diff options
| -rw-r--r-- | libraries/Bridge/examples/FileWriteScript/FileWriteScript.ino | 53 | ||||
| -rw-r--r-- | libraries/Bridge/keywords.txt | 1 |
2 files changed, 35 insertions, 19 deletions
diff --git a/libraries/Bridge/examples/FileWriteScript/FileWriteScript.ino b/libraries/Bridge/examples/FileWriteScript/FileWriteScript.ino index d5bbb26..f279de9 100644 --- a/libraries/Bridge/examples/FileWriteScript/FileWriteScript.ino +++ b/libraries/Bridge/examples/FileWriteScript/FileWriteScript.ino @@ -3,6 +3,9 @@ This sketch demonstrate how to write file into the Yún filesystem. A shell script file is created in /tmp, and it is executed afterwards. + + created 7 June 2010 + by Cristian Maglie */ @@ -11,15 +14,14 @@ 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); + // Initialize the Serial + Serial.begin(9600); + + while(!Serial); // wait for Serial port to connect. + Serial.println("File Write Script example\n\n"); // Setup File IO - SD.begin(); + FileSystem.begin(); // Upload script used to gain network statistics uploadScript(); @@ -31,35 +33,48 @@ void loop() { delay(5000); } +// this function creates a file into the linux processor that contains a shell script +// to check the network traffic of the WiFi interface 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); + File script = FileSystem.open("/tmp/wlan-stats.sh", FILE_WRITE); + // Shell script header script.print("#!/bin/sh\n"); - script.print("ifconfig wlan0 | grep \"RX bytes\" | tr ':' ' ' | awk \"{ print \\$3 \\\" \\\" \\$8 }\"\n"); - script.close(); + // shell commands: + // ifconfig: is a command line utility for controlling the network interfaces. + // wlan0 is the interface we want to query + // grep: search inside the output of the ifconfig command the "RX bytes" keyword + // and extract the line that contains it + script.print("ifconfig wlan0 | grep 'RX bytes'\n"); + script.close(); // close the file // Make the script executable Process chmod; - chmod.begin("chmod"); - chmod.addParameter("+x"); - chmod.addParameter("/tmp/wlan-stats.sh"); + chmod.begin("chmod"); // chmod: change mode + chmod.addParameter("+x"); // x stays for executable + chmod.addParameter("/tmp/wlan-stats.sh"); // path to the file to make it executable chmod.run(); } + +// this function run the script and read the output data void runScript() { - // Launch script and show results on the console + // Run the script and show results on the Serial Process myscript; myscript.begin("/tmp/wlan-stats.sh"); myscript.run(); - Console.print("WiFi RX/TX bytes: "); + String output = ""; + + // read the output of the script while (myscript.available()) { - char c = myscript.read(); - Console.print(c); + output += (char)myscript.read(); } - Console.println(); - Console.flush(); + // remove the blank spaces at the beginning and the ending of the string + output.trim(); + Serial.println(output); + Serial.flush(); } diff --git a/libraries/Bridge/keywords.txt b/libraries/Bridge/keywords.txt index faf0773..81b9391 100644 --- a/libraries/Bridge/keywords.txt +++ b/libraries/Bridge/keywords.txt @@ -8,6 +8,7 @@ Bridge KEYWORD3 FileIO KEYWORD3 +FileSystem KEYWORD3 Console KEYWORD3 Process KEYWORD3 MailBox KEYWORD3 |