Jade Perreault
Published © CC BY-NC-SA

Helium Air Quality Sensor

A Helium-based air quality sensor and solar setup.

AdvancedFull instructions providedOver 6 days3,175
Helium Air Quality Sensor

Things used in this project

Hardware components

SparkFun Atmospheric Sensor Breakout - BME280
SparkFun Atmospheric Sensor Breakout - BME280
×1
Helium Starter Kit (LEGACY)
Helium Starter Kit (LEGACY)
×1
DS18B20 Programmable Resolution 1-Wire Digital Thermometer
Maxim Integrated DS18B20 Programmable Resolution 1-Wire Digital Thermometer
×1
Raspberry Pi 3 Model B
Raspberry Pi 3 Model B
×1
Adafruit Solar Panel
×1

Software apps and online services

Arduino IDE
Arduino IDE
Fritzing
Librato

Hand tools and fabrication machines

Soldering iron (generic)
Soldering iron (generic)
Drill Taps
OpenBuilds Drill Taps

Story

Read more

Custom parts and enclosures

Base

Lid

Side Brackets

Solar Panel Mount

Leg 1

Leg 2

Leg 3

Leg 4

Schematics

Arduino Helium Gerber

Voltage Coverter

Code

Arduino Code

C/C++
/*
 * Copyright 2017, Helium Systems, Inc.
 * All Rights Reserved. See LICENCE.txt for license information
 */
#include "SparkFunCCS811.h"
#include "Arduino.h"
#include "Board.h"
#include "Helium.h"
#include "HeliumUtil.h"
#include <OneWire.h>
#include<stdio.h>
#include <DS18B20.h>//(Temperature Sensor)
#include "Wire.h"
// NOTE: Please ensure you've created a channel with the above
// CHANNEL_NAME as it's name.
#define CHANNEL_NAME "Helium MQTT"
#define BUFSIZE 9
//=============================
Helium  helium(&atom_serial);
Channel channel(&helium);
//=============================
#define LTCADDR B1101111//Table 1 both LOW (7bit address)
//=============================
#define CCS811_ADDR 0x5B //Default I2C Address
//#define CCS811_ADDR 0x5A //Alternate I2C Address

CCS811 mySensor(CCS811_ADDR);
//=============================
DS18B20 ds(7);
uint8_t address[] = {40, 250, 31, 218, 4, 0, 0, 52};
uint8_t selected;
//=============================
byte ADCvinMSB, ADCvinLSB, curSenseMSB, curSenseLSB, AinVMSB, AinVLSB;
unsigned int ADCvin, ADCcur, AinV;
float inputVoltage, ADCvoltage, current10, current1, current0p1, current0p01;
//=============================
char status;
void connect() {
  while (!helium.connected())
  {
    Serial.print("Connecting - ");
    int status = helium.connect();
    if (report_status(status) != helium_status_OK)
    {
      delay(1000);
    }
  }
}

void channel_create(const char * channel_name ) {
  int8_t result;
  //    int    status;
  do
  {
    connect();
    Serial.println("Creating Channel - ");
    status = channel.begin(channel_name, &result);
  } while (helium_status_OK != status || result != 0);
}

void channel_poll(void * data1, size_t len, size_t * used) {
  char status;
  do
  {
    status = channel.poll_data(data1, len, used);
  } while (report_status(status) != helium_status_OK);
}

void setup(){
    Serial.begin(9600);
    DBG_PRINTLN(F("Starting"));
    Wire.begin();
    // Begin communication with the Helium Atom
    // The baud rate differs per supported board
    // and is configured in Board.h
    helium.begin(HELIUM_BAUD_RATE);

    // Connect the Atom to the Helium Network
    helium_connect(&helium);

    // Begin communicating with the channel. This should only need to
    // be done once. The HeliumUtil functions add simple retry logic
    // to re-create a channel if it disconnects.
    channel_create(&channel, CHANNEL_NAME);
  Serial.print("Devices: ");
  Serial.println(ds.getNumberOfDevices());
  Serial.println();

