Project #11: ESP32 Feather – RHT03 – Mk04

Humidity and Temperature Sensor

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RHT03 – Humidity and Temperature Sensor

The RHT03 is a low cost humidity and temperature sensor with a single wire digital interface. The sensor is calibrated and doesn’t require extra components so you can get right to measuring relative humidity and temperature.

DonLuc1909Mk01

1 x Adafruit HUZZAH32 ESP32 Feather
1 x Adafruit SHARP Memory Display
1 x Adafruit DS3231 Precision RTC FeatherWing
1 x CR1220 12mm Lithium Battery
1 x RHT03 Humidity and Temperature Sensor
1 x LED Green
1 x 100 Ohm
14 x Jumper Wires 3″ M/M
2 x Jumper Wires 6″ M/M
1 x Full-Size Breadboard
1 x SparkFun Cerberus USB Cable

Adafruit HUZZAH32 ESP32 Feather

LG1 – Digital 21
RHT – Digital 17
SCK – Digital 13
MOS – Digital 12
SSD – Digital 27
SDA – Digital 23
SCL – Digital 22
GND – GND
VIN – +3.3V

DL1909Mk01.ino

// ***** Don Luc Electronics *****
// Software Version Information
// Project #11: HUZZAH32 ESP32 Feather - Mk04
// 09-01
// DonLuc1909Mk01p.ino 11-04
// Adafruit HUZZAH32 ESP32 Feather Board
// SHARP Display
// LED Green
// DS3231 Precision RTC
// EEPROM
// RHT03 Humidity and Temperature Sensor

// include Library Code
#include <Adafruit_SharpMem.h>
#include <Adafruit_GFX.h>
#include <RTClib.h>
#include <Wire.h>
#include "EEPROM.h"
#include <SparkFun_RHT03.h>

// SHARP Memory Display
// any pins can be used
#define SHARP_SCK  13
#define SHARP_MOSI 12
#define SHARP_SS   27
// Set the size of the display here, e.g. 144x168!
Adafruit_SharpMem display(SHARP_SCK, SHARP_MOSI, SHARP_SS, 144, 168);
// The currently-available SHARP Memory Display (144x168 pixels)
// requires > 4K of microcontroller RAM; it WILL NOT WORK on Arduino Uno
// or other <4K "classic" devices!
#define BLACK 0
#define WHITE 1
int minorHalfSize; // 1/2 of lesser of display width or height

// LED Green
int iLEDGreen =  21;                 // LED Green

// DS3231 Precision RTC 
RTC_DS3231 RTC;
String sDate;
String sTime;

// The current address in the EEPROM (i.e. which byte
// we're going to  read to next)
#define EEPROM_SIZE 64
String sver = "9-1.p";
// Unit ID information
String uid = "";

// RHT Humidity and Temperature Sensor
const int RHT03_DATA_PIN = 17;          // RHT03 data pin Digital 17
RHT03 rht;                              // This creates a RTH03 object, which we'll use to interact with the sensor
float latestHumidity;
float latestTempC;
float latestTempF;

void loop() {

  // iLEDGreen
  digitalWrite(iLEDGreen,  HIGH );
  // DS3231 Precision RTC 
  timeRTC();
  // RHT03 Humidity and Temperature Sensor
  isRHT03();
  // SHARP Memory Display On
  isDisplayOn();
  // iLEDGreen
  digitalWrite(iLEDGreen,  LOW );   
  // Delay 1
  delay( 1000 );

}

getDisplay.ino

// SHARP Memory Display On
void isDisplayOn() {

    // Clear Display
    display.clearDisplay();
    // text display date, time, LED on
    display.setRotation(4);
    display.setTextSize(2);
    display.setTextColor(BLACK);
    display.setCursor(0,10);
    display.println( sDate );
    display.setCursor(0,30);
    display.println( sTime );
    display.setTextSize(2);
    display.setCursor(0,55);
    display.print("Hum: ");
    display.print( latestHumidity );
    display.println("%");
    display.setCursor(0,75);
    display.print("Cel: ");
    display.print( latestTempC );
    display.println("*C");
    display.setCursor(0,95);
     display.print("Fah: ");
    display.print( latestTempF );
    display.println("*F");
    display.refresh();

}
// SHARP Memory Display - UID
void isDisplayUID() {

    // text display EEPROM
    display.setRotation(4);
    display.setTextSize(3);
    display.setTextColor(BLACK);
    display.setCursor(0,20);
    display.println( sver );
   // display.setTextSize();
    display.setTextColor(BLACK);
    display.setCursor(0,65);
    display.println( uid );
    display.refresh();
    delay( 100 );
    
}

getEEPROM.ino

// EEPROM
void GetUID()
{
  
  // Get unit ID
  uid = "";
  for (int x = 0; x < 5; x++)
  {
    uid = uid + char(EEPROM.read(x));
  }
  
}

getRHT.ino

// RHT03 Humidity and Temperature Sensor
void isRHT03(){

  // Call rht.update() to get new humidity and temperature values from the sensor.
  int updateRet = rht.update();

  // The humidity(), tempC(), and tempF() functions can be called -- after 
  // a successful update() -- to get the last humidity and temperature value 
  latestHumidity = rht.humidity();
  latestTempC = rht.tempC();
  latestTempF = rht.tempF();
  
}

getRTCDS3231.ino

// DS3231 Precision RTC 
void setupRTC() {

  // DS3231 Precision RTC   
  RTC.begin();
  if (! RTC.begin()) {
    while (1);
  }
  
  DateTime now = RTC.now();

  if (RTC.lostPower()) {
    // Following line sets the RTC to the date & time this sketch was compiled
    RTC.adjust(DateTime(F(__DATE__), F(__TIME__)));
  }
  
}
// timeRTC
void timeRTC() {

    // DS3231 Precision RTC 
    sDate = "";
    sTime = "";
    
    DateTime now = RTC.now();

    // sData
    sDate += String(now.year(), DEC);
    sDate += "/";
    sDate += String(now.month(), DEC);
    sDate += "/";
    sDate += String(now.day(), DEC);
    
    // sTime
    sTime += String(now.hour(), DEC);
    sTime += ":";
    sTime += String(now.minute(), DEC);
    sTime += ":";
    sTime += String(now.second(), DEC);

}

setup.ino

// Setup
void setup() {

  // EEPROM with unique ID
  EEPROM.begin(EEPROM_SIZE);
   
  // Get Unit ID
  GetUID();
  
  // SHARP Display start & clear the display
  display.begin();
  display.clearDisplay();

  isDisplayUID();

  delay( 5000 );
  
  // Initialize the LED Green
  pinMode(iLEDGreen, OUTPUT);

  // DS3231 Precision RTC 
  setupRTC();

  // DS3231 Precision RTC 
  timeRTC();

  // RHT03 Humidity and Temperature Sensor
  // Call rht.begin() to initialize the sensor and our data pin
  rht.begin(RHT03_DATA_PIN);
    
}

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