Introduction: Mini Arduino Environment Monitor ** UPDATE - Added RTC ***
This is an Example of how you can use the Arduino to monitor various environmental parameters And display them on a LCD screen.
Note: I Added a Real Time Clock!! To see the steps, added parts and Sketch I added new steps..
Step 1: Parts List
Arduino uno R3 or compatible 30.00
Sainsmart "1.8" TFT Color LCD Display 18.50
DHT11 Digital Temperature and Humidity Sensor 6.44
Mini Breadboard 5.00
Jumper Wire
Step 2: Connect Display to Arduino
I used the mini breadboard to connect the display to the Arduino.
Use jumper wires to connect from the Arduino pins to the breadboard in the following order:
Arduino: 5v TFT DISPLAY VCC
gnd GND
Digital 4 SCL
5 SDA
6 CS
7 DC
8 RES
Step 3: Test the Display
In order to test the display, you will need to download and install two libraries into your Arduino IDE. Although the display is sold by Sainsmart, I had trouble using their libraries and downloaded the libraries from ADAFRUIT, who sells a similar display and has much better documentation and support..I'd normally feel a little guilty about ordering these from SainSmart and using the Adafruit instructions and libraries, but I purchase enough other stuff from Adafruit to appease my conscience. If you end up taking the same route I did, I encourage you to at least look at the other stuff they offer.
Two libraries need to be downloaded and installed: The first is the ST7735 library (which contains the low-level code specific to this device). The second is the Adafruit GFX Library (which handles graphics operations common to many displays that Adafruit sells). Download both ZIP files, uncompress and rename the folders to 'Adafruit_ST7735' and 'Adafruit_GFX' respectively, place them inside your Arduino libraries folder and restart the Arduino IDE.
You should now be able to see the library and examples in select File > Examples > Adafruit_ST7735 > graphicstest sketch. load the sketch to your Arduino.
If you were successful at installing the libraries, and loading the graficstest sketch, Click on the verify button to compile the sketch and make sure there are no errors.
It's time to connect your Arduino to your PC using the USB cable, and click on the upload button to upload the sketch to the Arduino.
Once uploaded, the Arduino should perform all the test display procedures! If you're not seeing anything - check to see if the back-light is on, if the back-light is not lit, something is wrong with the Power wiring. If the back-light is lit ,but you see nothing on the display recheck the digital signals wiring.
If everything is working as expected, we are ready to wire up the DHT sensor.
Step 4: Connect the DHT11 Sensor to the Arduino
As with the display, I used jumper wires to connect the required power and data pins for the DHT11 using the mini Breadboard. Line up the pins and then plug in the sensor.
Looking at the front of the sensor:
From Left to Right
connect pin 1 of DHT11 to 5 V, Pin 2 to Digital Pin 2 of the Arduino, Pin 3 no connection, and Pin 4 to Arduino GND.
That's It!
Step 5: Test the DHT11 Sensor
You need to download another Library to get the Arduino to talk with the DHT11 sensor. The sensor I got didn't come with any documentation, so I Googled around until I found a library that works.
I found it in the Virtualbotix website
As with the display libraries, Download the library unzip it, and install it in the Arduino IDE. Place it inside your Arduino libraries folder , rename it DHT11, and restart the Arduino IDE.
You should now be able to see the library and examples in select File > Examples > DHT11 > dht11_functions sketch.
oad the sketch to your Arduino.
If you were successful at installing the libraries, and loading the dht11_functions sketch, Compile the sketch by clicking on the verify button and make sure there are no errors.
It's time to connect your Arduino to your PC using the USB cable. Click on the upload button to upload the sketch to the Arduino.
Once uploaded to the Arduino, open the serial monitor, and you should see the data stream with information coming from the sensor.
If you got the sensor working, we're now ready to display the data on the TFT Screen..
Attachments
Step 6: Final Step, Displaying Sensor Data on the TFT
// copy the sketch below and paste it into the Arduino IDE compile and run the program.
