Arduino tehNiq: humidity

original article !

Recently, I received as gift, for tests, a special display named SDA5708. This display was used in old sat receiver Nokia DBOX1 and is,like in title, with 8 character made, each, with 7x5 dot display led.
After I received this display, I search technical info about this display and I found some:
- http://www.bralug.de/wiki/Display_SDA5708
- http://www.sbprojects.com/knowledge/footprints/sda5708/index.php
- http://blog.smue.org/archives/433-DBOX1-SDA5708-display-+-arduino.html
Using info from second article, I redesigned connection schematic:

I made a schematic using info from 3rd article:

and after I upload the changed example sketch, on display I can see:

I made few changes in example sketch, for display my ID used on net:

After this first step, I put an AM2302 with 4k7 rezistor (same as DHT22 sensor) for read temperature and humidity info:

and I change the sketch for see:

Result are good and I put an RTC clock module made with DS3231 and momentary switch like in schematic:

and I can see, after I write sketch named SDA5708_DHT22_ceas_simplu.ino:

Now, I can go to nest level, a full weather station with adjusting clock usin rotary encoder.

I made this schematic:

After I write a full sketch named SDA5708_DHT22_ceas_encoder_v1m2.ino, cyclic, on display I can see:

- clock:

- temerature and relative humidity:

After a short push, I can see the data (day.mounth.year):

After a long push (3-4 seconds), I can d change the data:

- year:

- month:

- day:

- hour:

- minutes:

I made a movie, named weather station with adjusting clock on SDA5708 display where you can see more than I write:

Note: This article is a rearrangement of article from http://arduinotehniq.blogspot.ro/2014/09/arduino-due-and-22-tft-display-with.html

A usual weather station for domestic use must give us information about temperature and humidity, but a good weather station give us information about pressure, too.
I design a weater station with 2.2" TFT display with ILI9341 driver.

I did several experimets with Arduino Uno, then Arduino Mega and my conclusion is that development board are too slow for this display; so, I change classical Arduino board with next step, for me, Arduino Due.

Arduino Due works with 3.3V logical level like ILI9341 driver, so in schematic we not need the logical level convertor (eg CD4050) from 5V to 3.3V as in case use Arduino Uno or Mega.

For control the colour display with ILI9341, I use graphical library named ucglib, derivated from u8glib library for monochrome graphical display.
I decided to use BMP180 sensor for give information about temperature and pressure & DHT11 sensor for give just humidity value, because is not accurate at temperature reading.
My schematic for sensors at Arduino Due is:

In my case, real ensemble is:

For upload a sketch in Arduino Due must install a new version of Arduino IDE, named 1.5.7 Beta (in future, version will be changed, but now 1.5.7 Beta is current version).
For DHT11 sensor must use a new library compatible with Due, I found in a article named Class for DHTxx sensors (xx = 11-21-22-33-44) and for BMP180 I use Adafruit-BMP085.
I write some original sketches for this weather station, and last is:

/*
original sketch by niq_ro from http://nicuflorica.blogspot.com & http://arduinotehniq.blogspot.com using ucglib library
version for 2.2" TFT with ILI9341  - 2014.07.29, Craiova - Romania
use Universal uC Color Graphics Library from https://code.google.com/p/ucglib/
*/
#include <SPI.h>
#include "Ucglib.h"
//Ucglib_ILI9341_18x240x320_HWSPI ucg(/*cd=*/ 6 , /*cs=*/ 5, /*reset=*/ 4); // at Uno
//Ucglib_ILI9341_18x240x320_HWSPI ucg(/*cd=*/ 26 , /*cs=*/ 24, /*reset=*/ 22); // at Mega
//Ucglib_ILI9341_18x240x320_SWSPI ucg(/*sclk=*/ 52, /*data=*/ 51, /*cd=*/ 26 , /*cs=*/ 24, /*reset=*/ 22); //at Mega
//Ucglib_ILI9341_18x240x320_SWSPI ucg(/*sclk=*/ 76, /*data=*/ 75, /*cd=*/ 26 , /*cs=*/ 24, /*reset=*/ 22); //at Mega
Ucglib_ILI9341_18x240x320_HWSPI ucg(/*cd=*/ 26 , /*cs=*/ 24, /*reset=*/ 22); //at Mega or Due
/*

Due  |Mega | Uno | TFT - ILI9341
----------------------
D22  | D22 | D4  | RESET
D24  | D24 | D5  | CS
D26  | D26 | D6  | D/C
 ?   | ?   | LED (via 220 ohms resistor at 5V)
MOSI | D51 | D11 | MOSI
MISO | D50 | D12 | MISO
SCK  | D52 | D13 | SCK
-----------------------------
with CD4050 adapter or 10k resistor, power supply and logical levels is 3.3V
schematic: http://nicuflorica.blogspot.ro/2014/07/afisaj-grafic-color-qvga-de-22-cu.html
*/