    //=======================
 //It is recommended to check return status on .begin(), but it is not
  //required.
  CCS811Core::status returnCode = mySensor.begin();
  if (returnCode != CCS811Core::SENSOR_SUCCESS)
  {
    Serial.println(".begin() returned with an error.");
    while (1); //Hang if there was a problem.
  //======================
}
}

void loop(){
//const char * data = "Hello Helium!";
const char data[HELIUM_MAX_DATA_SIZE];
  char data1[HELIUM_MAX_DATA_SIZE];
  size_t data_used;
  char message[56];
  char msg[56];
  int sensorValue;
  int message1;
  int    status;
  int8_t result;
  int v = (inputVoltage);
  int c = (current0p01);
  int t = (ds.getTempC());
  int C0 = (mySensor.getCO2());
  int VOC = (mySensor.getTVOC());
//=============================================================
//========================C0 Sensor============================
//=============================================================
 //Check to see if data is ready with .dataAvailable()
  if (mySensor.dataAvailable())
  {
    //If so, have the sensor read and calculate the results.
    //Get them later
    mySensor.readAlgorithmResults();

    Serial.print("CO2[");
    //Returns calculated CO2 reading
    Serial.print(mySensor.getCO2());
    Serial.print("] tVOC[");
    //Returns calculated TVOC reading
    Serial.print(mySensor.getTVOC());
    Serial.print("] millis[");
    //Simply the time since program start
    Serial.print(millis());
    Serial.print("]");
    Serial.println();
  }

  delay(10); //Don't spam the I2C bus
//===========================================================
//=====================Voltage Sensor========================
//===========================================================
 Wire.beginTransmission(LTCADDR);//first get Input Voltage - 30V max
  Wire.write(0x1E);
  Wire.endTransmission(false);
  Wire.requestFrom(LTCADDR, 2, true);
  delay(1);
  ADCvinMSB = Wire.read();
  ADCvinLSB = Wire.read();
  ADCvin = ((unsigned int)(ADCvinMSB) << 4) + ((ADCvinLSB >> 4) & 0x0F);//formats into 12bit integer
  inputVoltage = ADCvin * 0.025; //25mV resolution
  Wire.beginTransmission(LTCADDR);//get ADC Input 2V max
  Wire.write(0x28);
  Wire.endTransmission(false);
  Wire.requestFrom(LTCADDR, 2, true);
  delay(1);
  AinVMSB = Wire.read();
  AinVLSB = Wire.read();
  AinV = ((unsigned int)(AinVMSB) << 4) + ((AinVLSB >> 4) & 0x0F);//12 bit format
  ADCvoltage = AinV * 0.5E-3; //500uV resolution
  Wire.beginTransmission(LTCADDR);//get sense current
  Wire.write(0x14);
  Wire.endTransmission(false);
  Wire.requestFrom(LTCADDR, 2, true);
  delay(1);
  curSenseMSB = Wire.read();
  curSenseLSB = Wire.read();
  ADCcur = ((unsigned int)(curSenseMSB) << 4) + ((curSenseLSB >> 4) & 0x0F);//12 bit format
  current0p1 = ADCcur * (25E-3) / 0.1; //1A max, unit is mA
  Serial.print("Volts_");
  Serial.println(inputVoltage);
  Serial.print("Amps_");
  Serial.println(current0p01, 2);
  delay(100);
//===========================================================
//===================Temp Sensor=============================
//===========================================================
  while (ds.selectNext())
  {
    switch (ds.getFamilyCode())
      // Print address.
      uint8_t address[8];
    ds.getAddress(address);
    for (uint8_t i = 0; i < 8; i++)
      (ds.getResolution());
    Serial.print(ds.getTempC());
    Serial.print(" C / ");
    Serial.print(ds.getTempF());
    Serial.println(" F");
    sensorValue = ds.getTempC();
  }
//=========================================================
    // Send data to channel
    snprintf(data, 75, "V %d:A %d:T %d:C02 %d:VOC %d", v, c, t, C0, VOC); //NOTE: The values V,A,T,C0,VOC are needed for the next step
    channel_send(&channel, CHANNEL_NAME, data, strlen(data));
    delay(5000);
    // Wait about 5 seconds
}

