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I work with an RS-232 device via GNU screen.

$ screen /dev/ttyUSB0 115200

At some point I need to send a local file to the device using either the xmodem or kermit protocol. On Windows I use TeraTerm which has a corresponding menu item. How can I achieve this in GNU screen?

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2 Answers 2

If you want to use zmodem you have to set the zmodem option to pass, if your screen session is already running, press CTRL+A : and just enter zmodem pass . To send the data just use the sz command from the lrzsz package.

If you want to receive data via screen you have to set the value to catch.

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the best way to pass a file through xmodem is to use 'sx'. In debian this application is part of 'lrzsz' package.

In debian:

apt-get install screen lrzsz

screen /dev/ttyUSB0 115200

Then press Ctrl-A followed by : and type:

exec !! sx yourbinary.bin

This will send the file to ttyUSB0 over xmodem protocol

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