 | Available in the lab |
Total (Nu.) | 5637 | (All Available in the Lab) | ||||
Total (USD) | $66.41 USD |
This is the custom board that I created.


You can access the files here
Boards that i used-power and my main MCU
All of the designs for my final project