Arduino Code for Google

C/C++
/*
 * Copyright 2017, Helium Systems, Inc.
 * All Rights Reserved. See LICENCE.txt for license information
 */
#include "SparkFunCCS811.h"
#include "Arduino.h"
#include "Board.h"
#include "Helium.h"
#include "HeliumUtil.h"
#include <OneWire.h>
#include<stdio.h>
#include <DS18B20.h>//(Temperature Sensor)
#include "Wire.h"
// NOTE: Please ensure you've created a channel with the above
// CHANNEL_NAME as it's name.
#define CHANNEL_NAME "Helium MQTT"
#define CHANNEL_NAME2 "Helium_Air_Quality"
#define BUFSIZE 9
//=============================
Helium  helium(&atom_serial);
Channel channel(&helium);
Channel channel2(&helium);
//=============================
#define LTCADDR B1101010//Table 1 both nc (7bit address)
//=============================
#define CCS811_ADDR 0x5B //Default I2C Address
//#define CCS811_ADDR 0x5A //Alternate I2C Address

CCS811 mySensor(CCS811_ADDR);
//=============================
DS18B20 ds(7);
uint8_t address[] = {40, 250, 31, 218, 4, 0, 0, 52};
uint8_t selected;
//=============================
byte ADCvinMSB, ADCvinLSB, curSenseMSB, curSenseLSB, AinVMSB, AinVLSB;
unsigned int ADCvin, ADCcur, AinV;
float inputVoltage, ADCvoltage, current10, current1, current0p1, current0p01;
//=============================
char status;
void connect() {
  while (!helium.connected())
  {
    Serial.print("Connecting - ");
    int status = helium.connect();
    if (report_status(status) != helium_status_OK)
    {
      delay(1000);
    }
  }
}

void channel_create(const char * channel_name ) {
  int8_t result;

  do
  {
    connect();
    Serial.println("Creating Channel - ");
    status = channel.begin(channel_name, &result);
  } while (helium_status_OK != status || result != 0);
}
void channel2_create(const char * channel2_name ) {
  int8_t result;

  do
  {
    connect();
    Serial.println("Creating Channel - ");
    status = channel2.begin(channel2_name, &result);
  } while (helium_status_OK != status || result != 0);
}
void channel_poll(void * data1, size_t len, size_t * used) {
  char status;
  do
  {
    status = channel.poll_data(data1, len, used);
  } while (report_status(status) != helium_status_OK);
}

void setup(){
    Serial.begin(9600);
    DBG_PRINTLN(F("Starting"));
    Wire.begin();
    // Begin communication with the Helium Atom
    // The baud rate differs per supported board
    // and is configured in Board.h
    helium.begin(HELIUM_BAUD_RATE);

    // Connect the Atom to the Helium Network
    helium_connect(&helium);

    // Begin communicating with the channel. This should only need to
    // be done once. The HeliumUtil functions add simple retry logic
    // to re-create a channel if it disconnects.
    channel_create(&channel, CHANNEL_NAME);
  Serial.print("Devices: ");
  Serial.println(ds.getNumberOfDevices());
  Serial.println();

    //=======================
 //It is recommended to check return status on .begin(), but it is not
  //required.
  CCS811Core::status returnCode = mySensor.begin();
  if (returnCode != CCS811Core::SENSOR_SUCCESS)
  {
    Serial.println(".begin() returned with an error.");
    while (1); //Hang if there was a problem.
  //======================
}
}

void loop(){
//const char * data = "Hello Helium!";
const char data[HELIUM_MAX_DATA_SIZE];
  char data1[HELIUM_MAX_DATA_SIZE];
  size_t data_used;
  char message[56];
  char msg[56];
  int sensorValue;
  int message1;
  int    status;
  int8_t result;
  int v = (inputVoltage);
  int c = (current0p01);
  int t = (ds.getTempC());
  int C0 = (mySensor.getCO2());
  int VOC = (mySensor.getTVOC());
//=============================================================
//========================C0 Sensor============================
//=============================================================
 //Check to see if data is ready with .dataAvailable()
  if (mySensor.dataAvailable())
  {
    //If so, have the sensor read and calculate the results.
    //Get them later
    mySensor.readAlgorithmResults();

