Waleed Sawan
Created May 28, 2019 © CC BY

CrateMonitor - An advanced IoT System for Crates

CrateMonitor can monitor temperature, gas exposure, and most importantly location, amongst other data points on crates around the world.

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CrateMonitor - An advanced IoT System for Crates

Things used in this project

Hardware components

Electron
Particle Electron
×1
Tilt Sensor, SPST-NC
Tilt Sensor, SPST-NC
×1
DHT11 Temperature & Humidity Sensor (4 pins)
DHT11 Temperature & Humidity Sensor (4 pins)
×1
Ceramic Capacitive Rain Sensor
Telecontrolli Ceramic Capacitive Rain Sensor
×1
Development Kit, Asset Tracker Kit V2
Development Kit, Asset Tracker Kit V2
×1
Grove - Gas Sensor(MQ2)
Seeed Studio Grove - Gas Sensor(MQ2)
×1
Gravity: Analog Flame Sensor For Arduino
DFRobot Gravity: Analog Flame Sensor For Arduino
×1

Software apps and online services

SORACOM Air IoT Connectivity Platform
SORACOM Air IoT Connectivity Platform
Google Maps
Google Maps

Story

Read more

Custom parts and enclosures

Main Sensor Enclosure

This is the main sensor enclosure.

Schematics

Main Sensor Schematic

Code

Main Code

C/C++
Main code that is run on the CrateMonitor IoT Hub.
// This #include statement was automatically added by the Particle IDE.
#include <AssetTracker.h>

/*
Created by Waleed Sawan (Waleed101.github.io)

Copyright 2019 Waleed Sawan

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

*/

int rainSens = D1, sunSens = D2, tempSens = D6, humidSens = D7;
int redLED = D3, blueLED = D4, greenLED = D5;
char publishString[60];
unsigned long lastTime = 0UL;

// Set whether you want the device to publish data to the internet by default here.
// 1 will Particle.publish AND Serial.print, 0 will just Serial.print
// Extremely useful for saving data while developing close enough to have a cable plugged in.
// You can also change this remotely using the Particle.function "tmode" defined in setup()
int transmittingData = 1;

// Used to keep track of the last time we published data
long lastPublish = 0;

// How many minutes between publishes? 10+ recommended for long-time continuous publishing!
int delayMinutes = 10;

// Creating an AssetTracker named 't' for us to reference
AssetTracker t = AssetTracker();

// A FuelGauge named 'fuel' for checking on the battery state
FuelGauge fuel;

// setup() and loop() are both required. setup() runs once when the device starts
// and is used for registering functions and variables and initializing things
void setup() {
    // Sets up all the necessary AssetTracker bits
    t.begin();

    // Enable the GPS module. Defaults to off to save power.
    // Takes 1.5s or so because of delays.
    t.gpsOn();

    // Opens up a Serial port so you can listen over USB
    Serial.begin(9600);

    // These three functions are useful for remote diagnostics. Read more below.
    Particle.function("tmode", transmitMode);
    Particle.function("batt", batteryStatus);
    Particle.function("gps", gpsPublish);
    pinMode(rainSens, INPUT);
    pinMode(sunSens, INPUT);
    pinMode(tempSens, INPUT);
    pinMode(humidSens, INPUT);
    pinMode(redLED, OUTPUT);
    pinMode(blueLED, OUTPUT);
    pinMode(greenLED, OUTPUT);
    Particle.publish("Device Status", "On!");
}

// loop() runs continuously
void loop() {
    // You'll need to run this every loop to capture the GPS output
    t.updateGPS();

    // if the current time - the last time we published is greater than your set delay...
    if (millis()-lastPublish > delayMinutes*60*1000) {
        // Remember when we published
        lastPublish = millis();

        //String pubAccel = String::format("%d,%d,%d", t.readX(), t.readY(), t.readZ());
        //Serial.println(pubAccel);
        //Particle.publish("A", pubAccel, 60, PRIVATE);

        // Dumps the full NMEA sentence to serial in case you're curious
        Serial.println(t.preNMEA());

        // GPS requires a "fix" on the satellites to give good data,
        // so we should only publish data if there's a fix
        if (t.gpsFix()) {
            // Only publish if we're in transmittingData mode 1;
            if (transmittingData) {
                // Short publish names save data!
                Particle.publish("G", t.readLatLon(), 60, PRIVATE);
            }
            // but always report the data over serial for local development
            Serial.println(t.readLatLon());
        }
    }
    
    sprintf(publishString, "%i,%i,%i,%i,%i", analogRead(rainSens), analogRead(sunSens), analogRead(tempSens), analogRead(humidSens));
    Particle.publish("values", publishString);
    delay(3600);
}

// Allows you to remotely change whether a device is publishing to the cloud
// or is only reporting data over Serial. Saves data when using only Serial!
// Change the default at the top of the code.
int transmitMode(String command) {
    transmittingData = atoi(command);
    return 1;
}

// Actively ask for a GPS reading if you're impatient. Only publishes if there's
// a GPS fix, otherwise returns '0'
int gpsPublish(String command) {
    if (t.gpsFix()) {
        Particle.publish("G", t.readLatLon(), 60, PRIVATE);

        // uncomment next line if you want a manual publish to reset delay counter
        // lastPublish = millis();
        return 1;
    } else {
      return 0;
    }
}

// Lets you remotely check the battery status by calling the function "batt"
// Triggers a publish with the info (so subscribe or watch the dashboard)
// and also returns a '1' if there's >10% battery left and a '0' if below
int batteryStatus(String command){
    // Publish the battery voltage and percentage of battery remaining
    // if you want to be really efficient, just report one of these
    // the String::format("%f.2") part gives us a string to publish,
    // but with only 2 decimal points to save space
    Particle.publish("B",
          "v:" + String::format("%.2f",fuel.getVCell()) +
          ",c:" + String::format("%.2f",fuel.getSoC()),
          60, PRIVATE
    );
    // if there's more than 10% of the battery left, then return 1
    if (fuel.getSoC()>10){ return 1;}
    // if you're running out of battery, return 0
    else { return 0;}
}

Credits

Waleed Sawan

Waleed Sawan

4 projects • 8 followers
A 17-year-old innovator from Canada. Fluent in many object-oriented languages, including Java and C. UWO Eng '23.

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