From f4c9f2a73d15489626c59a414613428f765c2730 Mon Sep 17 00:00:00 2001
From: Tom Nordal <tnordal@gmail.com>
Date: Wed, 26 Jun 2024 13:02:28 +0200
Subject: [PATCH] lesson53-55 moved

---
 lessons/lesson53-55.cpp | 39 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 39 insertions(+)
 create mode 100644 lessons/lesson53-55.cpp

diff --git a/lessons/lesson53-55.cpp b/lessons/lesson53-55.cpp
new file mode 100644
index 0000000..90afa40
--- /dev/null
+++ b/lessons/lesson53-55.cpp
@@ -0,0 +1,39 @@
+// https://www.youtube.com/watch?v=M-UKXCUI0rE&list=PLGs0VKk2DiYw-L-RibttcvK-WBZm8WLEP&index=53
+// https://www.youtube.com/watch?v=BTMMNsL0_b0&list=PLGs0VKk2DiYw-L-RibttcvK-WBZm8WLEP&index=54
+// https://www.youtube.com/watch?v=2hwrDSVHQ-E&list=PLGs0VKk2DiYw-L-RibttcvK-WBZm8WLEP&index=55
+
+
+#include <Arduino.h>
+
+int trigPin = 12;
+int echoPin = 11;
+int pingTravleTime;
+float distance;
+const int pulsTime = 40; // uS
+const float pingTimeToDistance = 0.017; // uS to cm, travletime[s] * 340 m/s / 2
+
+void setup() {
+  // put your setup code here, to run once:
+  Serial.begin(9600);
+  pinMode(trigPin, OUTPUT);
+  pinMode(echoPin, INPUT);
+}
+
+void loop() {
+  // put your main code here, to run repeatedly:
+  digitalWrite(trigPin, LOW);
+  delayMicroseconds(pulsTime);
+  digitalWrite(trigPin, HIGH);
+  delayMicroseconds(pulsTime);
+  digitalWrite(trigPin, LOW);
+  pingTravleTime = pulseIn(echoPin, HIGH);
+  delay(25);
+  Serial.print("Ping Time: ");
+  Serial.print(pingTravleTime);
+
+  distance = pingTravleTime * pingTimeToDistance;
+  Serial.print(" Distance: ");
+  Serial.print(distance);
+  Serial.println(" cm");
+
+}