basic i2c demo

examples/GPS_I2C_EchoTest/GPS_I2C_EchoTest.ino

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+// Test code for Adafruit GPS That Support Using I2C
+//
+// This code shows how to test a passthru between USB and I2C
+//
+// Pick one up today at the Adafruit electronics shop
+// and help support open source hardware & software! -ada
+
+#include <Adafruit_GPS.h>
+
+// Connect to the GPS on the hardware I2C port
+Adafruit_GPS GPS(&Wire);
+
+
+void setup() {
+  // wait for hardware serial to appear
+  while (!Serial);
+
+  // make this baud rate fast enough to we aren't waiting on it
+  Serial.begin(115200);
+
+  Serial.println("Adafruit GPS library basic I2C test!");
+  GPS.begin(0x10);  // The I2C address to use is 0x10
+}
+
+
+void loop() {
+  if (Serial.available()) {
+    char c = Serial.read();
+    GPS.write(c);
+  }
+  if (GPS.available()) {
+    char c = GPS.read();
+    Serial.write(c);
+  }
+}