    Serial.print("CO2[");
    //Returns calculated CO2 reading
    Serial.print(mySensor.getCO2());
    Serial.print("] tVOC[");
    //Returns calculated TVOC reading
    Serial.print(mySensor.getTVOC());
    Serial.print("] millis[");
    //Simply the time since program start
    Serial.print(millis());
    Serial.print("]");
    Serial.println();
  }

  delay(10); //Don't spam the I2C bus
//===========================================================
//=====================Voltage Sensor========================
//===========================================================
 Wire.beginTransmission(LTCADDR);//first get Input Voltage - 30V max
  Wire.write(0x1E);
  Wire.endTransmission(false);
  Wire.requestFrom(LTCADDR, 2, true);
  delay(1);
  ADCvinMSB = Wire.read();
  ADCvinLSB = Wire.read();
  ADCvin = ((unsigned int)(ADCvinMSB) << 4) + ((ADCvinLSB >> 4) & 0x0F);//formats into 12bit integer
  inputVoltage = ADCvin * 0.025; //25mV resolution
  Wire.beginTransmission(LTCADDR);//get ADC Input 2V max
  Wire.write(0x28);
  Wire.endTransmission(false);
  Wire.requestFrom(LTCADDR, 2, true);
  delay(1);
  AinVMSB = Wire.read();
  AinVLSB = Wire.read();
  AinV = ((unsigned int)(AinVMSB) << 4) + ((AinVLSB >> 4) & 0x0F);//12 bit format
  ADCvoltage = AinV * 0.5E-3; //500uV resolution
  Wire.beginTransmission(LTCADDR);//get sense current
  Wire.write(0x14);
  Wire.endTransmission(false);
  Wire.requestFrom(LTCADDR, 2, true);
  delay(1);
  curSenseMSB = Wire.read();
  curSenseLSB = Wire.read();

  ADCcur = ((unsigned int)(curSenseMSB) << 4) + ((curSenseLSB >> 4) & 0x0F);//12 bit format
  current0p1 = ADCcur * (25E-3) / 0.1; //1A max, unit is mA
  Serial.print("Volts_");
  Serial.println(inputVoltage);
  Serial.print("Amps_");
  Serial.println(current0p01, 2);
  delay(100);
  Serial.print("V 10ohm:2.5uA/10mA>");
  Serial.print(current10, 3);
  Serial.print("mA 1ohm:25uA/100mA>");
  Serial.print(current1, 2);
  Serial.print("mA 0.1ohm:250uA/1A>");
  Serial.print(current0p1, 1);
  Serial.println("mA 0.01ohm:2.5mA/10A>");
  delay(10000);
//===========================================================
//===================Temp Sensor=============================
//===========================================================
  while (ds.selectNext())
  {
    switch (ds.getFamilyCode())
      // Print address.
      uint8_t address[8];
    ds.getAddress(address);
    for (uint8_t i = 0; i < 8; i++)
      (ds.getResolution());
    Serial.print(ds.getTempC());
    Serial.print(" C / ");
    Serial.print(ds.getTempF());
    Serial.println(" F");
    sensorValue = ds.getTempC();
  }
//=========================================================
    // Send data to channel
    snprintf(data, 75, "V %d:A %d:T %d:C02 %d:VOC %d", v, c, t, C0, VOC); //NOTE: The values V,A,T,C0,,Z are needed for the next step
    channel_send(&channel, CHANNEL_NAME, data, strlen(data));
    channel_send(&channel2, CHANNEL_NAME2, data, strlen(data));
    Serial.println(strlen(data));
    delay(5000);
    // Wait about 5 seconds
    delay(5000);
}

Credits

Jade Perreault

Jade Perreault

32 projects • 59 followers
27 Years as a Journeyman Electrician , 4 Years as a PCB design engineer for Penteon Corporation Out of New York ..

Comments

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