72 lines
2 KiB
Arduino
72 lines
2 KiB
Arduino
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// for sensor
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#include <OneWire.h>
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#include <DallasTemperature.h>
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#define ONE_WIRE_BUS 4
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// Setup a oneWire instance to communicate with any OneWire devices
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OneWire oneWire(ONE_WIRE_BUS);
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// Pass our oneWire reference to Dallas Temperature sensor
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DallasTemperature sensors(&oneWire);
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// for the display
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#include <Wire.h>
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#include <Adafruit_GFX.h>
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#include <Adafruit_SSD1306.h>
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#define SCREEN_WIDTH 128 // OLED display width, in pixels
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#define SCREEN_HEIGHT 64 // OLED display height, in pixels
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// Declaration for an SSD1306 display connected to I2C (SDA, SCL pins)
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Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, -1);
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// Other global variables
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bool fillCircle = false;
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// Draw a small circle, change between emtpy and full to indicate that there is an update on the display and not stock
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void drawCircle() {
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if(fillCircle){
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display.fillCircle(5, 5, 5, WHITE);
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fillCircle = !fillCircle;
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} else {
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display.drawCircle(5, 5, 5, WHITE);
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fillCircle = !fillCircle;
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}
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}
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// small function to write text on the display with option for changing font
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void textToDisplay(char* text = "default", int fontSize = 1) {
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display.clearDisplay();
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drawCircle();
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display.setTextSize(fontSize);
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display.setTextColor(WHITE);
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display.setCursor(20, 0);
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// Display static text
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display.println(text);
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display.display();
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}
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void setup() {
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Serial.begin(9600);
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if(!display.begin(SSD1306_SWITCHCAPVCC, 0x3C)) { // Address 0x3D for 128x64
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Serial.println(F("SSD1306 allocation failed"));
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for(;;);
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}
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// Start up the library
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sensors.begin();
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textToDisplay("Finished setup...");
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delay(1000);
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}
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void loop() {
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// Call sensors.requestTemperatures() to issue a global temperature and Requests to all devices on the bus
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sensors.requestTemperatures();
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float temp = sensors.getTempCByIndex(0);
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String message = String(temp) + " C"; // Convert float to String, then concatenate
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textToDisplay(message.c_str(),2);
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Serial.println(message.c_str());
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delay(1000);
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}
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