Table 2 Description of the hardware layer components.
Category | Components | Description | Working range |
|---|---|---|---|
Microcontroller | Raspberry pi 5 | Broadcom BCM2711, Quad-core Cortex-A76 (ARM v8) 64-bit SoC @ 1.8 GHz | 0—50ºC, 5 V/3 A DC or 5.1 V/ 3 A DC |
Display | Touchscreen display | 7-inch, 800 × 480 mm | high resolution of 1024 × 600 pixels |
Communication module | GSM S808 | Quad-band 850/900/1800/1900 MHz, GPRS multi-slot class 12/10, GPRS mobile station B | -40℃ ~ 85℃, max. 85.6 kbps |
Sensor | SHT30 | An outdoor waterproof, ± 2% relative humidity and ± 0.5 °C accuracy for most uses | - 40—125 °C, 0—100% RH, 2.4 – 5.5 V |
7 in 1 NPK | Integrated soil sensor for industrial, high precision, for multi-parameter that integrates Temperature, Humidity, Nitrogen, Phosphorous, Potassium, Electrical conductivity, and Hydrogen potential | 12–24 V DC -40 ~ + 80 °C, 0–100%RH, NPK: 0–1999 mg/kg, | |
BM300 Rain & Snow Sensor | Sensitive detector to achieve qualitative detection of rain and snow | 5% RH ~ 90% RH, -30 ~ 85℃, | |
Power system | Step-down booster | DC Step Up and Down Power Supply Module | Input range of 4 V to 20 V |
Charge controller | Build-in industrial microcontroller 12 V/24 V auto, with LCD, all adjustable parameters, and fully 4-stage PWM charge management | 12 V/24 V auto, with LCD, and fully 4-stage PWM | |
Battery | Long battery life, high capacity | 7 mA |
