Circuit Documentation

Summary

This circuit is designed to interface an ESP-8266 microcontroller with a DS18B20 temperature sensor, a Heart Pulse Sensor, and an I2C LCD 16x2 screen. The ESP-8266 collects data from the sensors and displays the information on the LCD screen. The circuit is powered through the ESP-8266's Vin pin, which distributes power to the other components.

Component List

1. ESP-8266 Controller

   • Description: A Wi-Fi enabled microcontroller used for collecting sensor data and displaying it on an LCD screen.
   • Pins: A0, RSV, SD3, SD5, SD1, CMD, D0, D1, D2, D3, D4, 3V3, GND, D5, D6, SD0, CLK, RST, EN, D7, D8, RX, TX, Vin, 5V

2. DS18B20

   • Description: A digital temperature sensor.
   • Pins: signal, GND, vcc

3. I2C LCD 16x2 Screen

   • Description: A 16x2 character LCD screen with I2C interface.
   • Pins: SCL, SDA, VCC (5V), GND, VDD, VO, RS, RW, E, D0, D1, D2, D3, D4, D5, D6, D7, BLA, BLK

4. Heart Pulse Sensor

   • Description: A sensor used to measure heart pulse rate.
   • Pins: GND, VCC, SIGNAL

Wiring Details

ESP-8266 Controller

• A0: Connected to Heart Pulse Sensor SIGNAL
• D1: Connected to I2C LCD 16x2 Screen SCL
• D2: Connected to DS18B20 signal
• D3: Connected to I2C LCD 16x2 Screen SDA
• GND: Connected to DS18B20 GND, I2C LCD 16x2 Screen GND, Heart Pulse Sensor GND
• Vin: Connected to DS18B20 vcc, I2C LCD 16x2 Screen VCC (5V), Heart Pulse Sensor VCC

DS18B20

• signal: Connected to ESP-8266 Controller D2
• GND: Connected to ESP-8266 Controller GND
• vcc: Connected to ESP-8266 Controller Vin

I2C LCD 16x2 Screen

• SCL: Connected to ESP-8266 Controller D1
• SDA: Connected to ESP-8266 Controller D3
• GND: Connected to ESP-8266 Controller GND
• VCC (5V): Connected to ESP-8266 Controller Vin

Heart Pulse Sensor

• SIGNAL: Connected to ESP-8266 Controller A0
• GND: Connected to ESP-8266 Controller GND
• VCC: Connected to ESP-8266 Controller Vin

Code

No code is provided for this circuit.