Circuit Documentation

Summary

This document provides a detailed overview of a circuit designed to monitor water level, pH, and temperature/humidity using an ESP8266 NodeMCU microcontroller. The circuit includes a Water Level Sensor, a PH Meter, and a DHT22 sensor. The ESP8266 NodeMCU is used to read data from these sensors and potentially transmit the data wirelessly.

Component List

1. Water Level Sensor

   • Pins: SIG, VCC, GND
   • Description: Measures the water level.

2. PH Meter

   • Pins: Signal, VCC, GND
   • Description: Measures the pH level of the water.

3. ESP8266 NodeMCU

   • 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
   • Description: Microcontroller used for reading sensor data and potentially transmitting it wirelessly.

4. DHT22

   • Pins: +, Out, -
   • Description: Measures temperature and humidity.

Wiring Details

Water Level Sensor

• SIG connected to D3 of ESP8266 NodeMCU
• VCC connected to 3V3 of ESP8266 NodeMCU
• GND connected to GND of ESP8266 NodeMCU

PH Meter

• Signal connected to A0 of ESP8266 NodeMCU
• VCC connected to VIN of ESP8266 NodeMCU
• GND connected to GND of ESP8266 NodeMCU

ESP8266 NodeMCU

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

DHT22

• Out connected to D4 of ESP8266 NodeMCU
• + connected to 3V3 of ESP8266 NodeMCU
• - connected to GND of ESP8266 NodeMCU

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 accurate data collection from the sensors.