(2) FS200-SHT10 sensors.

Projects Programming
1

I have searched google and have looked through the forums with no results. I have two FS200-SHT10 senors. I currently have one of them (OAT) working and displaying data on my LCD screen. I bought another sensor to monitor the greenhouse inside temp/hum. Is this possible? After looking at the code,even if i change the terminals that the sensor is wired to (10 and 11). The code gets its readings from the same library (OAT = sht1x.readTemperatureF();).

In the end my question is, How do I wire up two of the senors and have it displayed on the LCD screen?

#include <SHT1x.h>
#include <Wire.h>
#include <LCD.h>
#include <LiquidCrystal_I2C.h>
#define dataPin  10
#define clockPin 11
SHT1x sht1x(dataPin, clockPin);


//SET INPUTS
int GHAIRHEATON = 74;       //GREENHOUSE AIR HEATING SETPOINT TO TURN ON
int GHAIRHEATOFF = 75;      //GREENHOUSE AIR HEATING SETPOINT TO TURN OFF
int GHAIRCOOLON = 75;       //GREENHOUSE AIR COOLING SETPOINT TO TURN ON
int GHAIRCOOLOFF = 73;      //GREENHOUSE AIR COOLING SETPOINT TO TURN OFF



int GHHUMPF;
int GHHEATPF;           //GREENHOUSE HEATING PROOF
int GHCOOLINGPF;        //GREEN HOUSE COOLING PROOF
int GHDAMPS;           //
int ALARM;
int GHLIGHT;
int GHDAMPSS;
int GHAIRHEAT = 49;       //TURN ON GREENHOUSE HEATER





LiquidCrystal_I2C  lcd(0x27, 2, 1, 0, 4, 5, 6, 7); // 0x27 is the I2C bus address for an unmodified backpack
void setup()
{
  // activate LCD module
  lcd.begin (20, 4); // for 20 x 4 LCD module
  lcd.setBacklightPin(3, POSITIVE);
  lcd.setBacklight(HIGH);



  //set pin state
  pinMode(50, INPUT);               //HEATER PROOF
  digitalWrite(GHHEATPF, LOW);      //HEATER START OFF
  pinMode(49, OUTPUT);               //HEATER ENABLE
  digitalWrite(GHAIRHEAT, HIGH);      //HEATER START OFF
  pinMode(48, INPUT);               //GREENHOUSE COOOLER
  digitalWrite(GHCOOLINGPF, LOW);   //GREENHOUSE COOLER START OFF
  pinMode(47, INPUT);               //GREENHOUSE DAMPERS
  digitalWrite(GHDAMPS, LOW);       //GREENHOUSE DAMPERS START OFF
  pinMode(46, OUTPUT);
  digitalWrite(GHDAMPSS, LOW);      //GREENHOUSE DAMPERS START OFF
  pinMode(45, INPUT);
  digitalWrite(GHDAMPSS, LOW);      //GREENHOUSE DAMPERS START OFF






  //SET UP THE LCD SCREEN WHEN FIRST TURNED ON
  lcd.home (); // set cursor to 0,0
  lcd.setCursor (5, 0);
  lcd.print("AQUAPONICS");        // go to LINE 5,0 AND PRINT THIS
  lcd.setCursor (2, 1);
  lcd.print(" CONTROLLER 1.0");  // go to LINE 2,1 AND PRINT THIS
  lcd.setCursor (6, 2);
  lcd.print("BY LUCAS");         // go to LINE 2,1 AND PRINT THIS
  delay(5000);
  lcd.noDisplay();               // Turn off the display:
}




void loop()

{
  float GHTEMP;
  float GHHUM;
  float GHLUX;
  float OAT;
  float OAH;
  float GHWT;
  float GHPH;
  float GHDO;
  // Read values from the sensor
  OAT = sht1x.readTemperatureF();
  OAH = sht1x.readHumidity();



  //READ PIN STATE
  GHHEATPF = digitalRead (50);        // heater proof gets wired to pin 50
  GHCOOLINGPF = digitalRead (48);     // heater proof gets wired to pin 48








    //AIR HEATING ENABLE
    
if (OAT > GHAIRHEATON)
{
  digitalWrite(GHAIRHEAT, HIGH);
}
 else if (OAT < GHAIRHEATOFF)
{
  digitalWrite(GHAIRHEAT, LOW);
}

  //DISPLAY GREENHOUSE STATE  
  lcd.clear();                 //CLEAR OFF THE ABOVE TEXT
  lcd.display();
  lcd.setCursor (5, 0);
  lcd.print("GREEN HOUSE");    //DISPLAY GREEN HOUSE DATA
  lcd.setCursor (0, 1);
  lcd.print("TEMP:");          //DISPLAY THE WORD TEMP THEN THE VALUE
  lcd.setCursor (5, 1);
  lcd.print(GHTEMP, 1);
  lcd.print("F");
  lcd.setCursor (0, 2);        //DISPLAY STATE OF HEATER
  lcd.print("HEAT:");
  if (GHHEATPF == HIGH) {    //IF HEATER IS ON THEN DISPLAY ON
    lcd.setCursor (5, 2);
    lcd.print("ON");
  }
  else
  {
    lcd.setCursor (5, 2);    //IF COOLING IS OFF THEN DISPLAY OFF
    lcd.print("OFF");
  }
  lcd.setCursor (0, 3);       //DISPLAY STATE OF COOLING IN GREEN HOUSE
  lcd.print("COOLING:");
  if (GHCOOLINGPF == HIGH) {   //IF COOLING IS ON THEN DISPLAY ON
    lcd.setCursor (8, 3);
    lcd.print("ON");
  }
  else
  {
    lcd.setCursor (8, 3);    //IF COOLING IS OFF THEN DISPLAY OFF
    lcd.print("OFF");
  }
  lcd.setCursor (11, 2);      //DISPLAY STATE OF DAMPER
  lcd.print("DAMP:");
  if (GHDAMPS == HIGH) {   //IF DAMPER IS OPEN THEN DISPLAY OPN
    lcd.setCursor (16, 2);
    lcd.print("OPN");
  }
  else
  {
    lcd.setCursor (16, 2);    //IF DAMPER IS CLOSED THEN DISPLAY CLO
    lcd.print("CLO");
  }
  lcd.setCursor (11, 1);
  lcd.print("OAT:");          //DISPLAY THE WORD TEMP THEN THE OUTSIDE AIR TEMP VALUE
  lcd.setCursor (15, 1);
  lcd.print(OAT, 1);
  lcd.print("F");


