guides:virtual_modem:section_4
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guides:virtual_modem:section_4 [2019-02-18 02:29] omolini [First Test of VModem] |
guides:virtual_modem:section_4 [2022-12-17 19:37] omolini [Skip to other sections] |
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| ====== Section 4 - Setting up Virtual Modem ====== | ====== Section 4 - Setting up Virtual Modem ====== | ||
| ==== Required packages ==== | ==== Required packages ==== | ||
| - | * For the connection script to work properly, your Raspbian installation needs a few prerequisite packages. The most important of these is the PPP daemon "pppd" and IP Tables to route packages. | + | For the connection script to work properly, your Raspbian installation needs a few prerequisite packages. The most important of these is the PPP daemon **"pppd"** and **IP Tables** to route packets. |
| * Run the following commands to install pppd and iptables: | * Run the following commands to install pppd and iptables: | ||
| <code bash> | <code bash> | ||
| - | sudo -s | ||
| sudo apt-get update | sudo apt-get update | ||
| sudo apt-get install ppp iptables | sudo apt-get install ppp iptables | ||
| Line 12: | Line 11: | ||
| In the next chapter we will download and install vmodem onto your Raspberry linux box! | In the next chapter we will download and install vmodem onto your Raspberry linux box! | ||
| - | * If you would like to view the source code and more coding examples, [[Guides:Virtual Modem:Script|click here]] | + | * If you would like to optionally [[Guides:Virtual Modem:Script|view the source code and a few more coding examples, click here]] |
| - | * To download and install vmodem, execute the following commands: | + | * To just download and install vmodem, execute the following commands: |
| <code bash> | <code bash> | ||
| sudo mkdir /boot/vmodem | sudo mkdir /boot/vmodem | ||
| Line 25: | Line 24: | ||
| * **/boot/vmodem/1.sh** | * **/boot/vmodem/1.sh** | ||
| * **/boot/vmodem/ppp.sh** | * **/boot/vmodem/ppp.sh** | ||
| + | |||
| + | * Make sure they are executable: | ||
| + | <code bash> | ||
| + | sudo chmod 770 /boot/vmodem/vmodem.sh | ||
| + | sudo chmod 770 /boot/vmodem/1.sh | ||
| + | sudo chmod 770 /boot/vmodem/ppp.sh | ||
| + | </code> | ||
| ==== Name of the serial port ==== | ==== Name of the serial port ==== | ||
| - | The VModem script has been preconfigured to use **ttyUSB0** as the default serial port name. Usually Raspbian will call its first serial port adapter **ttyUSB0** when using USB to Serial converters, and you will not need to modify this script. However, if the name is something **different**, such as **ttyAMA0**, you may need to update the script to point to the correct serial port name. The following section described how to double-check your serial port name: | + | The VModem script has been preconfigured to use **ttyUSB0** as the default serial port name. Typically Raspbian will call its first serial port adapter **ttyUSB0** when using USB to Serial converters, and you won't need to modify this script. However, if the name is something **different**, such as **ttyAMA0**, you may need to update the script to point to the correct serial port name. The following section described how to double-check your serial port name: |
| To confirm your serial port name, do the following: | To confirm your serial port name, do the following: | ||
| Line 34: | Line 40: | ||
| * Run the command: ''**ls** /dev/tty*'' | * Run the command: ''**ls** /dev/tty*'' | ||
| {{ :guides:pics:raspberry_serial_port_3.png |}} | {{ :guides:pics:raspberry_serial_port_3.png |}} | ||
| - | * If you **do not** see ''/dev/ttyUSB0'' listed, you will need to update the script with the correct serial port. Visit [[Guides:Virtual Modem:Section 4:Changing the serial port|this page]] to update the script with the correct serial port. | + | * If you **do not** see ''/dev/ttyUSB0'' listed, you will need to update the script with the correct serial port. [[Guides:Virtual Modem:Section 4:Changing the serial port|Visit this page]] to update the script with the correct serial port. |
