Updated File example

2 files changed, 65 insertions, 50 deletions

diff --git a/libraries/Bridge/examples/FileTest/FileTest.ino b/libraries/Bridge/examples/FileTest/FileTest.ino
deleted file mode 100644
index 3fd7ce9..0000000
--- a/libraries/Bridge/examples/FileTest/FileTest.ino
+++ /dev/null
@@ -1,50 +0,0 @@
-
-#include <FileIO.h>
-
-void setup() {
-  Bridge.begin();
-  SD.begin();
-
-  boolean r;
-  r=SD.exists("/arduino/test");
-  if (r) error("1");
-  r=SD.exists("/arduino");
-  if (!r) error("2");
-
-  r=SD.mkdir("/arduino/test");
-  if (!r) error("3");
-  r=SD.exists("/arduino/test");
-  if (!r) error("4");
-
-  File f = SD.open("/arduino/test/bla", FILE_WRITE);
-  if (!f) error("5");
-  f.println("CIAO!");
-  f.close();
-
-  delay(10000);
-
-  r=SD.rmdir("/arduino/test");
-  if (r) error("6");
-  r=SD.remove("/arduino/test");
-  if (r) error("7");
-  
-  r=SD.remove("/arduino/test/bla");
-  if (!r) error("8");
-  r=SD.rmdir("/arduino/test");
-  if (!r) error("9");
-  r=SD.exists("/arduino/test");
-  if (r) error("10");
-}
-
-
-void error(const char *s) {
-  Bridge.print("# ERROR ");
-  Bridge.println(s);
-  while (true);
-}
-
-void loop() {
-}
-
-
-
diff --git a/libraries/Bridge/examples/FileWriteScript/FileWriteScript.ino b/libraries/Bridge/examples/FileWriteScript/FileWriteScript.ino
new file mode 100644
index 0000000..d5bbb26
--- /dev/null
+++ b/libraries/Bridge/examples/FileWriteScript/FileWriteScript.ino
@@ -0,0 +1,65 @@
+/*
+  Write to file using FileIO classes.
+ 
+ This sketch demonstrate how to write file into the Yún filesystem.
+ A shell script file is created in /tmp, and it is executed afterwards.
+ 
+ */
+ 
+#include <FileIO.h>
+
+void setup() {
+  // Setup Bridge (needed every time we communicate with the Arduino Yún)
+  Bridge.begin();
+
+  // Setup Console
+  Console.begin();
+  // Buffering improves Console performance, but we must remember to
+  // finish sending using the Console.flush() command.
+  Console.buffer(64);
+  
+  // Setup File IO
+  SD.begin();
+
+  // Upload script used to gain network statistics  
+  uploadScript();
+}  
+
+void loop() {
+  // Run stats script every 5 secs.
+  runScript();
+  delay(5000);
+}
+
+void uploadScript() {
+  // Write our shell script in /tmp
+  // Using /tmp stores the script in RAM this way we can preserve 
+  // the limited amount of FLASH erase/write cycles
+  File script = SD.open("/tmp/wlan-stats.sh", FILE_WRITE);
+  script.print("#!/bin/sh\n");
+  script.print("ifconfig wlan0 | grep \"RX bytes\" | tr ':' ' ' | awk \"{ print \\$3 \\\" \\\" \\$8 }\"\n");
+  script.close();
+  
+  // Make the script executable
+  Process chmod;
+  chmod.begin("chmod");
+  chmod.addParameter("+x");
+  chmod.addParameter("/tmp/wlan-stats.sh");
+  chmod.run();
+}
+
+void runScript() {
+  // Launch script and show results on the console
+  Process myscript;
+  myscript.begin("/tmp/wlan-stats.sh");
+  myscript.run();
+  
+  Console.print("WiFi RX/TX bytes: ");
+  while (myscript.available()) {
+    char c = myscript.read();
+    Console.print(c);
+  }
+  Console.println();
+  Console.flush();
+}
+