// this sketch was created using code from both the adafruit and the virtuabotix sample sketches
// You can use any (4 or) 5 pins
#define sclk 4
#define mosi 5
#define cs 6
#define dc 7
#define rst 8 // you can also connect this to the Arduino reset
#define ANALOG_IN 0 // for cds light sensor
#include <Adafruit_GFX.h> // Core graphics library
#include <Adafruit_ST7735.h> // Hardware-specific library
#include <SPI.h>
#include <dht11.h> // dht temp humidity sensor library
dht11 DHT11;
Adafruit_ST7735 tft = Adafruit_ST7735(cs, dc, mosi, sclk, rst);
void setup(void) {
DHT11.attach(2); // set digital port 2 to sense dht input
Serial.begin(9600);
Serial.print("hello!");
tft.initR(INITR_BLACKTAB); // initialize a ST7735S chip, black tab
Serial.println("init");
//tft.setRotation(tft.getRotation()+1); //uncomment to rotate display
// get time to display "sensor up time"
uint16_t time = millis();
tft.fillScreen(ST7735_BLACK);
time = millis() - time;
Serial.println(time, DEC);
delay(500);
Serial.println("done");
delay(1000);
tftPrintTest();
delay(500);
tft.fillScreen(ST7735_BLACK);
// Splash screen for esthetic purposes only
// optimized lines
testfastlines(ST7735_RED, ST7735_BLUE);
delay(500);
testdrawrects(ST7735_GREEN);
delay(500);
tft.fillScreen(ST7735_BLACK);
}
void loop() {
// tft.invertDisplay(true);
// delay(500);
// tft.invertDisplay(false);
tft.setTextColor(ST7735_WHITE);
tft.setCursor(0,0);
tft.println("Sketch has been");
tft.println("running for: ");
tft.setCursor(50, 20);
tft.setTextSize(2);
tft.setTextColor(ST7735_BLUE);
tft.print(millis() / 1000);
tft.setTextSize(1);
tft.setCursor(40, 40);
tft.setTextColor(ST7735_WHITE);
tft.println("seconds");
tft.setCursor(0, 60);
tft.drawLine(0, 50, tft.width()-1, 50, ST7735_WHITE); //draw line separator
tft.setTextColor(ST7735_YELLOW);
tft.print("Temperature (C): ");
tft.setTextColor(ST7735_GREEN);
tft.println((float)DHT11.temperature,1);
tft.setTextColor(ST7735_WHITE);
tft.print("Humidity (%): ");
tft.setTextColor(ST7735_RED);
tft.println((float)DHT11.humidity,1);
tft.setTextColor(ST7735_YELLOW);
tft.print("Temperature (F): ");
tft.setTextColor(ST7735_GREEN);
tft.println(DHT11.fahrenheit(), 1);
tft.setTextColor(ST7735_YELLOW);
tft.print("Temperature (K): ");
// tft.print(" ");
tft.setTextColor(ST7735_GREEN);
tft.println(DHT11.kelvin(), 1);
tft.setTextColor(ST7735_WHITE);
tft.print("Dew Point (C): ");
tft.setTextColor(ST7735_RED);
tft.println(DHT11.dewPoint(), 1);
tft.setTextColor(ST7735_WHITE);
tft.print("DewPointFast(C): ");
tft.setTextColor(ST7735_RED);
tft.println(DHT11.dewPointFast(), 1);
tft.drawLine(0, 110, tft.width()-1, 110, ST7735_WHITE);
tft.setCursor(0,115);
tft.print("Light intensity ");
int val = analogRead(ANALOG_IN);
tft.setCursor(60, 130);
tft.setTextColor(ST7735_YELLOW);
tft.println(val, 1);
delay(2000);
tft.fillScreen(ST7735_BLACK);
}
void tftPrintTest() {
tft.setTextWrap(false);
tft.fillScreen(ST7735_BLACK);
tft.setCursor(0, 60);
tft.setTextColor(ST7735_RED);
tft.setTextSize(2);
tft.println("temperature");
tft.setTextColor(ST7735_YELLOW);
tft.setTextSize(2);
tft.println("humidity");
tft.setTextColor(ST7735_GREEN);
tft.setTextSize(2);
tft.println("monitor");
tft.setTextColor(ST7735_BLUE);
//tft.setTextSize(3);
//tft.print(3598865);
delay(500);
}
void testfastlines(uint16_t color1, uint16_t color2) {
tft.fillScreen(ST7735_BLACK);
for (int16_t y=0; y < tft.height(); y+=5) {
tft.drawFastHLine(0, y, tft.width(), color1);
}
for (int16_t x=0; x < tft.width(); x+=5) {
tft.drawFastVLine(x, 0, tft.height(), color2);
}
}
void testdrawrects(uint16_t color) {
tft.fillScreen(ST7735_BLACK);
for (int16_t x=0; x < tft.width(); x+=6) {
tft.drawRect(tft.width()/2 -x/2, tft.height()/2 -x/2 , x, x, color);
}
}
Step 7: Bonus ! a Light Sensor Using Analog Input
As an Added bonus, you can monitor any analog signal using one of the Arduino analog inputs. As an example , I will use a CDS photo resistor to monitor Light intensity.
