demo buzzer, i2c screen

firmware/platformio.ini

@@ -12,3 +12,8 @@
 platform = atmelavr
 board = uno
 framework = arduino
+
+lib_deps =
+  Wire
+  blackhack/LCD_I2C@^2.3.0
+  luisllamasbinaburo/I2CScanner@^1.0.1

firmware/src/main.cpp

@@ -1,18 +1,62 @@
 #include <Arduino.h>
+#include <Wire.h>
+#include <LCD_I2C.h>
+// #include <I2C_Scanner.h>
+#include <I2CScanner.h>
 
-// put function declarations here:
-int myFunction(int, int);
+#define BUZZER_PIN 11
+
+I2CScanner scanner;
+
+LCD_I2C lcd(0x27, 16, 2);
+
+void helloBuzz();
 
 void setup() {
-  // put your setup code here, to run once:
-  int result = myFunction(2, 3);
+  pinMode(LED_BUILTIN, OUTPUT);
+
+  scanner.Init();
+
+  lcd.begin();
+  lcd.backlight();
+
+  Serial.begin(9600);
+  Serial.println("Hello World!");
+  helloBuzz();
+
+
+}
+
+void buzzOff()
+{
+  noTone(BUZZER_PIN);
+  pinMode(BUZZER_PIN, INPUT);
+}
+
+void helloBuzz() {
+  tone(BUZZER_PIN, 500, 100);
+  delay(100);
+  tone(BUZZER_PIN, 1000, 100);
+  delay(100);
+  tone(BUZZER_PIN, 4000, 100);
+  delay(100);
+  buzzOff();
 }
 
 void loop() {
-  // put your main code here, to run repeatedly:
-}
+  digitalWrite(LED_BUILTIN, HIGH);  // turn the LED on (HIGH is the voltage level)
+  delay(1000);                      // wait for a second
 
-// put function definitions here:
-int myFunction(int x, int y) {
-  return x + y;
-}
+    lcd.clear();
+  digitalWrite(LED_BUILTIN, LOW);   // turn the LED off by making the voltage LOW
+  delay(1000);                      // wait for a second
+
+  tone(BUZZER_PIN, 200, 20);
+
+  scanner.Scan();
+
+  lcd.print("     Hello"); // You can make spaces using well... spaces
+    lcd.setCursor(5, 1); // Or setting the cursor in the desired position.
+    lcd.print("World!");
+
+}