Circuit Documentation

Summary

This document provides a detailed overview of a circuit that integrates various sensors and components with an ESP32 microcontroller. The circuit includes an ultrasonic sensor, a pressure sensor, a DHT11 temperature and humidity sensor, a water flow sensor, a load cell, an HX711 bridge sensor interface, and a buzzer. The ESP32 microcontroller serves as the central unit, interfacing with all the sensors and components to collect data and perform actions.

Component List

1. ESP32

   • Description: A powerful microcontroller with built-in 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

2. DHT11

   • Description: A basic, low-cost digital temperature and humidity sensor.
   • Pins: DATA, GND, VCC

3. SparkFun Pressure Sensor Breakout - MS5803-14BA

   • Description: A high-resolution pressure sensor.
   • Pins: GND, 3.3V, SDA/SDI, SCL/SCLK, SDO, AD/CS, PS

4. Ultrasonic Sensor

   • Description: A sensor used to measure distance by using ultrasonic waves.
   • Pins: +VCC, Trigger, Echo, GND

5. Buzzer

   • Description: An audio signaling device.
   • Pins: PIN, GND

6. Load Cell - Red/white/black/green

   • Description: A sensor used to measure weight or force.
   • Pins: E+, A-, E-, A+

7. Water Flow Sensor

   • Description: A sensor used to measure the flow rate of water.
   • Pins: Signal, Vcc, GND

8. HX711 - Bridge Sensor Interface

   • Description: An interface for bridge sensors like load cells.
   • Pins: E+, E-, A-, A+, B-, B+, GND - GROUND, DATA (OUT), SCK - CLOCK (IN), 3.3/3.5V Supply

Wiring Details

ESP32

• GND is connected to:

  • GND of Ultrasonic Sensor
  • GND of SparkFun Pressure Sensor Breakout - MS5803-14BA
  • GND of HX711 - Bridge Sensor Interface
  • GND of Buzzer
  • GND of Water Flow Sensor
  • GND of DHT11

• VIN is connected to:

  • +VCC of Ultrasonic Sensor

• 3V3 is connected to:

  • 3.3V of SparkFun Pressure Sensor Breakout - MS5803-14BA
  • 3.3/3.5V Supply of HX711 - Bridge Sensor Interface
  • Vcc of Water Flow Sensor
  • VCC of DHT11

• D33 is connected to:

  • Trigger of Ultrasonic Sensor

• D26 is connected to:

  • Echo of Ultrasonic Sensor

• D15 is connected to:

  • DATA (OUT) of HX711 - Bridge Sensor Interface

• D2 is connected to:

  • Signal of Water Flow Sensor

• D4 is connected to:

  • SCK - CLOCK (IN) of HX711 - Bridge Sensor Interface

• D5 is connected to:

  • PIN of Buzzer

• D18 is connected to:

  • DATA of DHT11

• D21 is connected to:

  • SDA/SDI of SparkFun Pressure Sensor Breakout - MS5803-14BA

• D22 is connected to:

  • SCL/SCLK of SparkFun Pressure Sensor Breakout - MS5803-14BA

DHT11

• DATA is connected to:

  • D18 of ESP32

• GND is connected to:

  • GND of ESP32

• VCC is connected to:

  • 3V3 of ESP32

SparkFun Pressure Sensor Breakout - MS5803-14BA

• GND is connected to:

  • GND of ESP32

• 3.3V is connected to:

  • 3V3 of ESP32

• SDA/SDI is connected to:

  • D21 of ESP32

• SCL/SCLK is connected to:

  • D22 of ESP32

Ultrasonic Sensor

• +VCC is connected to:

  • VIN of ESP32

• Trigger is connected to:

  • D33 of ESP32

• Echo is connected to:

  • D26 of ESP32

• GND is connected to:

  • GND of ESP32

Buzzer

• PIN is connected to:

  • D5 of ESP32

• GND is connected to:

  • GND of ESP32

Load Cell - Red/white/black/green

• E+ is connected to:

  • E+ of HX711 - Bridge Sensor Interface

• A- is connected to:

  • A- of HX711 - Bridge Sensor Interface

• E- is connected to:

  • E- of HX711 - Bridge Sensor Interface

• A+ is connected to:

  • A+ of HX711 - Bridge Sensor Interface

Water Flow Sensor

• Signal is connected to:

  • D2 of ESP32

• Vcc is connected to:

  • 3V3 of ESP32

• GND is connected to:

  • GND of ESP32

HX711 - Bridge Sensor Interface

• E+ is connected to:

  • E+ of Load Cell

• A- is connected to:

  • A- of Load Cell

• E- is connected to:

  • E- of Load Cell

• A+ is connected to:

  • A+ of Load Cell

• GND - GROUND is connected to:

  • GND of ESP32

• DATA (OUT) is connected to:

  • D15 of ESP32

• SCK - CLOCK (IN) is connected to:

  • D4 of ESP32

• 3.3/3.5V Supply is connected to:

  • 3V3 of ESP32

Code

No code is provided for this circuit.

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This document provides a comprehensive overview of the circuit, including a summary, component list, wiring details, and code section. Each component is described, and its connections are detailed to ensure proper assembly and functionality.