You Wil need:
1 CDS photo-resistor
1 10 K ohm resistor
Steps:
Connect the resistor and CDS photocell in series in an unused space in the mini breadboard.
Connect the open leg of the photocell to the +5v
Connect the open leg of the resistor to GND
Connect the CDS Resistor Junction to the Analog input 0 of the Arduino (the code to monitor the input is already in the sample sketch)
You're done!!
You can monitor virtually any analog parameter using this input method: i.e Sound level, wind speed, vibration etc...
Step 8: Video of Running Prototype
http://www.youtube.com/watch?v=ZaEn8vhsrsg&feature=youtu.be
Step 9: UPDATE: Added an Ultrasonic Sensor and Modified Program to Just Update the Numbers
// Program now only refreshes numbers and added range meter. will post another instructable with the progress soon
#define sclk 4
#define mosi 5
#define cs 6
#define dc 7
#define rst 8 // you can also connect this to the Arduino reset
#define ANALOG_IN 0 // for cds light sensor
#define TRIGGER_PIN 12 // Arduino pin tied to trigger pin on the ultrasonic sensor.
#define ECHO_PIN 11 // Arduino pin tied to echo pin on the ultrasonic sensor.
#define MAX_DISTANCE 200 // Maximum distance we want to ping for (in centimeters). Maximum sensor distance is rated at 400-500cm.
#include <Adafruit_GFX.h> // Core graphics library
#include <Adafruit_ST7735.h> // Hardware-specific library
#include <SPI.h>
#include <dht11.h> // dht temp humidity sensor library
#include <NewPing.h> // S04 Ultrasonic sensor Library
dht11 DHT11;
Adafruit_ST7735 tft = Adafruit_ST7735(cs, dc, mosi, sclk, rst);
NewPing sonar(TRIGGER_PIN, ECHO_PIN, MAX_DISTANCE); // NewPing setup of pins and maximum distance.
void setup(void) {
DHT11.attach(2); // set digital port 2 to sense dht input
Serial.begin(115200);
Serial.print("hello!");
tft.initR(INITR_BLACKTAB); // initialize a ST7735S chip, black tab
Serial.println("init");
//tft.setRotation(tft.getRotation()+1); //uncomment to rotate display
uint16_t time = millis();
tft.fillScreen(ST7735_BLACK);
time = millis() - time;
// Serial.println(time, DEC);
// delay(500);
// Serial.println("done");
// delay(1000);
tftPrintTest();
delay(500);
tft.fillScreen(ST7735_BLACK); // Clear screen
// commented lines below are Grid and Square splash Screen
// optimized lines
// testfastlines(ST7735_RED, ST7735_BLUE);
// delay(500);
// testdrawrects(ST7735_GREEN);
// delay(500);
tft.fillScreen(ST7735_BLACK);
}
void loop() {
// tft.invertDisplay(true);
// delay(500);
// tft.invertDisplay(false);
tft.setTextColor(ST7735_WHITE);
tft.setTextSize(1);
tft.setCursor(0,0);
tft.println("Sketch has been");
tft.println("running for: ");
tft.setCursor(50, 20);
tft.setTextSize(2);
tft.setTextColor(ST7735_BLUE, ST7735_BLACK);
tft.print(millis() / 1000);
tft.setTextSize(1);
tft.setCursor(40, 40);
tft.setTextColor(ST7735_WHITE);
tft.println("seconds");
tft.setCursor(0, 60);
tft.drawLine(0, 50, tft.width()-1, 50, ST7735_WHITE);
tft.setTextColor(ST7735_YELLOW);
tft.print("Temperature (C): ");
tft.setTextColor(ST7735_GREEN, ST7735_BLACK);
tft.println((float)DHT11.temperature,1);
tft.setTextColor(ST7735_WHITE);
tft.print("Humidity (%): ");
tft.setTextColor(ST7735_RED, ST7735_BLACK);
tft.println((float)DHT11.humidity,1);
tft.setTextColor(ST7735_YELLOW);
