I wanted to have a temperature and humidity and pressure measurement in the shack. There was a load of information on the net. I went for and BMP280 sensor and added a DHT11 sensor. Adapted the software a bit and there we go.<\/p>\n
This time no pics, no schematic just the sketch.<\/p>\n
<\/p>\n
\/\/https:\/\/create.arduino.cc\/projecthub\/Noshirt\/arduino-weather-station-v1-0-bmp280-050e01
\n\/\/ Expanded with DHT11 humidity sensor and adapted LCD display by PA3CSG june 2020<\/p>\n
#include <LiquidCrystal.h> \/\/Library for the LCD screen
\n#include <BMP280.h> \/\/ Library for the BMP280 sensor
\n#include <SimpleDHT.h><\/p>\n
BMP280 bmp; \/\/Initialize your sensor<\/p>\n
LiquidCrystal lcd(12, 11, 5, 4, 3, 2); \/*Initialize your LCD, make sure you wired it correctly *\/<\/p>\n
#define P0 1013.25 \/\/Standard atmospheric pressure
\n#define contrast 9 \/\/9 and 10 are the pins where you wire the matching LCD pins
\n#define brightness 10 \/\/for contrast and brightness regulation<\/p>\n
double T = 0; \/\/Starting temperature value
\ndouble P = 0; \/\/Starting pressure value
\nchar measure = 0;<\/p>\n
\/\/ Initialize humidity sensor.
\nconst int pinDHT11 = 8;
\nSimpleDHT11 dht11;<\/p>\n
void collectData() {
\nmeasure = bmp.startMeasurment();
\nif (measure != 0) {
\ndelay(measure);
\nmeasure = bmp.getTemperatureAndPressure(T, P);
\nif (measure != 0) {
\nP = P + 17; \/\/ ‘+17’ is a correction for the sensor error
\nT = T – 0.8; \/\/ like said above<\/p>\n
\/\/ Read sensor data and store results
\n\/\/ in temperature\/humidity variables
\nbyte temperature = 0;
\nbyte humidity = 0;
\ndht11.read(pinDHT11, &temperature, &humidity, NULL);
\nlcd.clear();
\nlcd.setCursor(0,0);
\nlcd.print(” Temperature: “);
\nlcd.setCursor(5,1);
\nlcd.print(T);
\nlcd.setCursor(10,1);
\nlcd.print((char)223);
\nlcd.print(” C”);
\ndelay (3000);
\nlcd.clear();
\nlcd.setCursor(0,0);
\nlcd.print(” Pressure: “);
\nlcd.setCursor(4,1);
\nlcd.print(P);
\nlcd.setCursor(9,1);
\nlcd.print(” hPa “);
\ndelay (3000);
\nlcd.clear();
\nlcd.setCursor(0,0);
\nlcd.print(” Humidity:”);
\nlcd.setCursor(5,1);
\nSerial.print(humidity);
\nlcd.print(humidity);
\nlcd.setCursor(9,1);
\nlcd.print(“%”);
\ndelay (3000);
\n}
\nelse
\nlcd.print(“Error.”);
\n}
\nelse
\nlcd.print(“Error.”);
\n}<\/p>\n
void setup() {
\nSerial.begin(9600);
\nlcd.begin(16, 2);
\npinMode(contrast, OUTPUT);
\npinMode(brightness, OUTPUT);
\nanalogWrite(contrast, 100); \/\/ ‘100’ and ‘255’ are the contrast and brightness
\nanalogWrite(brightness, 255); \/\/ values I suggest, but you can change them as
\nif (!bmp.begin()) { \/\/ you prefer
\ndelay(1000);
\nlcd.print(“Init. failed.”);
\nlcd.setCursor(0, 1);
\ndelay(1000);
\nlcd.print(“Check wiring.”);
\nwhile (1);
\n}
\nelse
\nlcd.print(“Init. OK.”);<\/p>\n
bmp.setOversampling(4);
\ndelay(2000);
\ncollectData();
\n}<\/p>\n
void loop() {
\ncollectData();<\/p>\n
}<\/p>\n
<\/p>\n","protected":false},"excerpt":{"rendered":"