title: Control a serial device (like usb printer) from an Android app
body: <p>I have two questions about Linux Android.</p>
  
  <p>In the documentation it says:</p>
  
  <p>"Android Debug Bridge (adb) is a versatile command line tool that lets you communicate with an emulator instance or connected Android-powered device."</p>
  
  <p>And apparently there is a way to send a command to serial port (USB) from ADB (Android).</p>
  
  <p>So, I need to send commands (like AT commands) from android device to usb device (printer)</p>
  
  <p>1) The ADB will be present on a real device with android?, which version?</p>
  
  <p>2) is there another alternative?</p>
  
  <p>Thanks in advance</p>