| * If you **do** see ''/dev/ttyUSB0'' listed, continue on! | * If you **do** see ''/dev/ttyUSB0'' listed, continue on! | ||
| + | |||
| + | ==== Name of the ethernet interface ==== | ||
| + | For the sake of this tutorial we have used wired Ethernet. If you want to use Virtual Modem over a **wireless connection**, you will need to make sure it is properly set up, then update the script where it says ''etherp=eth0'' to say ''etherp=wlan0'' instead. To change the ethernet port in the vmodem.sh script, do the following: | ||
| + | - Run ''sudo nano /boot/vmodem/vmodem.sh'' | ||
| + | - Find the line ''etherp=eth0'' and change it to read ''etherp=wlan0''. | ||
| + | - Save file by pressing CTRL + o, then ENTER to save under the same name. | ||
| + | - Exit editor with CTRL + x. | ||
| ==== Network test on the Raspberry Pi ==== | ==== Network test on the Raspberry Pi ==== | ||
| This would be a good time to test your network to eliminate any future headaches. | This would be a good time to test your network to eliminate any future headaches. | ||
| - | Over SSH run the command: | + | * Over SSH run the command: ''ping ''''www.google.com'' |
| - | <code bash> | + | * If you get ping replies, you are all set and the networking on your Raspberry Pi is working. |
| - | ping www.google.com | + | * Press Ctrl + Z to stop ping. |
| - | </code> | + | ==== Initial VModem testing ==== |
| - | * Press Ctrl and Z to stop ping. | + | To test VModem, you should be able to simply run the script. Test it first over SSH to see it's output: |
| - | ==== First Test of VModem ==== | + | |
| - | * To fire up VModem, you should be able to simply run the script. | + | * If you have not done so already, connect one end of your serial cable to the Raspberry Pi's USB-to-serial adapter, and the other end of the serial cable to a computer which has a terminal software installed. You can use any terminal, such as [[https://www.chiark.greenend.org.uk/~sgtatham/putty/latest.html|PuTTY]] or the built-in HyperTerminal on Windows 9x. |
| + | * Make sure you set the appropriate serial speed settings on the terminal program before you connect (by default VModem is set to operate at 57600 bps). | ||
| + | * Connect with the terminal program to the Raspberry Pi. | ||
| + | * Open up PuTTY (or your other SSH client of choice) and connect over SSH to the Raspberry Pi. Issue the following commands. | ||
| <code bash> | <code bash> | ||
| cd /boot/vmodem | cd /boot/vmodem | ||
| Line 52: | Line 68: | ||
| </code> | </code> | ||
| - | * If you see the READY text on the screen, the script is ready to accept connections. | + | * If you see the READY text on the Raspberry Pi, the script is ready to accept connections. |
| - | * Connect the one end of the serial cable to the Raspberry Pi's Serial-USB converter, and the other end to an old computer with a serial port. Use PuTTY, Trumpet Winsock (Windows 3.1) or Dial-up networking (Windows 95) to connect to the Raspberry Pi. | + | * Now, open up a SERIAL terminal on the computer, and issue a few basic Hayes commands. First press ENTER a couple of times to sync up. Then type "AT" and then press ENTER. You should receive an "OK" response. |
| - | * To exit VModem and return you back to shell, you can press **CTRL + z** | + | * If you receive a garbled or no response, the serial speed settings may be wrong. Make sure both computers are set to the same serial speed. |
| - | * If you get any error messages, take a note of them and look for commonalities in any steps you've taken before this step. Open up the script vmodem.sh for editing to make sure the baud and serial port are properly set. If you're unable to figure it out, feel free to contact me (see bottom of page). | + | * If you do not receive any response, something may be wrong with the serial settings, or with the connection to the Raspberry Pi. Does the computer have a fast 16550 UART and a good USB-to-Serial adapter? (check section 2 of this tutorial). |
