TEAM 41 IOT ESD Temp & humi

Temp & humidity Sensor designed to monitor ESD controlled rooms.

IntermediateFull instructions provided34

Things used in this project

Hardware components

Particle Photon 2

Adafruit FeatherWing OLED

Adafruit STEMMA QT / Qwiic JST SH 4-Pin Cable

Adafruit Sensirion SHT40 Temperature & Humidity Sensor

Adafruit Lithium Ion Polymer Battery Ideal For Feathers - 3.7V 400mAh

Adafruit FeatherWing Doubler - Prototyping Add-on For All Feather Boards

Software apps and online services

ThingSpeak API

Hand tools and fabrication machines

Soldering iron (generic)

Story

When it comes to manufacturing special rooms are needed. The room our project was designed to help monitor are ESD rooms. ESD rooms are essential for maintaining product quality, ensuring workplace safety, and complying with industry regulations, ultimately contributing to the success and reputation of companies in electronics manufacturing and related fields. Our project is made using a particle photon 2 which is coded to read from a sht40 temp and Humidity sensor. These readings are then displayed to a Oled screen. All of this is powered by a 400mAh lithium battery. The temperature and humidity update every 10 seconds and is shown graphically on thingspeak to give wireless anywhere monitoring.

Some of the problems we ran into were the second photon device which was delayed and shipped back to the manufacturer. After talking to customer service, getting the device only became harder. Besides that, hiccup the coding of the board itself to get it to integrate using webhook was a bit of a bump I'm the road. Particle tells you how to code your webhook with a simple copy and paste. After execution we tried to flash the photon which failed every time come to find you can only have one loop of each kind in your code, so we had to move the webhook into our existing loops and problem was solved.

Photos:

1 / 4

thingspeak.com/channels/2367312/charts/1?bgcolor=%23ffffff&color=%23d62020&dynamic=true&results=60&type=line&update=15

thingspeak.com/channels/2367305/charts/1?bgcolor=%23ffffff&color=%23d62020&dynamic=true&results=60&type=line

Schematics

Code

Code for Photon 2

void setup() {
  Particle.variable("temp", tempC);
  Particle.variable("humi", humi);
  Particle.variable("batt", battV);
  pinMode(S5, INPUT_PULLUP);
  pinMode(D7, OUTPUT);
  Serial.begin(115200);
  initSHT40();
  display.begin(0x3C, true);
  display.clearDisplay();
  display.display();
  display.setRotation(1);
  display.setTextSize(1);
  display.setTextColor(SH110X_WHITE, SH110X_BLACK);
  display.setCursor(0, 0);
  Particle.subscribe("hook-response/TEMP & HUMI", myHandler, MY_DEVICES);
}

void myHandler(const char *event, const char *data) {}

void loop() {
  unsigned long currentMillis = millis();
  if (currentMillis - previousMillis >= interval) {
    previousMillis = currentMillis;
    updateConsole();
  }
  String data = String(humi);
  Particle.publish("TEMP & HUMI", data, PRIVATE);
  delay(10000);
}

void drawConsole() {
  display.drawLine(42, 0, 42, 44, SH110X_WHITE);
  display.drawLine(84, 0, 84, 44, SH110X_WHITE);
  display.drawLine(0, 14, 128, 14, SH110X_WHITE);
  display.drawLine(0, 44, 128, 44, SH110X_WHITE);
  display.setCursor(10, 4);
  display.print("Temp");
  display.setCursor(54, 4);
  display.print("Humi");
  display.setCursor(96, 4);
  display.print("Batt");
  display.display();
}

void updateConsole() {
  sensors_event_t humidity, temp;
  sht4.getEvent(&humidity, &temp);
  tempC = temp.temperature;
  humi = humidity.relative_humidity;
  battV = (analogRead(A6) * 5.0) / 4095;
  display.setCursor(0, 50);
  display.print("  Ethan & Khane 3171");
  display.setCursor(6, 20);
  display.print(tempC * (1.8) + 32);
  display.setCursor(20, 32);
  display.print("F");
  display.setCursor(50, 20);
  display.print(humi);
  display.setCursor(56, 32);
  display.print("%rH");
  display.setCursor(92, 20);
  display.print(battV / 3.7 * 100);
  display.setCursor(102, 32);
  display.print("%");
  display.display();
}