Soil metrics

SoilMetrics

A Portable AI & IoT-Based Soil Health Monitoring Device

Overview:

SoilMetrics is an affordable soil health monitoring system to measure key soil parameters in real time such as NPK, EC, pH, Moisture, and Temperature. which will allow small farmers to make scientific decision regarding their soil health and conditions which can help them do sustainable farming.

What can it do?

This device can measure soil moisture, temperature, pH, electrical conductivity, and NPK. and then can send all that data to a cloud server using LTE. it also offers on device touch display to view sensor readings, ai reccomendations, weather reports etc. with help of offline sd card based data logging, and rechargeable 2S 18650 its a near perfect solution to deploy on farmsites for primary soil health monitoring.

Hardware Specifications:

• MCU - ESP32-S3-WROOM1U-N16R8
• Cellular & GPS - SIM7080G
• Soil Sensor - ZTS-3002-TR-*-N01
• Display - SmartElex 3.5" TFT Resistive Touch Display 320x480

Repo Structure:

SoilMetrics/
│
├── assets/   images
├── cad/       CAD source files & exports
├── firmware/       ESP-IDF firmware
├── kicad/          kicad source file
├── production/     BOM & gerber
│
├── README.md
├── LICENSE
└── JOURNAL.md

Hardware:

Schematic:

Contains all the power realted things of the device including Type-c for programming, barrel jack for charging, BMS circuitory, Buck Converter and LDOs

Contains the MCU, Buttons, LTE module, Receiver, SD card, sim slot etc

PCB:

The hardware is designed on a 4 layer PCB, The complete design files are available here

Enclosure

Firmware

Note: The complete firmware is not available as of now, there are lot of things that can only be written after making actual hardware, so i will update the repo with complete firmware after build. For now its just a test code.

Configure ESP-IDF

idf.py set-target esp32s3

Build

idf.py build

Flashing Firmware

Connect the board using USB.

Flash

idf.py flash

Open Serial Monitor

idf.py monitor

If flashing fails, place the board into download mode according to your ESP32-S3 hardware design and retry the command.

How to Assemble

1. order all the components and pcb
2. solder them
3. flash the firmware
4. test it
5. 3d print the enclousure
6. put them all together

Enclosure:

Enclosure is not complete yet due to the online unavailability of 3d model of the Display. After getting the display i'll update the repo with correct files

Bill of Materials

The completed BOM of the components used on PCB is in production/bom.csv.

And expect those you need to order these:

Made with 🔬🧪 (science) by aryan-git-byte

# AI USE: AI has assisted me in firmware/