Circuit Documentation

Summary

This circuit is designed using an ESP32 microcontroller to interface with a DHT11 temperature and humidity sensor, a BH1750 light sensor, and a 16x2 I2C LCD display. The ESP32 collects data from the sensors and displays the information on the LCD screen. The communication between the ESP32 and the sensors is facilitated through I2C and GPIO connections.

Component List

1. ESP32 38 PINS

   • Description: A powerful microcontroller with built-in Wi-Fi and Bluetooth capabilities.
   • Pins: GND, 23, 22/SCL, 1, 2, 21/SDA, 19, 18, 5, 17/TX2, 16/RX2, 4, 0, 15, D1, D0, CLK, 3V3, EN, VP, VN, 34, 35, 32, 33, 25, 26, 27, 14, 12, 13, D2, D3, 11, 5V/VIN

2. DHT11

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

3. BH1750

   • Description: A digital light sensor that communicates via I2C.
   • Pins: VCC, GND, SCL, SDA, ADDR

4. 16x2 I2C LCD

   • Description: A 16x2 character LCD display with I2C interface.
   • Pins: GND, VCC, SDA, SCL

Wiring Details

ESP32 38 PINS

• GND: Connected to GND of BH1750, DHT11, and 16x2 I2C LCD.
• 22/SCL: Connected to SCL of BH1750 and 16x2 I2C LCD.
• 21/SDA: Connected to SDA of BH1750 and 16x2 I2C LCD.
• 18: Connected to DATA of DHT11.
• 5V/VIN: Connected to VCC of BH1750, DHT11, and 16x2 I2C LCD.

DHT11

• DATA: Connected to pin 18 of ESP32.
• GND: Connected to GND of ESP32.
• VCC: Connected to 5V/VIN of ESP32.

BH1750

• VCC: Connected to 5V/VIN of ESP32.
• GND: Connected to GND of ESP32.
• SCL: Connected to 22/SCL of ESP32.
• SDA: Connected to 21/SDA of ESP32.
• ADDR: Not connected.

16x2 I2C LCD

• GND: Connected to GND of ESP32.
• VCC: Connected to 5V/VIN of ESP32.
• SDA: Connected to 21/SDA of ESP32.
• SCL: Connected to 22/SCL of ESP32.

Code

No code is provided for this circuit.