Circuit Documentation

Summary

This document provides a detailed overview of a circuit that includes a pH meter, an ESP32 microcontroller, a DS18B20 temperature sensor, and two HC-SR04 ultrasonic sensors. The ESP32 microcontroller serves as the central unit, interfacing with all other components to gather data and perform necessary operations.

Component List

1. PH Meter

   • Pins: Signal, VCC, GND
   • Description: Measures the pH level of a solution.
   • Purpose in Circuit: Provides pH level data to the ESP32.

2. ESP32 38 PINS

   • Pins: GND, G23, G22, TXD, RXD, G21, G19, G18, G5, G17, G16, G4, G0, G2, G15, SDI, SD0, CLK, 3V3, EN, SP, SN, G34, G35, G32, 33, G25, G26, G27, G14, G12, G13, SD2, SD3, 5V
   • Description: A versatile microcontroller with Wi-Fi and Bluetooth capabilities.
   • Purpose in Circuit: Acts as the central processing unit, interfacing with all sensors and peripherals.

3. DS18B20

   • Pins: signal, GND, vcc
   • Description: A digital temperature sensor.
   • Purpose in Circuit: Measures temperature and sends data to the ESP32.

4. HC-SR04 Ultrasonic Sensor

   • Pins: VCC, TRIG, ECHO, GND
   • Description: Measures distance using ultrasonic waves.
   • Purpose in Circuit: Provides distance measurements to the ESP32.

5. HC-SR04 Ultrasonic Distance Sensor (Wokwi Compatible)

   • Pins: VCC, TRIG, ECHO, GND
   • Description: Another variant of the HC-SR04 ultrasonic sensor.
   • Purpose in Circuit: Provides distance measurements to the ESP32.

Wiring Details

PH Meter

• Signal connected to G34 of ESP32 38 PINS
• VCC connected to 3V3 of ESP32 38 PINS
• GND connected to GND of ESP32 38 PINS

ESP32 38 PINS

• G34 connected to Signal of PH Meter
• 3V3 connected to VCC of PH Meter, VCC of HC-SR04 Ultrasonic Sensor, vcc of DS18B20, VCC of HC-SR04 Ultrasonic Distance Sensor (Wokwi Compatible)
• GND connected to GND of PH Meter, GND of HC-SR04 Ultrasonic Distance Sensor (Wokwi Compatible), GND of HC-SR04 Ultrasonic Sensor, GND of DS18B20
• G17 connected to ECHO of HC-SR04 Ultrasonic Distance Sensor (Wokwi Compatible)
• G16 connected to TRIG of HC-SR04 Ultrasonic Distance Sensor (Wokwi Compatible)
• G4 connected to signal of DS18B20
• G25 connected to TRIG of HC-SR04 Ultrasonic Sensor
• G26 connected to ECHO of HC-SR04 Ultrasonic Sensor

DS18B20

• signal connected to G4 of ESP32 38 PINS
• vcc connected to 3V3 of ESP32 38 PINS
• GND connected to GND of ESP32 38 PINS

HC-SR04 Ultrasonic Sensor

• VCC connected to 3V3 of ESP32 38 PINS
• TRIG connected to G25 of ESP32 38 PINS
• ECHO connected to G26 of ESP32 38 PINS
• GND connected to GND of ESP32 38 PINS

HC-SR04 Ultrasonic Distance Sensor (Wokwi Compatible)

• VCC connected to 3V3 of ESP32 38 PINS
• TRIG connected to G16 of ESP32 38 PINS
• ECHO connected to G17 of ESP32 38 PINS
• GND connected to GND of ESP32 38 PINS

Code

No code is provided for this circuit.