tft.print("Temperature (F): ");
tft.setTextColor(ST7735_GREEN, ST7735_BLACK);
tft.println(DHT11.fahrenheit(), 1);
tft.setTextColor(ST7735_YELLOW);
tft.print("Temperature (K): ");
// tft.print(" ");
tft.setTextColor(ST7735_GREEN, ST7735_BLACK);
tft.println(DHT11.kelvin(), 1);
tft.setTextColor(ST7735_WHITE);
tft.print("Dew Point (C): ");
tft.setTextColor(ST7735_RED, ST7735_BLACK);
tft.println(DHT11.dewPoint(), 1);
tft.setTextColor(ST7735_WHITE);
tft.print("DewPointFast(C): ");
tft.setTextColor(ST7735_RED, ST7735_BLACK);
tft.println(DHT11.dewPointFast(), 1);
tft.drawLine(0, 110, tft.width()-1, 110, ST7735_WHITE);
tft.setCursor(0,115);
tft.print("Light intensity ");
int val = analogRead(ANALOG_IN);
//tft.setCursor(60, 130);
tft.setTextColor(ST7735_YELLOW, ST7735_BLACK);
tft.println(val, 1);
//delay(2000);
delay(500); // Wait 50ms between pings (about 20 pings/sec). 29ms should be the shortest delay between pings.
unsigned int uS = sonar.ping(); // Send ping, get ping time in microseconds (uS).
tft.setCursor(0,130);
tft.setTextColor(ST7735_RED);
tft.print("Distance: ");
tft.setTextColor(ST7735_YELLOW, ST7735_BLACK);
tft.print(uS / US_ROUNDTRIP_CM); // Convert ping time to distance and print result (0 = outside set distance range, no ping echo)
tft.setTextColor(ST7735_RED,ST7735_BLACK);
tft.print(" cm ");
delay(50);
// tft.fillScreen(ST7735_BLACK);
}
void tftPrintTest() {
tft.setTextWrap(false);
tft.fillScreen(ST7735_BLACK);
tft.setCursor(0, 10);
tft.setTextColor(ST7735_WHITE);
tft.setTextSize(1);
tft.println("INSTRUCTABLES.COM");
delay(500);
tft.setCursor(0, 60);
tft.setTextColor(ST7735_RED);
tft.setTextSize(2);
tft.println("temperature");
tft.setTextColor(ST7735_YELLOW);
tft.setTextSize(2);
tft.println("humidity");
tft.setTextColor(ST7735_GREEN);
tft.setTextSize(2);
tft.println("monitor");
tft.setTextColor(ST7735_BLUE);
//tft.setTextSize(3);
//tft.print(3598865);
delay(50);
}
void testfastlines(uint16_t color1, uint16_t color2) {
tft.fillScreen(ST7735_BLACK);
for (int16_t y=0; y < tft.height(); y+=5) {
tft.drawFastHLine(0, y, tft.width(), color1);
}
for (int16_t x=0; x < tft.width(); x+=5) {
tft.drawFastVLine(x, 0, tft.height(), color2);
}
}
void testdrawrects(uint16_t color) {
tft.fillScreen(ST7735_BLACK);
for (int16_t x=0; x < tft.width(); x+=6) {
tft.drawRect(tft.width()/2 -x/2, tft.height()/2 -x/2 , x, x, color);
}
}
Step 10: Latest Stream- Lined Code (sketch) Build. Runs Faster, Looks Better!
// Sketch Build 1.04 compiled on Arduino 1.0.3. Changes from last build: moved static prints to void setup, cleaned up void loop redundant code.
// This sketch was modified to run the loop faster.. refresh rate is about 1.5 seconds.
// copy the sketch below and paste it into the Arduino IDE verify, and run the program.
// this sketch was created using code from the adafruit,the virtuabotix, and newPing sample sketches
#define sclk 4
#define mosi 5
#define cs 6
#define dc 7
#define rst 8
#define ANALOG_IN 0 // for cds light sensor
#define TRIGGER_PIN 12 // Arduino pin tied to trigger pin on the ultrasonic sensor.
#define ECHO_PIN 11 // Arduino pin tied to echo pin on the ultrasonic sensor.
#define MAX_DISTANCE 200 // Maximum distance we want to ping for (in centimeters). Maximum sensor distance is rated at 400-500cm.
