Circuit Documentation

Summary

This document provides a detailed overview of a circuit designed to interface various sensors, actuators, and modules with microcontrollers. The circuit includes an HC-SR04 Ultrasonic Sensor, a KY-015 DHT11 temperature and humidity sensor, a Servomotor SG90, a DFPlayer MINI MP3 module, a YL-69 soil moisture sensor, an ESP8266 NodeMCU Wi-Fi module, an Arduino UNO, a resistance voltage conversion module, a loudspeaker, a solar charger power bank, a Li-ion 18650 battery, and a solar power manager. The circuit is designed to collect environmental data, control a servomotor, play audio files, and manage power from solar energy.

Component List

HC-SR04 Ultrasonic Sensor

• Pins: VCC, TRIG, ECHO, GND
• Description: A sensor for measuring distance using ultrasonic waves.

KY-015 DHT11 Temperature and Humidity Sensor

• Pins: 5V, S, GND
• Description: A sensor for measuring ambient temperature and humidity.

Servomotor SG90

• Pins: SIG, VCC, GND
• Description: A small and lightweight servo for precise control of motion.

DFPlayer MINI MP3 Module

• Pins: VCC, BUSY, RX, USB -, TX, USB +, DAC_R, K2/ADC_KEY, DAC_L, K1/ADC_KEY, SPK1, IO 2, GND, SPK2, IO 1
• Description: A compact audio player module for playing MP3 files.

YL-69 Soil Moisture Sensor

• Pins: +, -
• Description: A sensor for detecting the moisture content in soil.

ESP8266 NodeMCU Wi-Fi Module

• Pins: D0, D1, D2, D3, D4, 3V3, GND, D5, D6, D7, D8, RX, TX, A0, RSV, SD3, SD2, SD1, CMD, SD0, CLK, EN, RST, VIN
• Description: A Wi-Fi module with integrated microcontroller for IoT applications.

Arduino UNO

• Pins: UNUSED, IOREF, Reset, 3.3V, 5V, GND, Vin, A0, A1, A2, A3, A4, A5, SCL, SDA, AREF, D13, D12, D11, D10, D9, D8, D7, D6, D5, D4, D3, D2, D1, D0
• Description: A microcontroller board based on the ATmega328P for building digital devices and interactive objects.

Resistance Voltage Conversion Module

• Pins: V, gnd, a0, vcc, d0, Gnd
• Description: A module for converting a resistance change to a voltage change, often used with sensors.

Loudspeaker

• Pins: pin1, pin2
• Description: An electroacoustic transducer for producing sound.

Solar Charger Power Bank

• Pins: +, -
• Description: A device for storing electrical energy from solar panels.

Li-ion 18650 Battery

• Pins: -, +
• Description: A rechargeable battery commonly used in portable electronics.

Solar Power Manager

• Pins: vcc, Gnd
• Description: A module for managing the charging and discharging of batteries using solar power.

Wiring Details

HC-SR04 Ultrasonic Sensor

• VCC: Connected to 5V power supply from Arduino UNO.
• TRIG: Connected to digital pin D9 on Arduino UNO.
• ECHO: Connected to digital pin D8 on Arduino UNO.
• GND: Connected to ground.

KY-015 DHT11 Temperature and Humidity Sensor

• 5V: Connected to 3V3 power supply from ESP8266 NodeMCU.
• S: Connected to digital pin D1 on ESP8266 NodeMCU.
• GND: Connected to ground.

Servomotor SG90

• SIG: Connected to digital pin D7 on Arduino UNO.
• VCC: Connected to 5V power supply from Arduino UNO.
• GND: Connected to ground.

DFPlayer MINI MP3 Module

• VCC: Connected to 5V power supply from Arduino UNO.
• GND: Connected to ground.
• IO 2: Connected to pin1 on Loudspeaker.

YL-69 Soil Moisture Sensor

• +: Connected to V on resistance voltage conversion module.
• -: Connected to gnd on resistance voltage conversion module.

ESP8266 NodeMCU Wi-Fi Module

• 3V3: Connected to 5V power supply from KY-015 DHT11 and vcc on resistance voltage conversion module.
• A0: Connected to a0 on resistance voltage conversion module.
• GND: Connected to ground and Gnd on resistance voltage conversion module.

Loudspeaker

• pin1: Connected to IO 2 on DFPlayer MINI MP3 Module.
• pin2: Connected to ground.

Solar Charger Power Bank

• +: Connected to vcc on solar power manager.
• -: Connected to Gnd on solar power manager.

Li-ion 18650 Battery

• -: Connected to Gnd on solar power manager.
• +: Connected to vcc on solar power manager.

Documented Code

Arduino UNO Code (sketch.ino)

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

}

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

}

Note: The provided code for the Arduino UNO is a template and does not contain any functional code. It is expected that the user will fill in the setup and loop functions with the desired behavior for the circuit.