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--- guides:virtual_modem:section_4 [2021-04-11 20:08]
omolini
+++ guides:virtual_modem:section_4 [2021-04-14 18:56]
omolini [Skip to previous sections]
@@ Line 68: / Line 68: @@
 </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.
-  * Now, go to your SERIAL terminal which should be hooked up to the Raspberry Pi's USB-to-serial adapter, 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.
+  * 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.
-    * Of 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 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 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, feel free to join our Discord channel (see bottom of page for link) for further support. Simple tutorials can only go so far... :)
+    * 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 |}}
@@ Line 110: / Line 110: @@
 ===== Troubleshooting =====
+**Cannot communicate on serial terminal with the vmodem script**\\
+After running the Virtual Modem script on the Raspberry Pi, and connecting it to your computer via the USB-to-Serial adapter and a null modem cable, you should be able to fire up a simple serial terminal on the computer and issue a few Hayes commands to ensure connectivity. Hayes commands are a common way to communicate with Modems, and by typing AT and pressing enter in the terminal, you should see an "OK" response. The vmodem script also recognizes other commands, such as HELP which should provide a short list of recognized commands). If you receive a garbled response after typing AT or HELP, your serial speed settings may not be the same on both ends. Make sure you have adjusted the communication speed to match. If you receive no response whatsoever, you might have a problem with the USB-to-Serial adapter or you may be using an older UART on your computer (see section 2 for more on this). If you're still unable to communicate with the VModem script, feel free to join our Discord channel (see bottom of page for link) for further support. Simple tutorials can only go so far... :)
 **After dialing in, system is disconnected immediately**\\
@@ Line 135: / Line 140: @@
   * [[Guides:Virtual Modem:Section 3|Section 3 - Setting up Raspbian]]
   * [[Guides:Virtual Modem:Section 4|Section 4 - Setting up Virtual Modem]] << You are here
+  * [[Guides:Virtual Modem:Section 5|Section 5 - Using Virtual Modem]]
 ----
 ==== Get In Touch With Us! ====
-Share your thoughts and report bugs on Discord. \\
+Get support, share your thoughts and report bugs on Discord. \\
 [[https://discord.gg/4w6CpZ8|{{:images:social-discord.png?nolink|}}]]
 {{tag>Guides Guides:Networking}}

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