#include <Adafruit_GFX.h> // Core graphics library
#include <Adafruit_ST7735.h> // Hardware-specific library
#include <SPI.h>
#include <dht11.h> // DHT11 temp humidity sensor library
#include <NewPing.h> // S04 Ultrasonic sensor Library
dht11 DHT11;
Adafruit_ST7735 tft = Adafruit_ST7735(cs, dc, mosi, sclk, rst);
NewPing sonar(TRIGGER_PIN, ECHO_PIN, MAX_DISTANCE); // NewPing setup of pins and maximum distance.
void setup(void) {
DHT11.attach(2); // set digital port 2 to sense DHT11 input
tft.initR(INITR_BLACKTAB); // initialize a ST7735S chip, black tab
uint16_t time = millis(); // time calculations to display sketch runtime in seconds
tft.fillScreen(ST7735_BLACK);
time = millis() - time;
//tftPrintTest(); //Initial introduction text, uncomment to view on screen
tft.fillScreen(ST7735_BLACK); // Clear screen
// *** Printing static Items on display in the setup void in order to speed up the loop void****
tft.fillScreen(ST7735_BLACK); // clear screen
tft.setTextColor(ST7735_WHITE);
tft.setTextSize(1);
tft.setCursor(0,0);
tft.println("Sketch has been");
tft.println("running for: ");
tft.setCursor(40, 40);
tft.setTextColor(ST7735_WHITE);
tft.println("seconds");
tft.drawLine(0, 50, tft.width()-1, 50, ST7735_WHITE);
tft.setCursor(0, 60);
tft.setTextColor(ST7735_YELLOW);
tft.println("Temperature (C): ");
tft.drawLine(0, 110, tft.width()-1, 110, ST7735_WHITE);
tft.setTextColor(ST7735_WHITE);
tft.println("Humidity (%): ");
tft.setTextColor(ST7735_YELLOW);
tft.println("Temperature (F): ");
tft.setTextColor(ST7735_YELLOW);
tft.println("Temperature (K): ");
tft.setTextColor(ST7735_WHITE);
tft.println("Dew Point (C): ");
tft.setTextColor(ST7735_WHITE);
tft.println("DewPointFast(C): ");
tft.setCursor(0,115);
tft.setTextColor(ST7735_YELLOW);
tft.print("Light intensity ");
}
void loop() {
tft.setCursor(50, 20);
tft.setTextSize(2); //set text size for seconds
tft.setTextColor(ST7735_BLUE, ST7735_BLACK); // set color for seconds
tft.print(millis() / 1000);
tft.setTextSize(1); //set text size for all data coming from DHT11
tft.setCursor(98, 60);
tft.setTextColor(ST7735_GREEN, ST7735_BLACK); // set color for all data coming from DHT11
tft.print((float)DHT11.temperature,2);
tft.setCursor(98, 68);
tft.print((float)DHT11.humidity,2);
tft.setCursor(98, 76);
tft.print(DHT11.fahrenheit(), 2);
tft.setCursor(98, 84);
tft.print(DHT11.kelvin(), 1);
tft.setCursor(98, 92);
tft.print(DHT11.dewPoint(), 2);
tft.setCursor(98,100);
tft.print(DHT11.dewPointFast(), 2);
tft.setCursor(98,115);
int val = analogRead(ANALOG_IN); // READ LIGHT SENSOR VALUE
tft.setTextColor(ST7735_YELLOW, ST7735_BLACK); //set light sensor data text color
tft.print(val, 1); // PRINT LIGHT SENSOR VALUE
tft.print(" ");
delay(50); // Wait 50ms between pings (about 20 pings/sec). 29ms should be the shortest delay between pings.
unsigned int uS = sonar.ping(); // Send ping, get ping time in microseconds (uS).
