Initial commit

examples/helper/scan_i2c.cpp

@@ -0,0 +1,55 @@
+/*********
+  Rui Santos
+  Complete project details at https://randomnerdtutorials.com
+*********/
+#include <Arduino.h>
+#include <Wire.h>
+#include <SPI.h>
+
+void setup()
+{
+  Wire.begin();
+  Serial.begin(9600);
+  Serial.println("\nI2C Scanner");
+}
+
+void loop()
+{
+  byte error, address;
+  int nDevices;
+  Serial.println("Scanning...");
+  nDevices = 0;
+  for (address = 1; address < 127; address++)
+  {
+    Wire.beginTransmission(address);
+    error = Wire.endTransmission();
+    if (error == 0)
+    {
+      Serial.print("I2C device found at address 0x");
+      if (address < 16)
+      {
+        Serial.print("0");
+      }
+      Serial.println(address, HEX);
+      nDevices++;
+    }
+    else if (error == 4)
+    {
+      Serial.print("Unknow error at address 0x");
+      if (address < 16)
+      {
+        Serial.print("0");
+      }
+      Serial.println(address, HEX);
+    }
+  }
+  if (nDevices == 0)
+  {
+    Serial.println("No I2C devices found\n");
+  }
+  else
+  {
+    Serial.println("done\n");
+  }
+  delay(5000);
+}