Circuit Documentation

Summary

This document provides a detailed overview of a circuit designed using an ESP8266 NodeMCU microcontroller, a Water Level Sensor, a PH Meter, and a DHT22 sensor. The circuit is intended to monitor environmental parameters such as water level, pH, and temperature/humidity.

Component List

1. ESP8266 NodeMCU

   • Description: A low-cost Wi-Fi microcontroller with GPIO, ADC, and other interfaces.
   • Pins: D0, D1, D2, D3, D4, 3V3, GND, D5, D6, D7, D8, RX, TX, A0, RSV, SD3, SD2, SD1, CMD, SD0, CLK, EN, RST, VIN

2. Water Level Sensor

   • Description: A sensor used to detect the level of water.
   • Pins: SIG, VCC, GND

3. PH Meter

   • Description: A sensor used to measure the pH level of a solution.
   • Pins: Signal, VCC, GND

4. DHT22

   • Description: A sensor used to measure temperature and humidity.
   • Pins: +, Out, -

Wiring Details

ESP8266 NodeMCU

• D3: Connected to Water Level Sensor SIG
• D4: Connected to DHT22 Out
• 3V3: Connected to DHT22 + and Water Level Sensor VCC
• GND: Connected to DHT22 -, Water Level Sensor GND, and PH Meter GND
• A0: Connected to PH Meter Signal
• VIN: Connected to PH Meter VCC

Water Level Sensor

• SIG: Connected to ESP8266 NodeMCU D3
• VCC: Connected to ESP8266 NodeMCU 3V3
• GND: Connected to ESP8266 NodeMCU GND

PH Meter

• Signal: Connected to ESP8266 NodeMCU A0
• VCC: Connected to ESP8266 NodeMCU VIN
• GND: Connected to ESP8266 NodeMCU GND

DHT22

• Out: Connected to ESP8266 NodeMCU D4
• +: Connected to ESP8266 NodeMCU 3V3
• -: Connected to ESP8266 NodeMCU GND

Code

No code is provided for this circuit.

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This document provides a comprehensive overview of the circuit, including a summary, component list, wiring details, and code section. The wiring details ensure that each component is correctly connected to the ESP8266 NodeMCU, facilitating the monitoring of water level, pH, and temperature/humidity.