  //MAKE A 2ND PAGE
  delay(5000);
  lcd.clear();                 //CLEAR OFF THE ABOVE TEXT
  lcd.display();
  lcd.setCursor (5, 0);
  lcd.print("GREEN HOUSE");    //DISPLAY GREEN HOUSE DATA
  lcd.setCursor (0, 1);

  //GREEN HOUSE HUM DISTPLAY
  lcd.setCursor (0, 1);
  lcd.print("HUM:");        //DISPLAY THE HUM THEN THE VALUE
  lcd.setCursor (4, 1);
  lcd.print(GHHUM);
  lcd.print("%");

  //OUTSIDE HUM DISPLAY
  lcd.setCursor (11, 1);
  lcd.print("OAH:");        //DISPLAY THE HUM THEN THE VALUE
  lcd.setCursor (15, 1);
  lcd.print(OAH, 1);
  lcd.print("%");

  //HUM STATE
  lcd.setCursor (11, 2);           //DISPLAY STATE OF HUM
  lcd.print("HUM:");
  if (GHHUMPF == HIGH) {    //IF HUM IS ON THEN DISPLAY ON
    lcd.setCursor (17, 2);
    lcd.print("ON");
  }
  else
  {
    lcd.setCursor (17, 2);       //IF HUM IS OFF THEN DISPLAY OFF
    lcd.print("OFF");
  }
  delay (5000);



  //DISPLAY 3 LIGHT CONTROLLS
  lcd.clear();                 //CLEAR OFF THE ABOVE TEXT
  lcd.display();
  lcd.setCursor (5, 0);
  lcd.print("GREEN HOUSE");    //DISPLAY GREEN HOUSE DATA
  lcd.setCursor (0, 1);
  lcd.print("LUX:");       //DISPLAY THE LUMES THEN THE VALUE
  lcd.setCursor (4, 1);
  lcd.print(GHLUX);
  lcd.print("");
  lcd.setCursor (0, 3);           //DISPLAY STATE OF lights
  lcd.print("LIGHT:");
  if (GHLIGHT == HIGH) {    //IF lights are ON THEN DISPLAY ON
    lcd.setCursor (5, 3);
    lcd.print("ON");
  }
  else
  {
    lcd.setCursor (6, 3);       //IF lights are OFF THEN DISPLAY OFF
    lcd.print("OFF");
  }
  lcd.setCursor (0, 2);
  lcd.print("HOURS NEEDED:");       //DISPLAY THE NUMBER OF HOURS NEEDED OF LIGHT
  lcd.setCursor (5, 1);
  lcd.print("");
  lcd.print("");



  //DISPLAY 3 FISH SIDE
  delay(5000);
  lcd.clear();                 //CLEAR OFF THE ABOVE TEXT
  lcd.display();
  lcd.setCursor (8, 0);
  lcd.print("FISH");           //DISPLAY FISH DATA

  lcd.setCursor (0, 1);
  lcd.print("TEMP:");    //DISPLAY THE WATER TEMP THEN THE VALUE
  lcd.setCursor (5, 1);
  lcd.print(GHWT);
  lcd.print("F");
  //WATER PH
  lcd.setCursor (0, 2);
  lcd.print("PH:");    //DISPLAY THE WATER TEMP THEN THE VALUE
  lcd.setCursor (3, 2);
  lcd.print(GHPH);
  //WATER DO
  lcd.setCursor (0, 3);
  lcd.print("DO:");    //DISPLAY THE WATER TEMP THEN THE VALUE
  lcd.setCursor (3, 3);
  lcd.print(GHDO);


/*
    
    (OAT >= GHAIRHEATON);
    digitalWrite(GHAIRHEAT, HIGH);
     (OAT <= GHAIRHEATOFF);
    digitalWrite(GHAIRHEAT, LOW);
*/



  delay(5000);
}
2

You just need to create a second instance

#define dataPin  10
#define clockPin 11
SHT1x sht1x(dataPin, clockPin);
#define dataPin2  8
#define clockPin2 9
SHT1x sht1x2(dataPin2, clockPin2);

I personally would change the names to something more meaningful to your project

SHT1x OATSensor(dataPin, clockPin);
SHT1x GreenhouseSensor(dataPin2, clockPin2);

And I would get rid of all those CAPITAL LETTER variables and comments, but that's just me.

3

Thank you very much! It works! I will change the caps and the comments.

4

Hey,

I have the same sensor and would like to use it to monitor my composting bin... However I dont know how to do that. How to connect the Sda and Sck pins to Arduino? Secondly, would you share the updated code too, please?