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--- guides:virtual_modem:section_4:changing_the_serial_port [2018-09-23 01:43]
omolini
+++ guides:virtual_modem:section_4:changing_the_serial_port [2018-09-23 01:52]
omolini [Update vmodem.sh script]
@@ Line 1: / Line 1: @@
-====== How to change the serial port on the vmodem.sh script =======
+====== How to change the serial port =======
-**Please skip this part ** if your serial port is called ''/dev/ttyUSB0''. Only proceed if this is not the case.
+If you did not see ''/dev/ttyUSB0'' in the device list, and you could not see anything matching your device, you will need to make sure the serial device is connected and supported by Linux. Then try the following:
-  * To update the **vmodem.sh** script stored in **/boot/vmodem/**, do the following:
-  * Edit **/boot/vmodem/vmodem.sh** by running ''sudo nano /boot/vmodem/vmodem.sh''
+===== Finding out the name of the serial device =====
-  * Find the line ''serport=ttyUSB0'' and update it to reflect the correct serial device. For example, if your USB device is called "ttyAMA0", then type in ''serport=ttyAMA0''. Do not enter the full path to the device, the file name is enough.
+If you do not know what your serial device is called, you can do the following.
-  * If you do not see your serial device, or you do not know what it is called, you can do the following.
-    * Disconnect the serial device and run ''**ls** /dev/tty*''. Did you notice something missing compared to the previous printout?
+  * Make sure the USB serial adapted is connected. Then run ''**ls** /dev/tty*''.
-      * Now connect the serial device, wait 5-10 seconds and run ''**ls** /dev/tty*'' again. Do you see a new device in the list?
+  * Disconnect the serial device and run ''**ls** /dev/tty*'' again. Did you notice something missing compared to the previous printout?
-      * If you do not see a new serial device, the device may not be compatible with Linux. Run ''**dmesg**'' to see if it is detected. In my case it is detected, and is named **ttyUSB0**:
+  * Now connect the serial device, wait 5-10 seconds and run ''**ls** /dev/tty*'' again. Do you see a new device in the list?
-{{ :guides:pics:vmodem_raspberry_serial_dmesg.png?600 |}}
+  * If you do not see a new serial device, the device may not be compatible with Linux. Run ''**dmesg**'' to see if it is detected. In my case it is detected, and is named **ttyUSB0**:
+{{ :guides:pics:vmodem_raspberry_serial_dmesg.png |}}
+===== Update vmodem.sh script =====
+  * To change the serial port used in the **vmodem.sh** script, do the following:
+  * Run ''sudo nano /boot/vmodem/vmodem.sh''
+  * Find the line ''serport=ttyUSB0'' and update it to reflect the correct serial device.
+    * For example, if your USB device is called "/dev/ttyAMA0", then make sure the line says ''serport=ttyAMA0''.
+  * Save file by pressing **CTRL + o**, then ENTER to save under the same name.
+  * Exit editor with **CTRL + x**.
 | [[guides:virtual_modem:section_4|Go back to the main article]] |

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