Hello again,
Okay, so now I am having a problem writing a sketch. I used a BMP085 pressure sensor, DHT-11 humidity sensor, Arduino Uno, and Sainsmart TFT screen. Everything is showing up on the screen working fine, but I can't get the BMP085 to read over and over again. What is happening is right when I plug in the Uno, it reads the altitude, pressure, and temperature, but that's it. It reads once, and doesn't keep reading. Here's my sketch:
#include <TFT.h> // Arduino LCD library
#include <SPI.h>
#include <Wire.h>
#include <Adafruit_Sensor.h>
#include <Adafruit_BMP085_U.h>
// Pins SCLK and MOSI are fixed in hardware, and pin 10 (or 53)
// must be an output
//#define sclk 13 // for MEGAs use pin 52
//#define mosi 11 // for MEGAs use pin 51
#define cs 10 // for MEGAs you probably want this to be pin 53
#define dc 9
#define rst 8 // you can also connect this to the Arduino reset
// pin definition for the Leonardo
// #define cs 7
// #define dc 0
// #define rst 1
// create an instance of the library
TFT TFTscreen = TFT(cs, dc, rst);
// char array to print to the screen
char tempPrintout[6];
char humPrintout[6];
Adafruit_BMP085_Unified bmp = Adafruit_BMP085_Unified(10085);
Adafruit_BMP085_Unified a = Adafruit_BMP085_Unified(10085);
// Example testing sketch for various DHT humidity/temperature sensors
// Written by ladyada, public domain
// Fahrenheit conversion added by Steve Spence, http://arduinotronics.blogspot.com
#include <DHT.h> //https://learn.adafruit.com/dht/downloads
#define DHTPIN 2 // what pin we're connected to
// Uncomment whatever type you're using!
#define DHTTYPE DHT11 // DHT 11
//#define DHTTYPE DHT22 // DHT 22 (AM2302)
//#define DHTTYPE DHT21 // DHT 21 (AM2301)
// Connect pin + (middle) of the sensor to +5V
// Connect pin S (on the right) of the sensor to whatever your DHTPIN is
// Connect pin - (on the left) of the sensor to GROUND
// Connect 10k resistor between S and +
int cycleTime = 2000;
DHT dht(DHTPIN, DHTTYPE);
float h;
float t;
char altPrintout[4];
void setup() {
//Put this line at the beginning of every sketch that uses the GLCD:
TFTscreen.begin();
// clear the screen with a black background
TFTscreen.background(0, 0, 0);
// write the static text to the screen
// set the font color to white
TFTscreen.stroke(255,255,255);
// set the font size
TFTscreen.setTextSize(2);
// write the text to the top left corner of the screen
TFTscreen.text("Temp (F)",0,0);
// write the text to the top left corner of the screen
TFTscreen.text("Humidity (%)",0,40);
// ste the font size very large for the loop
TFTscreen.setTextSize(2);
dht.begin();
bmp.begin();
}
void loop() {
// Read the value of the temp/humidity sensor on D2
// Reading temperature or humidity takes about 250 milliseconds!
// Sensor readings may also be up to 2 seconds 'old' (its a very slow sensor)
h = dht.readHumidity();
t = dht.readTemperature();
t = (t*1.8)+32; //C to F conversion
String tempVal = doubleToString(t, 2);
String humVal = doubleToString(h, 0);
String altVal = String(analogRead(A4));
// String sensorVal = String(1.234);
// convert the reading to a char array
tempVal.toCharArray(tempPrintout, 6);
humVal.toCharArray(humPrintout, 6);
altVal.toCharArray(altPrintout, 4);
/* Get a new sensor event */
sensors_event_t event;
bmp.getEvent(&event);
/* Display the results (barometric pressure is measure in hPa) */
if (event.pressure)
{
/* Display atmospheric pressue in hPa */
TFTscreen.print(event.pressure);
TFTscreen.println(" hPa");
/* Calculating altitude with reasonable accuracy requires pressure *
* sea level pressure for your position at the moment the data is *
* converted, as well as the ambient temperature in degress *
* celcius. If you don't have these values, a 'generic' value of *
* 1013.25 hPa can be used (defined as SENSORS_PRESSURE_SEALEVELHPA *
* in sensors.h), but this isn't ideal and will give variable *
* results from one day to the next. *
* *
* You can usually find the current SLP value by looking at weather *
* websites or from environmental information centers near any major *
* airport. *
* *
* For example, for Paris, France you can check the current mean *
* pressure and sea level at: http://bit.ly/16Au8ol */
/* First we get the current temperature from the BMP085 */
float temperature;
bmp.getTemperature(&temperature);
TFTscreen.print(temperature);
TFTscreen.println(" C");
/* Then convert the atmospheric pressure, SLP and temp to altitude */
/* Update this next line with the current SLP for better results */
float seaLevelPressure = SENSORS_PRESSURE_SEALEVELHPA;
TFTscreen.print(bmp.pressureToAltitude(seaLevelPressure,
event.pressure,
temperature));
TFTscreen.println(" m");
TFTscreen.println("");
}
else
{
TFTscreen.println("Sensor error");
}
delay(1000);
// set the font color
TFTscreen.stroke(255,255,255);
// print the sensor value
TFTscreen.text(altPrintout, 0, 25);
TFTscreen.text(altPrintout, 0, 85);
// wait for a moment
delay(cycleTime);
// erase the text you just wrote
TFTscreen.stroke(0,0,0);
TFTscreen.text(altPrintout, 0, 25);
TFTscreen.text(altPrintout, 0, 85);
};
{
// set the font color
TFTscreen.stroke(255,255,255);
// print the sensor value
TFTscreen.text(tempPrintout, 0, 25);
TFTscreen.text(humPrintout, 0, 85);
// wait for a moment
delay(cycleTime);
// erase the text you just wrote
TFTscreen.stroke(0,0,0);
TFTscreen.text(tempPrintout, 0, 25);
TFTscreen.text(humPrintout, 0, 85);
}
//Rounds down (via intermediary integer conversion truncation)
String doubleToString(double input,int decimalPlaces){
if(decimalPlaces!=0){
String string = String((int)(input*pow(10,decimalPlaces)));
if(abs(input)<1){
if(input>0)
string = "0"+string;
else if(input<0)
string = string.substring(0,1)+"0"+string.substring(1);
}
return string.substring(0,string.length()-decimalPlaces)+"."+string.substring(string.length()-decimalPlaces);
}
else {
return String((int)input);
}
}
Any help would be great.
Thanks
Connor
sketch_may13a.ino (5.83 KB)