tft.setCursor(0,130);
tft.setTextColor(ST7735_RED);
tft.print("Distance: ");
tft.setTextColor(ST7735_YELLOW, ST7735_BLACK);
tft.print(uS / US_ROUNDTRIP_CM); // Convert ping time to distance and print result (0 = outside set distance range, no ping echo)
tft.setTextColor(ST7735_RED,ST7735_BLACK);
tft.print(" cm ");
delay(50);
}
void tftPrintTest() {
tft.setTextWrap(false);
tft.fillScreen(ST7735_BLACK);
tft.setCursor(0, 10);
tft.setTextColor(ST7735_WHITE);
tft.setTextSize(1);
tft.println("INSTRUCTABLES.COM");
delay(500);
tft.setCursor(0, 60);
tft.setTextColor(ST7735_RED);
tft.setTextSize(2);
tft.println("temperature");
tft.setTextColor(ST7735_YELLOW);
tft.setTextSize(2);
tft.println("humidity");
tft.setTextColor(ST7735_GREEN);
tft.setTextSize(2);
tft.println("monitor");
tft.setTextColor(ST7735_BLUE);
delay(50);
}
Step 11: Add a Real Time Clock to Monitor
To Add a real time clock to the monitor, you will need:
A TinyRTC Module
4 Jumper wires
The Wire Library
The RTC Library
Step 12:
To Connect the TinyRTC to the Arduino, Refer to the Diagram and:
Connect the RTC VCC to the Arduino +5 v
RTC GND to the Arduino GND
RTC SDA to the Arduino Analog Pin 4
RTC SCL to the Arduino Analog Pin 5
Step 13: Install the Required Libraries
You need to install the required libraries:
Wire Library -This library is included with the Arduino IDE
RTC Library - Have uploaded this library for your convenience, download it and place it inside your Arduino libraries folder.
If you were successful at installing the libraries, load the RTClib>DS1307 sketch, Compile the sketch by clicking on the verify button and make sure there are no errors.
Click on the upload button to upload the sketch to the Arduino.
Once uploaded to the Arduino, open the serial monitor, and you should see data with information coming from the TinyRTC
If you got the TinyRTC working, we're now ready to display the data on the TFT Screen..
Attachments
Step 14: Upload the Sketch Below to Get Time and Temperature in Your Mini Display!
// Sketch Build 1.04 compiled on Arduino 1.0.3.
// This sketch was modified to run the loop faster.. refresh rate is about 1.5 seconds.
// copy the sketch below and paste it into the Arduino IDE verify, and run the program.
// this sketch was created using code from the adafruit-libraries
#define sclk 4
#define mosi 5
#define cs 6
#define dc 7
#define rst 8
#define ANALOG_IN 3 // for cds light sensor
#include <Adafruit_GFX.h> // Core graphics library
#include <Adafruit_ST7735.h> // Hardware-specific library
#include <SPI.h>
#include <Wire.h> // library needed for RTC
#include "RTClib.h" //RTC Library
#include <dht11.h> // DHT11 temp humidity sensor library
RTC_DS1307 RTC;
dht11 DHT11;
Adafruit_ST7735 tft = Adafruit_ST7735(cs, dc, mosi, sclk, rst);
void setup(void) {
DHT11.attach(2); // set digital port 2 to sense DHT11 input
Wire.begin();
RTC.begin();
tft.initR(INITR_BLACKTAB); // initialize a ST7735S chip, black tab
tft.fillScreen(ST7735_BLACK);
//tftPrintTest(); //Initial introduction text, uncomment to view on screen
tft.fillScreen(ST7735_BLACK); // Clear screen
// *** Printing static Items on display in the setup void in order to speed up the loop void****
tft.drawLine(0, 50, tft.width()-1, 50, ST7735_WHITE);
tft.setCursor(0, 60);
tft.setTextColor(ST7735_YELLOW);
tft.println("Temperature (C): ");
tft.drawLine(0, 110, tft.width()-1, 110, ST7735_WHITE);
tft.setTextColor(ST7735_WHITE);
tft.println("Humidity (%): ");
tft.setTextColor(ST7735_YELLOW);
tft.println("Temperature (F): ");
tft.setTextColor(ST7735_YELLOW);
tft.println("Temperature (K): ");
tft.setTextColor(ST7735_WHITE);
tft.println("Dew Point (C): ");
tft.setTextColor(ST7735_WHITE);
tft.println("DewPointFast(C): ");
tft.setCursor(0,115);
tft.setTextColor(ST7735_YELLOW);
tft.print("Light intensity ");
}
void loop() {
tft.setCursor(10,0);
tft.setTextColor(ST7735_WHITE);
tft.setTextSize(1);
tft.println("INSTRUCTABLES.COM");
tft.setTextColor(ST7735_YELLOW,ST7735_BLACK);
tft.setTextSize(1);
tft.setCursor(30,10);
