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Please check these previous sections. Has anything been overlooked?
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Some Linux distributions have the "dialout" group pre-registered for new login-users which enables serial port access out-of-the-box.. Others not. Occasionally, serial port hardware are mapped to other system groups than "dialout". You can identify the system group assigned to serial ports by doing the following:
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ls -l /dev/ttyS* (standard RS-232 cables)
or
ls -l /dev/ttyUSB* (USB serial adapters) |
The output might look like this:
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crw-rw---- 1 root uucp 188, 0 Mar 18 12:41 /dev/ttyUSB0 |
The owner is the root user (system administrator on a Linux system). The system group is in the example above "uucp". Typically it will show "dialout".
Do as follows from the command line shell (if the group is called "dialout"), to allow your login user to access the serial port (by adding the user to the system group):
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sudo adduser <your-login-user> dialout |
Alternatively, use the usermod command to add your login user to the system group that allows read/write access to the serial port:
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su<ENTER> {enter root password} usermod (as root) adduser-a -G dialout <your-login-user> dialout |
INTEL Flash Cards
Back in the '90's the slower INTEL chip were used. It has been found that running the Eazylink popdown on these device may cause the application to fail. If this is happening, please consider upgrading the Flash card to the faster AMD version.
Error messages
Message | Reason | Solution |
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Failed to Open port: COMx Reason (Serial Port is not open) | Another copy of Eazylink Started | Close last started Eazylink |