#include <dht.h> 
// from http://playground.arduino.cc/Main/DHTLib
dht DHT;

// https://github.com/adafruit/Adafruit-BMP085-Library
#include <Wire.h>
#include <Adafruit_BMP085.h>
Adafruit_BMP085 bmp;

float t1, t2;
float t10, t20;
float t11, t21;
float t12, t22;
float t13, t23;
int h11, h12;
int p1, p2;

void setup() {
delay(1000);
bmp.begin();

ucg.begin(UCG_FONT_MODE_TRANSPARENT);
ucg.clearScreen();
ucg.setFont(ucg_font_ncenR14r);
ucg.setColor(255, 0, 255);
ucg.setColor(1, 255, 0,0);

  ucg.setRotate90();
  ucg.setColor(255, 255, 255); // culoare alba
  ucg.drawFrame(0,0,320,240); //   
  ucg.setFont(ucg_font_courB24); // 20 pixel height
  ucg.setColor(255, 0, 0); // culoare rosie
  ucg.setPrintPos(60,30);
  ucg.print("Ministatie");
  ucg.setColor(0, 255, 0); // culoare verde
  ucg.setColor(0, 255, 0);
  ucg.setColor(0, 0, 255); // culoare albastru
  ucg.setPrintPos(17, 60);
  ucg.print("meteo cu DHT11");
  ucg.setPrintPos(55, 90);
  ucg.setColor(5, 255, 0); // culoare verde
  ucg.print("si BMP180");
  ucg.setFont(ucg_font_fur17r); // 17 pixel height
  ucg.setColor(255, 255, 0); // culoare galbena
  ucg.setPrintPos(25,120);
  ucg.print("ecran grafic 2,2'' (5,6cm)");
  ucg.setFont(ucg_font_courB24); // 20 pixel height 
  ucg.setColor(0, 255, 255); // culoare bleo
  ucg.setPrintPos(10,150);
  ucg.print("QVGA cu ILI9341");
  ucg.setColor(255, 0, 255); // culoare mov
  ucg.setPrintPos(20,180);
  ucg.print("versiune 4.4.0");
  ucg.setFont(ucg_font_fur17r); // 17 pixel height
  ucg.setColor(255, 255, 255); // culoare alb
  ucg.setPrintPos(60,210);
  ucg.print("realizat de niq_ro");

delay(5000);
ucg.clearScreen();
t13=40.0;
h12=40.0;
p2 = 900;
}

void loop() {
 // BMP180 part 
 int p1 = bmp.readPressure()/101.325;
 p1 = p1 * 0.760;
     
 // DHT11 part
 int chk = DHT.read11(37);
 delay(1000);
// timeout;
 int h11 = DHT.humidity; 
 if (DHT.humidity < 0) h11 = 0;

// BMP180 part 2
t12 = bmp.readTemperature();
int t15 = t12;
float t16 = 10*t15;
t16 = t16/10;

t16 = t12;
if (t16 != t13) 
{
temperaturi(t16, t13, 20, 0); // temperature, old temperature, x,y
termometre(t16, 20);
}

if (h11 != h12) 
{
// umiditate(h11, h12, 115, 90); // humidity, old humidity, x, y
 umiditate(h11, h12, 40, 180); // humidity, old humidity, x, y
 barca (h11, h12);
}


if (p1 != p2) 
{
 presiune(p1, p2, 100, 60); // pressure, old pressure, x, y
// barca (h11, h12);
}



//}
delay (2000); 
t13=t16;
h12=h11;
p2=p1;
} // final de program, se revine de la inceput

