I'm new to Linux (Ubuntu 16.04), and very new to BASH scripting. I have a Numato 8-channel USB GPIO device, which is a DAQ that appears in the system as a serial port. In Linux it appears as ttyACM0. I can easily manipulate a GPO with, for example:
Code:
echo "gpio set 7" > /dev/ttyACM0
...followed by a carriage return:
echo -e '\r' > /dev/ttyACM0
But if I want to read a GPI, or one of the ADCs, I need to be able to read lines of data, (separated by carriage returns), sent back by the device...and save the information as a variable. So, for example I can send a request:
I would then need to do two "read lines". The first would return an echo of the command I sent. The second would return the value of the ADC. I've not been able to figure out how to do these line reads. Does anyone know a simple command or series of commands to retrieve this serial information?
[I'm successfully doing automation with these devices with PowerShell under Windows 7, but I'd love to do the same from Linux machines]
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Last edited by RudiC; 11-02-2016 at 03:49 PM..
Reason: Added CODE tags.
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Read line from serial device with BASH
