Circuit Documentation

Summary

This document provides a detailed overview of a circuit that includes a Raspberry Pi Pico microcontroller, a BMP280 sensor, a DHT22 sensor, a Photoresistor (LDR) sensor, and a 3.7V battery. The circuit is designed to read environmental data such as temperature, humidity, and light intensity.

Component List

Raspberry Pi Pico

• Description: A low-cost, high-performance microcontroller board with flexible digital interfaces.
• Pins: 43 pins including GPIO, power, and ground pins.

Photoresistor (LDR) Sensor (Wokwi Compatible)

• Description: A light-dependent resistor that changes its resistance based on the light intensity.
• Pins: VCC, GND, DO, AO

BMP280

• Description: A barometric pressure sensor that can measure temperature and pressure.
• Pins: SDO, CSB, SDA, SCL, GND, VCC

DHT22

• Description: A digital temperature and humidity sensor.
• Pins: +, Out, -

3.7V Battery

• Description: A rechargeable lithium-ion battery.
• Pins: +, -

Wiring Details

Raspberry Pi Pico

• pin 1 connected to BMP280 SDA
• pin 2 connected to BMP280 SCL
• pin 5 connected to DHT22 Out
• pin 34 connected to Photoresistor (LDR) Sensor AO
• pin 36 connected to 3.7V Battery +, DHT22 +, BMP280 VCC, Photoresistor (LDR) Sensor VCC
• pin 38 connected to 3.7V Battery -, DHT22 -, BMP280 GND, Photoresistor (LDR) Sensor GND

Photoresistor (LDR) Sensor (Wokwi Compatible)

• VCC connected to Raspberry Pi Pico pin 36
• GND connected to Raspberry Pi Pico pin 38
• AO connected to Raspberry Pi Pico pin 34

BMP280

• SDA connected to Raspberry Pi Pico pin 1
• SCL connected to Raspberry Pi Pico pin 2
• GND connected to Raspberry Pi Pico pin 38
• VCC connected to Raspberry Pi Pico pin 36

DHT22

• + connected to Raspberry Pi Pico pin 36
• Out connected to Raspberry Pi Pico pin 5
• - connected to Raspberry Pi Pico pin 38

3.7V Battery

• + connected to Raspberry Pi Pico pin 36
• - connected to Raspberry Pi Pico pin 38

Code

sketch.ino

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

}

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

}

documentation.txt

This document provides a comprehensive overview of the circuit, including a summary, component list, wiring details, and the code used in the microcontroller.