Circuit Documentation

Summary

This circuit involves an Arduino Nano microcontroller interfacing with various sensors and modules, including temperature sensors (DS18B20), flame sensors (KY-026), a gas sensor (MQ-5), a water level sensor, a buzzer module, and multiple LEDs. Additionally, it includes an ESP-01 module for Wi-Fi communication and TM1637 modules for display purposes. The Arduino Nano is programmed to read sensor data, control LEDs, and display information on the TM1637 modules.

Component List

1. Arduino Nano

   • Description: A small, complete, and breadboard-friendly board based on the ATmega328P.
   • Pins: D1/TX, D0/RX, RESET, GND, D2, D3, D4, D5, D6, D7, D8, D9, D10, D11/MOSI, D12/MISO, VIN, 5V, A7, A6, A5, A4, A3, A2, A1, A0, AREF, 3V3, D13/SCK

2. TM1637

   • Description: A 4-digit 7-segment display module.
   • Pins: CLK, DIO, VCC, GND

3. DS18B20 Module

   • Description: A digital temperature sensor.
   • Pins: VCC, DQ, GND

4. KY-026 Flame Sensor

   • Description: A flame sensor module.
   • Pins: A0, GND, VCC, D0

5. LED: Two Pin (red)

   • Description: A standard red LED.
   • Pins: cathode, anode

6. MQ-5

   • Description: A gas sensor module.
   • Pins: VCC, GND, Digi Out, Analog out

7. Non-contact Water Level Sensor

   • Description: A sensor to detect water levels without direct contact.
   • Pins: VCC, GND, SIG

8. Buzzer Module

   • Description: A module to produce sound.
   • Pins: GND, Vcc, I/O

9. ESP-01

   • Description: A Wi-Fi module based on the ESP8266.
   • Pins: GND, GPIO02, GPIO0, RX, VCC, RST, CH_PD, TX

Wiring Details

Arduino Nano

• D1/TX: Connected to ESP-01 RX
• D0/RX: Connected to ESP-01 TX
• D2: Connected to DS18B20 Module DQ
• D3: Connected to LED anode
• D4: Connected to LED anode
• D5: Connected to LED anode
• D6: Connected to LED anode
• D7: Connected to ESP-01 RST
• D8: Connected to ESP-01 CH_PD
• D9: Connected to Buzzer Module I/O
• D10: Connected to MQ-5 Digi Out
• D11/MOSI: Connected to Non-contact Water Level Sensor SIG
• D12/MISO: Connected to Non-contact Water Level Sensor SIG
• D13/SCK: Connected to LED anode
• A7: Connected to KY-026 Flame Sensor A0
• A6: Connected to KY-026 Flame Sensor A0
• A5: Connected to TM1637 DIO
• A4: Connected to TM1637 CLK
• A3: Connected to TM1637 DIO
• A2: Connected to TM1637 CLK
• A1: Connected to TM1637 DIO
• A0: Connected to TM1637 CLK
• 5V: Connected to VCC of all sensors and modules
• GND: Connected to GND of all sensors and modules

TM1637

• CLK: Connected to Arduino Nano A4, A2, A0
• DIO: Connected to Arduino Nano A5, A3, A1
• VCC: Connected to Arduino Nano 5V
• GND: Connected to Arduino Nano GND

DS18B20 Module

• VCC: Connected to Arduino Nano 5V
• DQ: Connected to Arduino Nano D2
• GND: Connected to Arduino Nano GND

KY-026 Flame Sensor

• A0: Connected to Arduino Nano A7, A6
• GND: Connected to Arduino Nano GND
• VCC: Connected to Arduino Nano 5V

LED: Two Pin (red)

• anode: Connected to Arduino Nano D3, D4, D5, D6, D13/SCK
• cathode: Connected to Arduino Nano GND

MQ-5

• VCC: Connected to Arduino Nano 5V
• GND: Connected to Arduino Nano GND
• Digi Out: Connected to Arduino Nano D10

Non-contact Water Level Sensor

• VCC: Connected to Arduino Nano 5V
• GND: Connected to Arduino Nano GND
• SIG: Connected to Arduino Nano D11/MOSI, D12/MISO

Buzzer Module

• GND: Connected to Arduino Nano GND
• Vcc: Connected to Arduino Nano 5V
• I/O: Connected to Arduino Nano D9

ESP-01

• GND: Connected to Arduino Nano GND
• RX: Connected to Arduino Nano D1/TX
• TX: Connected to Arduino Nano D0/RX
• VCC: Connected to Arduino Nano 5V
• RST: Connected to Arduino Nano D7
• CH_PD: Connected to Arduino Nano D8

Code Documentation

Arduino Nano Code

int x = 1234;

#include "TM1637.h"
TM1637 tm1637(2,3);

void setup() {
  tm1637.init();
  tm1637.set(BRIGHT_TYPICAL);
}

void loop() {
    x = x + 1;
    tm1637.point(POINT_ON);
    tm1637.display(x);
    delay(500);
    tm1637.point(POINT_OFF);
    tm1637.display(x);
    delay(500);
}

• Libraries Used: TM1637.h
• Initialization: The TM1637 display is initialized and set to typical brightness in the setup() function.
• Main Loop: In the loop() function, a counter x is incremented, and its value is displayed on the TM1637 display. The display's decimal point is toggled on and off with a 500ms delay between each state.

This documentation provides a comprehensive overview of the circuit, including a summary, detailed component list, wiring details, and code documentation.