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--- openhw:arduino:arduino_starter_kit_r4 [2026/03/19 11:29] – alexandrospr
+++ openhw:arduino:arduino_starter_kit_r4 [2026/03/21 19:22] (current) – alexandrospr
@@ Line 1: / Line 1: @@
+====== Τι είναι το Arduino Starter Kit R4 ; ======
+Το  Arduino Starter Kit R4 είναι ένα πακέτο εκμάθησης βασικών γνώσεων προγραμματισμού μικροελεγκτών.
+Περιλαμβάνει την πλακέτα [[https://docs.arduino.cc/hardware/uno-r4-wifi/|Arduino UNO R4 WiFi]]
+καθώς και πλήθος βασικών ηλεκτρικών στοιχείων για δημιουργία απλών κυκλωμάτων .
 {{:openhw:arduino:arduino-projects-book.png?200 }}
@@ Line 64: / Line 70: @@
 {{ :openhw:arduino:arduino-starter-kit-ex2-diagram.png?200 }}
+====== Άσκηση 3 (αισθητήρας θερμότητας) ======
+{{:openhw:arduino:arduino-starter-kit-ex3.png?200 |}}
+<code>
+const int sensorPin = A0;
+const float baselineTemp = 27.0;
+void setup() {
+Serial.begin(9600); // open a serial port
+for (int pinNumber = 2; pinNumber<5; pinNumber++) {
+  pinMode(pinNumber, OUTPUT);
+  digitalWrite(pinNumber, LOW);
+}
+}
+void loop() {
+int sensorVal = analogRead(sensorPin);
+Serial.print("Sensor Value: ");
+Serial.print(sensorVal);
+// convert the ADC reading to voltage
+float voltage = (sensorVal/1024.0) * 5.0;
+Serial.print(", Volts: ");
+Serial.print(voltage);
+Serial.print(", degrees C: ");
+// convert the voltage to temperature in degrees
+float temperature = (voltage - 0.5) * 100;
+Serial.println(temperature);
+if(temperature < baselineTemp+2) {
+  digitalWrite(2, LOW);
+  digitalWrite(3, LOW);
+  digitalWrite(4, LOW);
+}else if(temperature >= baselineTemp+2 && temperature < baselineTemp+4) {
+  digitalWrite(2, HIGH);
+  digitalWrite(3, LOW);
+  digitalWrite(4, LOW);
+}else if(temperature >= baselineTemp+4 && temperature < baselineTemp+6) {
+  digitalWrite(2, HIGH);
+  digitalWrite(3, HIGH);
+  digitalWrite(4, LOW);
+}else if(temperature >= baselineTemp+6) {
+  digitalWrite(2, HIGH);
+  digitalWrite(3, HIGH);
+  digitalWrite(4, HIGH);
+}
+delay(1);
+}
+</code>