DateTime now = RTC.now();
tft.print(now.year(), DEC);
tft.print('/');
tft.print(now.month(), DEC);
tft.print('/');
tft.print(now.day(), DEC);
tft.println(' ');
tft.setCursor(15,25);
tft.setTextSize(2);
tft.setTextColor(ST7735_BLUE,ST7735_BLACK);
tft.print(now.hour(), DEC);
tft.print(':');
tft.print(now.minute(), DEC);
tft.print(':');
tft.print(now.second(), DEC);
tft.println(" ");
tft.setTextSize(1); //set text size for all data coming from DHT11
tft.setCursor(98, 60);
tft.setTextColor(ST7735_GREEN, ST7735_BLACK); // set color for all data coming from DHT11
tft.print((float)DHT11.temperature,2);
tft.setCursor(98, 68);
tft.print((float)DHT11.humidity,2);
tft.setCursor(98, 76);
tft.print(DHT11.fahrenheit(), 2);
tft.setCursor(98, 84);
tft.print(DHT11.kelvin(), 1);
tft.setCursor(98, 92);
tft.print(DHT11.dewPoint(), 2);
tft.setCursor(98,100);
tft.print(DHT11.dewPointFast(), 2);
tft.setCursor(98,115);
int val = analogRead(ANALOG_IN); // READ LIGHT SENSOR VALUE
tft.setTextColor(ST7735_YELLOW, ST7735_BLACK); //set light sensor data text color
tft.print(val, 1); // PRINT LIGHT SENSOR VALUE
tft.print(" ");
}
void tftPrintTest() {
tft.setTextWrap(false);
tft.fillScreen(ST7735_BLACK);
tft.setCursor(0, 10);
tft.setTextColor(ST7735_WHITE);
tft.setTextSize(1);
tft.println("INSTRUCTABLES.COM");
delay(500);
tft.setCursor(0, 60);
tft.setTextColor(ST7735_RED);
tft.setTextSize(2);
tft.println("temperature");
tft.setTextColor(ST7735_YELLOW);
tft.setTextSize(2);
tft.println("humidity");
tft.setTextColor(ST7735_GREEN);
tft.setTextSize(2);
tft.println("monitor");
tft.setTextColor(ST7735_BLUE);
delay(50);
}
Second Prize in the
Arduino Contest
Finalist in the
Battery Powered Contest
Participated in the
Pocket Sized Electronics
87 Comments
5 years ago
Thanks for sharing !
This is perfect for my computer, and liquid cooling system for my PC !
the dew point calculations are the most important for my application so that my liquid cooler can chill the liquid/coolant without worrying about condensation forming inside the electronics inside my computer case
i wont need the distance sensor i dont think, but will leave it in the code as im so useless with writing Arduino Code that i spend most my days with hand slapped on forehead and crying my eyes out lol
.
i also dont have the exact light sensor or humidity sensor's, but i have these three:
.
.
Humidity & Temp Sensor
https://www.aliexpress.com/item/Industrial-High-Pr...
.
Light intensity Sensor
https://www.aliexpress.com/item/TSL2561-Luminosity...
.
DS3231 RTC - much better time keeping accuracy
https://www.aliexpress.com/item/DS3231-AT24C32-IIC...
.
So i think this will be a major challenge for me, probably gonna take a few months to get the code working properly with the new hardware - wish me luck hehe :)
.
Also anyone with damn good skills in programming with Arduino Code,i would be most grateful for;
any tips or tricks needed for changing sensors of the same sensors that were previously used in the 1930's (LDR's,) lol to newer and more upto date sensors lol
i know this is a very old post, but hoping someone out there still has love for his/her version of these & be able to help me change the libraries and Change/omit the;
.
DHT211 Library with Si7021 Humidity Library (DIFFICULT lol)
RTClib - i think this should also cover the DS3231 RTC Higher Precision RTC Module (Medium Difficulty. lol)
Adding a new Library; TSL2561 Luminosity Sensor Library ( Easy - WOOHOO !! LMAO )
.
Once again, beautiful design, very elegant and simple to follow instructions !
5 years ago
hi there
love it just wish I had the know how to make one as im still struggling to make a simple clock work :(
don't understand how to wright in the time in to the sketch and I keep getting an error message (time not specified) ??? I also get (#include,<wire,h>) error ??
maybe one day ill get it.... but for now im confused ;{
6 years ago
Awesome project!
Would it be possible to do it with data being saved, for example, every 10 mins?