| + | * Check to see that the vmodem.sh script is running and is receiving your keystrokes. If it working, it should echo your input from the serial terminal to the script's output. | ||
| + | * If you're still not able to get it working, see the Troubleshooting section below. | ||
| + | * On a serial terminal, this is the output you should be getting: | ||
| + | {{ :guides:pics:vmodem_hyperterm.png?600 |}} | ||
| + | * Over on the Raspberry Pi, you should be seeing the corresponding output: | ||
| + | {{ :guides:pics:vmodem_putty2.png |}} | ||
| - | ===== Getting online ===== | + | ---- |
| - | Check out specific guides on how to interface different computers and devices with VModem: | + | |
| - | + | ||
| - | * [[Guides:Connecting Windows 3.1 to the Internet]] | + | |
| - | * [[Guides:Connecting Windows 95/98 to the Internet]] COMING SOON | + | |
| - | * [[Guides:Connecting a Digital VT100 compatible terminal to the Internet]] COMING SOON | + | |
| - | Make sure vmodem.sh is running on the Raspberry Pi first before attempting connection! | + | Go ahead and continue to the next part of this guide, where we will go through using Virtual Modem! |
| - | ===== Making Virtual Modem run at startup ===== | + | | [[Guides:Virtual Modem:Section 3|<< 3 - Setting up Raspbian]] | [[Guides:Virtual Modem:Section 4|This Page]] | [[Guides:Virtual Modem:Section 5|5 - Using Virtual Modem >>]] | |
| - | After you **have verified** that the VModem works properly on the console, and you are able to connect to the Internet, you can make VModem run automatically as a background process after the Raspberry Pi is powered on. | + | |
| - | * Run the following command: | + | |
| - | + | ||
| - | <code bash> | + | |
| - | sudo sh -c 'printf "`head -n -1 /etc/rc.local`\n\ncd /boot/vmodem\n./vmodem.sh &\n\nexit 0\n" >/etc/rc.local' | + | |
| - | </code> | + | |
| - | * To restart the Raspberry and test the changes, issue the following command: | + | |
| - | <code bash> | + | |
| - | sudo shutdown -r now | + | |
| - | </code> | + | |
| - | * After the Raspberry Pi boots, VModem should automatically start up with the system and start expecting connections on serial. | + | |
| ==== Skip to other sections ==== | ==== Skip to other sections ==== | ||
| Line 84: | Line 90: | ||
| * [[Guides:Virtual Modem:Section 2|Section 2 - Shopping list]] | * [[Guides:Virtual Modem:Section 2|Section 2 - Shopping list]] | ||
| * [[Guides:Virtual Modem:Section 3|Section 3 - Setting up Raspbian]] | * [[Guides:Virtual Modem:Section 3|Section 3 - Setting up Raspbian]] | ||
| - | * [[Guides:Virtual Modem:Section 4|Section 4 - Setting up Virtual Modem]] << You are on this page | + | * **[[Guides:Virtual Modem:Section 4|Section 4 - Setting up Virtual Modem]] << You are here** |
| + | * [[Guides:Virtual Modem:Section 5|Section 5 - Using Virtual Modem]] | ||
| * [[Guides:Connecting Windows 3.1 to the Internet]] | * [[Guides:Connecting Windows 3.1 to the Internet]] | ||
| - | * [[Guides:Connecting Windows 95/98 to the Internet]] | + | * [[Guides:Connecting Windows 9x to the Internet]] |
| - | * [[Guides:Connecting a Digital VT100 compatible terminal to the Internet]] | + | * [[Guides:Connecting Windows 2000 to the Internet]] |
| - | * [[Guides:Virtual Modem:Script|Source code and Coding Examples]] | + | |
| ---- | ---- | ||
| - | Questions? Comments? [[:Contact Information|Contact Me!]] | + | ==== Get In Touch With Us! ==== |
| + | Get support, share your thoughts and report bugs on Discord. \\ | ||
| + | [[https://discord.gg/4w6CpZ8|{{:images:social-discord.png?nolink|}}]] | ||
| + | |||
| + | {{tag>Guides Guides:Networking}} | ||
guides/virtual_modem/section_4.txt · Last modified: 2023-11-24 23:16 by omolini
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