commit 2b98670f53d5694f806aca2f7b149b6f8f9ce4da
Author: Gerardo Marx <gmarx_cc@itmorelia.edu.mx>
Date:   Tue Jul 19 21:08:27 2022 -0500

    LED and Serial

diff --git a/blinking-serial.ino b/blinking-serial.ino
new file mode 100644
index 0000000..d7d9eac
--- /dev/null
+++ b/blinking-serial.ino
@@ -0,0 +1,30 @@
+/*
+ * 
+ * Example code for ESP32-S:
+ * The code blinks the onboard LED (at D2 in GPIO 02) every 0.500 seconds.
+ * The code also prints by serial communcation the word "Hello" during the 
+ * ON stage of the LED, and then prints "World" during the OFF. 
+ * Gerardo Marx 19/Jul/2022
+ */
+
+// this variable is defined in pins_arduino.h for DOIT ESP32 DEVKIT V1
+// int LED_BUILTIN = 02; 
+int LED_ONBOARD = 02;
+
+void setup() {
+  // put your setup code here, to run once:
+  pinMode(LED_BUILTIN, OUTPUT);
+  //serial  monitor setup
+  Serial.begin(115200);
+}
+
+void loop() {
+  // put your main code here, to run repeatedly:
+  Serial.print("ON");
+  digitalWrite(LED_BUILTIN, HIGH);
+  delay(500);
+  // after delay
+  Serial.print(" - OFF\n");
+  digitalWrite(LED_BUILTIN, LOW);
+  delay(500);
+}