Circuit Documentation

Summary

This circuit is designed to interface an ESP32C3 microcontroller with three sensors: AHT10, BMP180, and KY-015 DHT11. The ESP32C3 reads temperature, humidity, and pressure data from these sensors and outputs the data to the serial port.

Component List

1. ESP32C3 Supermini

   • Description: A powerful microcontroller with Wi-Fi and Bluetooth capabilities.
   • Pins: GPIO05, GPIO06, GPIO07, GPIO08, GPIO09, GPIO10, GPIO20, GPIO21, GPIO00, GPIO01, GPIO02, GPIO03, GPIO04, 3.3V, GND, +5V

2. AHT10

   • Description: A temperature and humidity sensor.
   • Pins: Vcc, Gnd, SCL, SDA

3. BMP180

   • Description: A barometric pressure sensor.
   • Pins: 3.3, SDA, SCL, GND, VCC

4. KY-015 DHT11 Temperature-Humidity sensor module

   • Description: A basic temperature and humidity sensor.
   • Pins: VCC, GND, DOUT

Wiring Details

ESP32C3 Supermini

• GPIO05: Connected to KY-015 DHT11 Temperature-Humidity sensor module (DOUT)
• GPIO08: Connected to AHT10 (SDA) and BMP180 (SDA)
• GPIO09: Connected to AHT10 (SCL) and BMP180 (SCL)
• 3.3V: Connected to AHT10 (Vcc) and BMP180 (VCC)
• GND: Connected to AHT10 (Gnd), KY-015 DHT11 Temperature-Humidity sensor module (GND), and BMP180 (GND)
• +5V: Connected to KY-015 DHT11 Temperature-Humidity sensor module (VCC)

AHT10

• Vcc: Connected to ESP32C3 Supermini (3.3V)
• Gnd: Connected to ESP32C3 Supermini (GND)
• SCL: Connected to ESP32C3 Supermini (GPIO09)
• SDA: Connected to ESP32C3 Supermini (GPIO08)

BMP180

• VCC: Connected to ESP32C3 Supermini (3.3V)
• GND: Connected to ESP32C3 Supermini (GND)
• SCL: Connected to ESP32C3 Supermini (GPIO09)
• SDA: Connected to ESP32C3 Supermini (GPIO08)

KY-015 DHT11 Temperature-Humidity sensor module

• VCC: Connected to ESP32C3 Supermini (+5V)
• GND: Connected to ESP32C3 Supermini (GND)
• DOUT: Connected to ESP32C3 Supermini (GPIO05)

Code Documentation

/*
 * This Arduino Sketch initializes BMP180, AHT10, and KY-015 DHT11 sensors.
 * It reads temperature, humidity, and pressure data from these sensors and
 * outputs the data to the serial port.
 */

#include <Wire.h>
#include <Adafruit_Sensor.h>
#include <Adafruit_BMP085_U.h>
#include <DHT.h>
#include <DHT_U.h>
#include <AHT10.h>

#define DHTPIN 5
#define DHTTYPE DHT11
#define AHT10_SDA 8
#define AHT10_SCL 9

DHT dht(DHTPIN, DHTTYPE);
Adafruit_BMP085_Unified bmp = Adafruit_BMP085_Unified(10085);
AHT10 aht10(AHT10_SDA, AHT10_SCL);

void setup() {
  Serial.begin(9600);
  Wire.begin();

  if (!bmp.begin()) {
    Serial.print("Could not find a valid BMP180 sensor, check wiring!");
    while (1);
  }

  dht.begin();
  aht10.begin();
}

void loop() {
  sensors_event_t event;
  bmp.getEvent(&event);

  if (event.pressure) {
    Serial.print("Pressure: ");
    Serial.print(event.pressure);
    Serial.println(" hPa");
  }

  float temperature = dht.readTemperature();
  float humidity = dht.readHumidity();

  if (isnan(temperature) || isnan(humidity)) {
    Serial.println("Failed to read from DHT sensor!");
  } else {
    Serial.print("DHT Temperature: ");
    Serial.print(temperature);
    Serial.println(" *C");
    Serial.print("DHT Humidity: ");
    Serial.print(humidity);
    Serial.println(" %");
  }

  temperature = aht10.readTemperature();
  humidity = aht10.readHumidity();

  if (isnan(temperature) || isnan(humidity)) {
    Serial.println("Failed to read from AHT10 sensor!");
  } else {
    Serial.print("AHT10 Temperature: ");
    Serial.print(temperature);
    Serial.println(" *C");
    Serial.print("AHT10 Humidity: ");
    Serial.print(humidity);
    Serial.println(" %");
  }

  delay(2000);
}

This code initializes the BMP180, AHT10, and KY-015 DHT11 sensors, reads temperature, humidity, and pressure data from these sensors, and outputs the data to the serial port.