Circuit Documentation

Summary

This document provides a detailed overview of a circuit that includes an ESP8266 NodeMCU, an Arduino 101, various sensors, and a Bi-Directional Logic Level Converter. The circuit is designed to interface multiple sensors with the microcontrollers, enabling data acquisition and processing.

Component List

1. ESP8266 NodeMCU

   • Description: A low-cost Wi-Fi microcontroller with GPIO, ADC, and UART 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. pH Meter V1.1

   • Description: A sensor module for measuring the pH level of a solution.
   • Pins: DATA, VCC, GND

3. Bi-Directional Logic Level Converter

   • Description: A module for converting voltage levels between different logic families.
   • Pins: HV1, HV2, HV, GND, HV3, HV4, LV1, LV2, LV, LV3, LV4

4. TDS Sensor Module

   • Description: A sensor module for measuring the Total Dissolved Solids (TDS) in water.
   • Pins: TDS Negative, TDS Positive, TDS A

5. Gravity: I2C ADS1115 16-Bit ADC Module

   • Description: An analog-to-digital converter module with I2C interface.
   • Pins: VCC, GND, SCL, SDA, A0_VCC, A1_VCC, A2_VCC, A3_VCC, A0_A, A1_A, A2_A, A3_A

6. Arduino 101

   • Description: A microcontroller board based on the Intel Curie module.
   • Pins: A5/SCL, A4/SDA, AREF, GND, D13/SCK, D12/MISO, D11 PWM/MOSI, D10 PWM/SS, D9 PWM, D8, D7, D6 PWM, D5 PWM, D4, D3 PWM, D2, D1/TX, D0/RX, AIN, ioref, RESET, 3V3, 5V, VIN, A0, A1, A2, A3, ICSP MISO, ICSP SCK, ICSP MOSI

7. Turbidity Sensor

   • Description: A sensor module for measuring the turbidity (cloudiness) of water.
   • Pins: GND, VCC, NC, SIG

Wiring Details

ESP8266 NodeMCU

• GND is connected to:

  • TDS Sensor Module (TDS Negative)
  • Turbidity Sensor (GND)
  • Gravity: I2C ADS1115 16-Bit ADC Module (GND)
  • Bi-Directional Logic Level Converter (GND)
  • pH Meter V1.1 (GND)
  • Arduino 101 (GND)

• TX is connected to:

  • Bi-Directional Logic Level Converter (LV3)

• RX is connected to:

  • Bi-Directional Logic Level Converter (LV4)

• VIN is connected to:

  • TDS Sensor Module (TDS Positive)
  • Turbidity Sensor (VCC)
  • Gravity: I2C ADS1115 16-Bit ADC Module (VCC)
  • Arduino 101 (VIN)
  • Bi-Directional Logic Level Converter (LV)
  • Bi-Directional Logic Level Converter (HV)
  • pH Meter V1.1 (VCC)

pH Meter V1.1

• DATA is connected to:

  • Arduino 101 (A0)

• VCC is connected to:

  • ESP8266 NodeMCU (VIN)

• GND is connected to:

  • ESP8266 NodeMCU (GND)

Bi-Directional Logic Level Converter

• LV3 is connected to:

  • ESP8266 NodeMCU (TX)

• LV4 is connected to:

  • ESP8266 NodeMCU (RX)

• HV1 is connected to:

  • Arduino 101 (5V)

• HV3 is connected to:

  • Arduino 101 (D1/TX)

• HV4 is connected to:

  • Arduino 101 (D0/RX)

• LV1 is connected to:

  • Arduino 101 (3V3)

• GND is connected to:

  • ESP8266 NodeMCU (GND)

• LV is connected to:

  • ESP8266 NodeMCU (VIN)

• HV is connected to:

  • ESP8266 NodeMCU (VIN)

TDS Sensor Module

• TDS Negative is connected to:

  • ESP8266 NodeMCU (GND)

• TDS Positive is connected to:

  • ESP8266 NodeMCU (VIN)

• TDS A is connected to:

  • Arduino 101 (A1)

Gravity: I2C ADS1115 16-Bit ADC Module

• VCC is connected to:

  • ESP8266 NodeMCU (VIN)

• GND is connected to:

  • ESP8266 NodeMCU (GND)

• SDA is connected to:

  • Arduino 101 (A4/SDA)

• SCL is connected to:

  • Arduino 101 (A5/SCL)

Arduino 101

• A0 is connected to:

  • pH Meter V1.1 (DATA)

• A1 is connected to:

  • TDS Sensor Module (TDS A)

• A2 is connected to:

  • Turbidity Sensor (SIG)

• A4/SDA is connected to:

  • Gravity: I2C ADS1115 16-Bit ADC Module (SDA)

• A5/SCL is connected to:

  • Gravity: I2C ADS1115 16-Bit ADC Module (SCL)

• D0/RX is connected to:

  • Bi-Directional Logic Level Converter (HV4)

• D1/TX is connected to:

  • Bi-Directional Logic Level Converter (HV3)

• 3V3 is connected to:

  • Bi-Directional Logic Level Converter (LV1)

• 5V is connected to:

  • Bi-Directional Logic Level Converter (HV1)

• VIN is connected to:

  • ESP8266 NodeMCU (VIN)

• GND is connected to:

  • ESP8266 NodeMCU (GND)

Turbidity Sensor

• GND is connected to:

  • ESP8266 NodeMCU (GND)

• VCC is connected to:

  • ESP8266 NodeMCU (VIN)

• SIG is connected to:

  • Arduino 101 (A2)

Code

No code is provided for this circuit.

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This document provides a comprehensive overview of the circuit, including the components used, their connections, and the wiring details. This should serve as a useful reference for understanding and replicating the circuit.