diff --git a/printlib.php b/printlib.php
index b699537..c00e569 100644
--- a/printlib.php
+++ b/printlib.php
@@ -4,9 +4,17 @@ define("MAX_STR", 32);
 define("ESC", "\x1b");
 define("GS", "\x1d");
 define("LF", "\x0a");
-define("PORT", "/dev/usb/lp0")
-function initprint() {}
-function println($data) {}
+define("PORT", "/dev/usb/lp0");
+function initprint() {
+    return file_put_contents(PORT, ESC . "@");
+}
+function println($data) {
+    if (strlen($data)<MAX_CHAR) {
+        return file_put_contents(PORT, $data . LF);
+    } else {
+        return false;
+    }
+}
 function printcode39($data) {}
 function printcode128($data) {}
 function printean13($data) {}