re-upload of v2.3

Author: Vino Rodrigues

Arduino/01_Blink/01_Blink.ino

@@ -0,0 +1,36 @@
+/*
+  ESP8266 Blink by Simon Peter
+  Blink the blue LED on the ESP-01 module
+  This example code is in the public domain
+
+  The blue LED on the ESP-01 module is connected to GPIO1
+  (which is also the TXD pin; so we cannot use Serial.print() at the same time)
+
+  Note that this sketch uses LED_BUILTIN to find the pin with the internal LED
+*/
+
+void setup() {
+  pinMode(LED_BUILTIN, OUTPUT);     // Initialize the LED_BUILTIN pin as an output
+
+  Serial.begin(115200);
+  while (!Serial);  // Leonardo: wait for serial monitor
+  Serial.print("Starting... ");
+  Serial.print(LED_BUILTIN);
+  Serial.print("... ");
+
+  Serial.println();
+}
+
+// the loop function runs over and over again forever
+void loop() {
+  digitalWrite(LED_BUILTIN, LOW);   // Turn the LED on (Note that LOW is the voltage level
+  // but actually the LED is on; this is because
+  // it is active low on the ESP-01)
+  delay(333);                      // Wait for a second
+  digitalWrite(LED_BUILTIN, HIGH);
+  delay(333);
+  digitalWrite(LED_BUILTIN, LOW);
+  delay(333);
+  digitalWrite(LED_BUILTIN, HIGH);  // Turn the LED off by making the voltage HIGH
+  delay(2000);                      // Wait for two seconds (to demonstrate the active low LED)
+}

Arduino/02_Scan_I2C/02_scan_i2c.ino

@@ -0,0 +1,72 @@
+// --------------------------------------
+// Modified from: http://playground.arduino.cc/Main/I2cScanner
+// i2c_scanner
+
+#include <Wire.h>
+
+#define SDA_PIN 0
+#define SCL_PIN 2
+
+void setup() {
+  Wire.begin(SDA_PIN, SCL_PIN);
+
+  Serial.begin(57600);
+  while (!Serial);  // Leonardo: wait for serial monitor
+  Serial.println("I2C Scanner (ESP-01)");
+}
+
+
+void loop() {
+  byte error, address;
+  int nDevices;
+
+  Serial.println();  Serial.println();
+  Serial.println("Scanning...");
+
+  nDevices = 0;
+  for(address = 1; address <= 127; address++ ) {
+
+    // delay(1);
+
+    // The i2c_scanner uses the return value of
+    // the Write.endTransmisstion to see if
+    // a device did acknowledge to the address.
+    Wire.beginTransmission(address);
+    error = Wire.endTransmission();
+
+    if (error == 0) {
+
+      nDevices++;
+
+      Serial.print("[");
+      Serial.print(nDevices);
+      Serial.print("] Address = ");
+      Serial.print(address, DEC);
+      Serial.print(" (0x");
+      if (address < 16) Serial.print("0");
+      Serial.print(address, HEX);
+      Serial.println(")");
+
+
+    } else if (error == 4) {
+
+      Serial.print("Error @ (0x");
+      if (address<16) Serial.print("0");
+      Serial.print(address, HEX);
+      Serial.println(")");
+
+    }
+  }
+
+  if (nDevices == 0)
+    Serial.println("No I2C devices found.");
+  else {
+      Serial.print("Found ");
+      Serial.print(nDevices);
+      Serial.print(" I2C device");
+      if (nDevices > 1) Serial.print("s");
+      Serial.println(".");
+  }
+
+  delay(10000);  // wait 5 seconds for next scan
+}