Circuit Documentation

Summary

The circuit in question is designed around the ESP8266 NodeMCU microcontroller, which serves as the central processing unit. The circuit includes a variety of sensors: the VL53L0X and VL6180X for distance measurement, the BMP180 for pressure and temperature measurement, and a photodiode for light detection. Power regulation is managed by an AMS1117 3.3V voltage regulator, and the system is powered by a LiPoly Battery (1300mAh). The ESP8266 NodeMCU communicates with the sensors via I2C protocol and GPIO connections.

Component List

ESP8266 NodeMCU

• Microcontroller with WiFi capability.
• Provides GPIO pins for interfacing with sensors and other peripherals.
• Operates at 3.3V logic levels.

XP-G2

• A component with unspecified functionality in this context.

VL6180X

• A time-of-flight distance sensor with integrated ambient light sensing.
• Interfaces with the microcontroller via I2C.

Photodiode

• A light-sensitive component used to detect light levels.
• Consists of an anode and cathode for connection.

BMP180

• A digital barometric pressure sensor.
• Also provides temperature readings.
• Interfaces with the microcontroller via I2C.

VL53L0X

• A time-of-flight distance sensor.
• Interfaces with the microcontroller via I2C.

AMS1117 3.3

• A voltage regulator that outputs a stable 3.3V from a higher voltage input.
• Used to regulate power from the LiPoly battery to the microcontroller and sensors.

LiPoly Battery (1300mAh)

• A rechargeable lithium polymer battery.
• Provides power to the circuit.

Wiring Details

ESP8266 NodeMCU

• D1 connected to VL53L0X scl.
• D2 connected to VL53L0X sda.
• D3 connected to BMP180 SCL.
• D4 connected to BMP180 SDA.
• D5 and D6 connected to VL6180X (functionality unspecified).
• 3V3 connected to VL53L0X vin and BMP180 VCC.
• GND connected to VL53L0X gnd, BMP180 GND, and AMS1117 3.3 GND.
• VIN connected to AMS1117 3.3 OUT.

XP-G2

• No wiring details provided.

VL6180X

• Connected to ESP8266 NodeMCU D5 and D6 (functionality unspecified).

Photodiode

• No wiring details provided.

BMP180

• SCL connected to ESP8266 NodeMCU D3.
• SDA connected to ESP8266 NodeMCU D4.
• GND connected to AMS1117 3.3 GND.
• VCC connected to AMS1117 3.3 VIN.

VL53L0X

• scl connected to ESP8266 NodeMCU D1.
• sda connected to ESP8266 NodeMCU D2.
• gnd connected to ESP8266 NodeMCU GND.
• vin connected to ESP8266 NodeMCU 3V3.

AMS1117 3.3

• VIN connected to LiPoly Battery positive.
• OUT connected to ESP8266 NodeMCU VIN.
• GND connected to LiPoly Battery negative.

LiPoly Battery (1300mAh)

• positive connected to AMS1117 3.3 VIN.
• negative connected to AMS1117 3.3 GND.

Documented Code

ESP8266 NodeMCU Code

#include <Wire.h>
#include <Adafruit_VL53L0X.h>
#include <Adafruit_BMP085.h>
#include <Adafruit_VL6180X.h>

Adafruit_VL53L0X lox = Adafruit_VL53L0X();
Adafruit_BMP085 bmp;
Adafruit_VL6180X vl = Adafruit_VL6180X();

void setup() {
  Serial.begin(115200);
  Wire.begin();

  if (!lox.begin()) {
    Serial.println(F("Failed to boot VL53L0X"));
    while (1);
  }
  Serial.println(F("VL53L0X ready"));

  if (!bmp.begin()) {
    Serial.println(F("Failed to boot BMP180"));
    while (1);
  }
  Serial.println(F("BMP180 ready"));

  if (!vl.begin()) {
    Serial.println(F("Failed to boot VL6180X"));
    while (1);
  }
  Serial.println(F("VL6180X ready"));
}

void loop() {
  // VL53L0X Eye Pressure Measurement
  VL53L0X_RangingMeasurementData_t measure;
  lox.rangingTest(&measure, false);

  if (measure.RangeStatus != 4) {  // phase failures have incorrect data
    float eyePressure = measure.RangeMilliMeter * 0.0075; // Convert to mmHg
    Serial.print("Eye Pressure: ");
    Serial.print(eyePressure);
    Serial.println(" mmHg");

    if (eyePressure > 21) {
      Serial.println("Status: High");
    } else if (eyePressure < 10) {
      Serial.println("Status: Low");
    } else {
      Serial.println("Status: Normal");
    }
  } else {
    Serial.println("VL53L0X Out of range");
  }

  // BMP180 Pressure and Temperature Measurement
  float temperature = bmp.readTemperature();
  float pressure = bmp.readPressure() / 100.0F; // Convert to hPa

  Serial.print("Temperature: ");
  Serial.print(temperature);
  Serial.println(" *C");
  Serial.print("Pressure: ");
  Serial.print(pressure);
  Serial.println(" hPa");

  // VL6180X Distance Measurement
  uint8_t range = vl.readRange();
  uint8_t status = vl.readRangeStatus();

  if (status == VL6180X_ERROR_NONE) {
    Serial.print("Distance: ");
    Serial.print(range);
    Serial.println(" mm");
  } else {
    Serial.println("VL6180X Out of range");
  }

  delay(1000); // Wait for 1 second before next measurement
}

VL6180X Code

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

}

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

}

(Note: The code for the VL6180X microcontroller instance is minimal and does not include any functionality. It may be a placeholder or require further development.)