Circuit Documentation

Summary

This circuit is designed to interface various sensors and actuators with an ESP32 Devkit V1 microcontroller. The sensors include a DHT22 temperature and humidity sensor, a YL-69 soil moisture sensor, and two PH meters. Actuators in the circuit are two plastic solenoid valves controlled via a 2-channel relay module. The ESP32 Devkit V1 serves as the central processing unit, reading sensor data and controlling the solenoid valves based on predefined conditions. The circuit is powered by the 3V3 output from the ESP32, which also provides ground connections to the various components.

Component List

DHT22

• Temperature and Humidity Sensor
• Pins: +, Out, -

Plastic Solenoid Valve

• Actuator for controlling fluid flow
• Pins: pin1, pin2

ESP32 Devkit V1

• Microcontroller with WiFi capability
• Pins: 3V3, GND, D15, D2, D4, RX2, TX2, D5, D18, D19, D21, RX0, TX0, D22, D23, EN, VP, VN, D34, D35, D32, D33, D25, D26, D27, D14, D12, D13, VIN

Resistor

• Passive component used to limit current or divide voltages
• Resistance: 10000 Ohms

YL-69 Sonda

• Soil moisture sensor
• Pins: +, -

Kabel

• Wire or cable for making electrical connections

PH Meter

• Sensor for measuring the pH level of a solution
• Pins: Signal, VCC, GND

Soil Moisture Module

• Sensor for detecting the moisture level in soil
• Pins: positive, negative, Analog, Digital, Ground, VCC

Relay Module 2 Channel

• Module for controlling high power devices using low power signals
• Pins: GND, IN1, IN2, VCC, NC1, COM, NO1, NC2, NO2

Wiring Details

DHT22

• + to ESP32 3V3
• Out to ESP32 D23 through a 10k Ohm resistor
• - to ESP32 GND

Plastic Solenoid Valve (1st instance)

• pin1 to Relay Module NO1
• pin2 to Kabel 1 (presumably connected to power supply)

Plastic Solenoid Valve (2nd instance)

• pin1 to Relay Module NO2
• pin2 to Kabel 1 (presumably connected to power supply)

ESP32 Devkit V1

• 3V3 to VCC of DHT22, PH Meters, and Soil Moisture Modules
• GND to GND of DHT22, PH Meters, Relay Module, and Soil Moisture Modules
• D34 to Signal of PH Meter (1st instance)
• D35 to Signal of PH Meter (2nd instance)
• D32 to Analog of Soil Moisture Module (1st instance)
• D33 to Analog of Soil Moisture Module (2nd instance)
• D22 to IN1 of Relay Module
• D21 to IN2 of Relay Module
• VIN to VCC of Relay Module

YL-69 Sonda (1st instance)

• + to positive of Soil Moisture Module (2nd instance)
• - to negative of Soil Moisture Module (2nd instance)

YL-69 Sonda (2nd instance)

• + to positive of Soil Moisture Module (1st instance)
• - to negative of Soil Moisture Module (1st instance)

PH Meter (1st instance)

• Signal to ESP32 D34
• VCC to ESP32 3V3
• GND to ESP32 GND

PH Meter (2nd instance)

• Signal to ESP32 D35
• VCC to ESP32 3V3
• GND to ESP32 GND

Soil Moisture Module (1st instance)

• positive to YL-69 Sonda (2nd instance) +
• negative to YL-69 Sonda (2nd instance) -
• Analog to ESP32 D32
• VCC to ESP32 3V3
• Ground to ESP32 GND

Soil Moisture Module (2nd instance)

• positive to YL-69 Sonda (1st instance) +
• negative to YL-69 Sonda (1st instance) -
• Analog to ESP32 D33
• VCC to ESP32 3V3
• Ground to ESP32 GND

Relay Module 2 Channel

• GND to ESP32 GND
• IN1 to ESP32 D22
• IN2 to ESP32 D21
• VCC to ESP32 VIN
• NO1 to Plastic Solenoid Valve (1st instance) pin1
• NO2 to Plastic Solenoid Valve (2nd instance) pin1
• COM to Kabel 1 (presumably connected to power supply)

Documented Code

No code was provided for the microcontroller. The expected functionality would include reading sensor data from the DHT22, PH Meters, and Soil Moisture Modules, and controlling the solenoid valves via the relay module based on sensor inputs and programmed logic. The code would likely involve initializing the sensors, reading their outputs, and using digital outputs to control the relay module.