8 years ago
hi, i make a projet but i dont use display, i want use my phone like display, you can help me?
ty
8 years ago on Introduction
Nice project!! Made it with the Arduino Micro
8 years ago on Introduction
Is this possible to make with an Arduino Pro Mini to make it smaller? I am new at this. :D
Reply 8 years ago on Introduction
*and portable.
8 years ago on Introduction
I get the following error when running the example from the library to test the display(step 3)
avrdude: stk500_getsync(): not in sync: resp=0x30
Can anyone help me?
9 years ago on Introduction
Hello, how to refresh the number on the screnn, but without refreshing the entire screen ?!
Reply 8 years ago on Introduction
the code dose that now. give it a try.
9 years ago on Step 4
Brilliant documentation, very clear instruction
9 years ago on Introduction
Hello,
I have this problem, even if I place "versalino.h" in the same directory as the sketch * .ino.
This report would have more information with
"Show verbose output during compilation"
enabled in File > Preferences.
Arduino: 1.0.6 (Windows Vista), Board: "Arduino Uno"
In file included from dht11.cpp:43:
dht11.h:66: error: 'VersalinoBUS' does not name a type
dht11.h:67: error: 'VersalinoBUS' has not been declared
dht11.h:73: error: 'VersalinoBUS' has not been declared
dht11.h:76: error: 'VersalinoBUS' has not been declared
dht11.h:80: error: 'VersalinoBUS' has not been declared
dht11.h:93: error: 'VersalinoBUS' does not name a type
dht11.cpp:59: error: 'VersalinoBUS' has not been declared
dht11.cpp:66: error: 'VersalinoBUS' has not been declared
dht11.cpp: In member function 'void dht11::attach(int, int)':
dht11.cpp:69: error: '_myBUS' was not declared in this scope
dht11.cpp: At global scope:
dht11.cpp:81: error: 'VersalinoBUS' does not name a type
dht11.cpp:91: error: variable or field 'setBUS' declared void
dht11.cpp:91: error: 'VersalinoBUS' was not declared in this scope
dht11.cpp: In member function 'int dht11::read()':
dht11.cpp:111: error: '_myBUS' was not declared in this scope
dht11.cpp: At global scope:
dht11.cpp:116: error: 'VersalinoBUS' has not been declared
dht11.cpp: In member function 'int dht11::read(int, int)':
dht11.cpp:118: error: request for member 'PINS' in 'myBUS', which is of non-class type 'int'
9 years ago on Step 3
thank you so much finally was able to get my lcd screen to work!
9 years ago on Introduction
HI everyone
I have a next problem when I try to compyle
C:\Program Files (x86)\Arduino\libraries\Adafruit_ST7735\Adafruit_ST7735.cpp: In member function 'void Adafruit_ST7735::commonInit(const uint8_t*)':
C:\Program Files (x86)\Arduino\libraries\Adafruit_ST7735\Adafruit_ST7735.cpp:324: error: 'SPI' was not declared in this scope
C:\Program Files (x86)\Arduino\libraries\Adafruit_ST7735\Adafruit_ST7735.cpp:326: error: 'SPI_CLOCK_DIV4' was not declared in this scope
C:\Program Files (x86)\Arduino\libraries\Adafruit_ST7735\Adafruit_ST7735.cpp:334: error: 'SPI_MODE0' was not declared in this scope
9 years ago on Introduction
i am a software developer after reviewing these project i am big fan of Arduino and your's .. thanks a lot for nice share..
in couple of days i am getting my board and other things as soon i do my first test m going to upload :)
thanks once again for lovely share.
9 years ago on Introduction
Would it be possible to add a particle counter to this instructable?
Reply 9 years ago on Introduction
yes, if you find one with an arduino compatible output... but I haven't seen. Any out there...
9 years ago on Introduction
I dont really need the display, but I need to access the sensor values over the network so I can remotely monitor temp/humidity etc. Anyone know how to add networking to this so the temps can be read remotely?
Reply 9 years ago on Introduction
check this instructable out, it might be what you're. Looking for:
https://www.instructables.com/id/Arduino-TempHumidity-with-LCD-and-Web-Interface/
9 years ago on Step 8
Dear Jhon
That's a gr8 project you have built but after watching your vedio i wish to ask you why does the display on the lcd screen keeps on changing is there any way to keep it stable?
regards
sachin