void temperaturi(float t3, float t4, int ics, int igrec)
{
int t5 = t3;
int t6 = t4;
ucg.setFont(ucg_font_courB24);    
if (t3*t4 < 0)
{ucg.setColor(0, 0, 0); 
for (int qy = 39 ; qy < 60; qy++) 
{
 ucg.drawHLine(ics+7, qy + igrec , 105);
}
}
int t51 = t5/10;
int t61 = t6/10;
ucg.setColor(0, 0, 0); 
if (t51 != t61)
{
for (int qy = 39 ; qy < 60; qy++) 
{
ucg.drawHLine(ics+28, qy + igrec , 21);
}
}
t5 = t3 - t51*10;
t6 = t4 - t61*10;
if (t5 != t6)
{
for (int qy = 39 ; qy < 60; qy++) 
{
ucg.drawHLine(ics+49, qy + igrec , 21);
}
} 
for (int qy = 39 ; qy < 60; qy++) 
{
 ucg.drawHLine(ics+91, qy + igrec , 21);
}
ucg.setColor(255, 0, 0);  
ucg.setPrintPos(10 + ics, 30 + igrec);
//ucg.print("t  :"); 
ucg.print("temperatura:"); 
ucg.setPrintPos(10 + ics, 60 + igrec);
if (t3 > 10.0) ucg.print("+");
else
 if (t3>0.0) ucg.print(" +");
else
 if (t3<0.0)
{
 t3=-t3;
 if (t3 > 10.0) ucg.print("-");
else
 if (t3 > 0.0) ucg.print(" -");
}  
if (t3==0.0) ucg.print("  ");
ucg.print(t3,1); 
ucg.print(" C"); 
ucg.setFont(ucg_font_fur17r); 
ucg.setPrintPos(30 + ics, 35 + igrec);
//if (igrec == 0) ucg.print("int"); 
//else ucg.print("ext"); 
ucg.setPrintPos(115 + ics, 50 + igrec);
ucg.print("o"); 

ucg.setPrintPos(75 + ics, 60 + igrec);
ucg.print(",");


}

void termometre (float t, int ics1)
{
ucg.setColor(255, 255, 255);  
ucg.drawFrame(ics1-4,10,9,200); 
ucg.drawCircle(ics1,220,10,UCG_DRAW_ALL);  
for (int a = 0; a < 10; a++)
{
ucg.drawLine(ics1-5,20+20*a,ics1-7,20+20*a);
ucg.drawLine(ics1+5,20+20*a,ics1+7,20+20*a);
}
ucg.drawLine(ics1-10,140,ics1+10,140);  
ucg.setFont(ucg_font_courB24);    
ucg.setPrintPos(13 + ics1, 149);
ucg.print("0 C"); 
ucg.setFont(ucg_font_fur17r); 
ucg.setPrintPos(37 + ics1, 135);
ucg.print("o"); 
int lin = 140 - 2*t;
ucg.setColor(0, 0, 0);  // black 
ucg.drawBox(ics1-2,21, 5, lin+5);
ucg.setColor(255, 0, 0);  
ucg.drawDisc(ics1,220,8,UCG_DRAW_ALL);  
ucg.drawBox(ics1-2,lin, 5, 210-lin);
}

void umiditate(int h3, int h4, int zet, int igrec1)
{
  ucg.setFont(ucg_font_courB24); // 20 pixel height   

// sterg semnul ??
int h51 = h3/10;
int h61 = h4/10;

ucg.setColor(0, 0, 0); 

// sterg zeci daca e cazul
if (h51 != h61)
{
//ucg.setColor(255, 255, 0); 
ucg.setColor(0, 0, 0); 
for (int qy = 39 ; qy < 60; qy++) 
{
//  ucg.drawHLine(zet+28, qy + igrec1 , 21);
  ucg.drawHLine(zet+40, qy + igrec1, 42);
}
}
  int h5 = h3 - h51*10;
  int h6 = h4 - h61*10;

// sterg unitati daca e cazul
//if ((t5 != t6) || (t5-t6>0.2))
if (h5 != h6)
{
//ucg.setColor(0, 255, 0); 
ucg.setColor(0, 0, 0); 
for (int qy = 39 ; qy < 60; qy++) 
{
  ucg.drawHLine(zet+79, qy + igrec1 , 21);
}
} 

 ucg.setColor(0, 255, 255);  
 ucg.setPrintPos(zet, 30 + igrec1);
 ucg.print("umiditate:"); 


//ucg.setFont(ucg_font_fub42n); // 20 pixel height   
ucg.setPrintPos(40 + zet, 60 + igrec1);
//if (h3 > 10) ucg.print("+");
if (h3 > 10) ucg.print(" ");
else
{
//ucg.setColor(255, 255, 255); 
ucg.setColor(0, 0, 0); 
for (int qy = 39 ; qy < 60; qy++) 
{
  ucg.drawHLine(zet+40, qy + igrec1 , 42);
}
if (igrec1 <30) ucg.setColor(255, 255, 0);  
else ucg.setColor(0, 255, 255); 
ucg.setPrintPos(61 + zet, 60 + igrec1);
//ucg.print("+");
ucg.print(" ");
}
 ucg.print(h3); 
 ucg.print("%"); 
}


void barca (int h, int h2) // new humidity, old humidity.,
{
int xx = 280; 
int yy = 230;

//sterg barca
//ucg.setColor(100,100,100);  
ucg.setColor(0,0,0);  
ucg.drawBox(xx-25, yy-20-h2, 50, 30);


