Circuit Documentation

Summary

This document provides a detailed overview of a circuit involving an ESP32 microcontroller, an SD SDHC card module, a BH1750 light sensor, an NPK sensor, a soil temperature sensor, and a capacitive soil moisture sensor. The document includes a component list, wiring details, and documented code for the microcontrollers.

Component List

ESP32

• Description: A powerful microcontroller with Wi-Fi and Bluetooth capabilities.
• Pins: EN, VP, VN, D34, D35, D32, D33, D25, D26, D27, D14, D12, D13, GND, VIN, 3V3, D15, D2, D4, RX2, TX2, D5, D18, D19, D21, RX0, TX0, D22, D23, BOOT

SD SDHC

• Description: A module for interfacing with SD and SDHC memory cards.
• Pins: 3V3, CS, MOSI, CLK, MISO, GND

BH1750

• Description: A digital light sensor.
• Pins: VCC, GND, SCL, SDA, ADDR

NPK Sensor

• Description: A sensor for measuring soil nutrient levels.
• Pins: VCC, A, B, GND

Soil Temperature Sensor

• Description: A sensor for measuring soil temperature.
• Pins: VCC, SDA, GND, SCK

Capacitive Soil Moisture Sensor V1.2

• Description: A sensor for measuring soil moisture levels.
• Pins: GND, VCC, AOUT

Wiring Details

ESP32

• D32 connected to SD SDHC CS
• D33 connected to SD SDHC MOSI
• D25 connected to SD SDHC CLK
• D26 connected to SD SDHC MISO
• D27 connected to BH1750 SCL
• D14 connected to BH1750 SDA
• D12 connected to NPK Sensor A
• D13 connected to NPK Sensor B
• GND connected to SD SDHC GND, BH1750 GND, NPK Sensor GND, Soil Temperature Sensor GND, Capacitive Soil Moisture Sensor V1.2 GND
• VIN connected to BH1750 VCC, NPK Sensor VCC, Soil Temperature Sensor VCC, Capacitive Soil Moisture Sensor V1.2 VCC
• 3V3 connected to SD SDHC 3V3
• D15 connected to Soil Temperature Sensor SDA
• D2 connected to Soil Temperature Sensor SCK
• D4 connected to Capacitive Soil Moisture Sensor V1.2 AOUT

SD SDHC

• CS connected to ESP32 D32
• MOSI connected to ESP32 D33
• CLK connected to ESP32 D25
• MISO connected to ESP32 D26
• GND connected to ESP32 GND
• 3V3 connected to ESP32 3V3

BH1750

• SCL connected to ESP32 D27
• SDA connected to ESP32 D14
• GND connected to ESP32 GND
• VCC connected to ESP32 VIN

NPK Sensor

• A connected to ESP32 D12
• B connected to ESP32 D13
• GND connected to ESP32 GND
• VCC connected to ESP32 VIN

Soil Temperature Sensor

• SDA connected to ESP32 D15
• SCK connected to ESP32 D2
• GND connected to ESP32 GND
• VCC connected to ESP32 VIN

Capacitive Soil Moisture Sensor V1.2

• AOUT connected to ESP32 D4
• GND connected to ESP32 GND
• VCC connected to ESP32 VIN

Documented Code

ESP32 Code

void setup() {
  // put your setup code here, to run once:

}

void loop() {
  // put your main code here, to run repeatedly:

}

BH1750 Code

void setup() {
  // put your setup code here, to run once:

}

void loop() {
  // put your main code here, to run repeatedly:

}

This documentation provides a comprehensive overview of the circuit, including the components used, their wiring, and the code for the microcontrollers.