//sterg apa
//ucg.setColor(125, 125, 125);  
ucg.setColor(0, 0, 0);  
ucg.drawBox(xx-35, yy+10-h2, 70, h2-h);

//desenez apa
ucg.setColor(0, 255, 255);  
ucg.drawBox(xx-35, yy+10-h, 70, h);

//desenz barcuta;
//desenez carena
ucg.setColor(255, 255, 0);  
ucg.drawBox(xx-20, yy-h, 40, 10);
ucg.drawTriangle(xx-25, yy-h, xx-20, yy-h, xx-20, yy+10-h);
ucg.drawTriangle(xx+25, yy-h, xx+20, yy-h, xx+20, yy+10-h);
//desenez catarg
ucg.drawBox(xx-1, yy-20-h, 2, 20);
//desenez velele
ucg.setColor(0, 0, 255); // vela albastra  
ucg.drawTriangle(xx+2, yy-20-h, xx+2, yy-h, xx+20, yy-h);
ucg.setColor(255, 0, 0); // vela rosie  
ucg.drawTriangle(xx-2, yy-15-h, xx-2, yy-h, xx-20, yy-h);
}

void presiune (int p3, int p4, int zeti, int igreci)
{
  ucg.setFont(ucg_font_courB24); // 20 pixel height   

// sterg semnul ??
int p51 = p3/10;
int p61 = p4/10;

//ucg.setColor(0, 0, 0); 
ucg.setColor(100, 0, 0); 

// sterg zeci daca e cazul
if (p51 != p61)
{
//ucg.setColor(255, 255, 255); 
ucg.setColor(0, 0, 0); 
for (int qy3 = 39 ; qy3 < 60; qy3++) 
{
//  ucg.drawHLine(zet+28, qy + igrec1 , 21);
//  ucg.drawHLine(zeti+40, qy3 + igreci, 42);
  ucg.drawHLine(zeti+61, qy3 + igreci, 42);
}
}
  int p5 = p3 - p51*10;
  int p6 = p4 - p61*10;

// sterg unitati daca e cazul
//if ((t5 != t6) || (t5-t6>0.2))
if (p5 != p6)
{
//ucg.setColor(0, 255, 0); 
ucg.setColor(0, 0, 0); 
for (int qy4 = 39 ; qy4 < 60; qy4++) 
{
//  ucg.drawHLine(zeti+79, qy4 + igreci , 21);
  ucg.drawHLine(zeti+100, qy4 + igreci , 21);
}
} 

 ucg.setColor(255, 255, 0);  
 ucg.setPrintPos(zeti, 30 + igreci);
 ucg.print("presiune:"); 


//ucg.setFont(ucg_font_fub42n); // 20 pixel height   
ucg.setPrintPos(40 + zeti, 60 + igreci);
//if (h3 > 10) ucg.print("+");
if (p3 > 10) ucg.print(" ");
else
{
//ucg.setColor(255, 255, 255); 
ucg.setColor(0, 0, 0); 
for (int qy5 = 39 ; qy5 < 60; qy5++) 
{
//  ucg.drawHLine(zeti+40, qy5 + igreci , 42);
  ucg.drawHLine(zeti+61, qy5 + igreci , 42);
}
ucg.setColor(255, 255, 0); 
ucg.setPrintPos(61 + zeti, 60 + igreci);
//ucg.print("+");
ucg.print(" ");
}
 ucg.print(p3); 
 ucg.print("mm Hg"); 
}

I made few movies in time of tests, and 2 are in (my) english:
- weather station with Arduino Due on ILI9341 2.2" TFT display

- weather station with Arduino Due on ILI9341 2.2" TFT display (2)

All information on display are in roumanian language, by is easy to change "temperatura" in "temperature", "umiditate" in "humidity" and "presiune" in "pressure".

Bibliography:
1)Afisaj grafic color QVGA de 2,2" cu integrat ILI9341 conectat la Arduino
2)Afisaj grafic color QVGA de 2,2" cu integrat ILI9341 conectat la Arduino (2)
3)Afisaj grafic color QVGA de 2,2" cu integrat ILI9341 conectat la Arduino (3)
4)Afisaj grafic color QVGA de 2,2" cu integrat ILI9341 conectat la Arduino (4)
5)Arduino Due si afisajul QVGA de 2,2" (5,6cm) comandat de ILI9341
6)How to Connect a ILI9341 Display
7)http://arduino.cc/ (whole site, includind forum)

Arduino tehNiq

Total Pageviews

Friday, July 3, 2015

SDA5708: 8 character 7x5 dot matrix LED display

Saturday, October 18, 2014

Weather station with Arduino Due on 2.2" TFT display

Blog Archive

Labels