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4
votes
1answer
166 views

Reading from serial port in the simplest way?

I have a TrueRNG USB-based hardware RNG, and I am trying to read its output on Mac OS X 10.9.2. I need just one-way communication. The device says that it appears as a "CDC Virtual Serial Port", and ...
3
votes
1answer
374 views

How to send data from serial port over wifi?

I have microcontroller device which reads data from sensors and sends it via Serial to USB converter (ftdi232 cable). This Serial to USB converter is connected to ARMv7 mini-computer - CuBox with ...
2
votes
1answer
62 views

How to enable/disable a serial port?

I need to disable and then enable a serial port for testing purposes on a Java program. Since the man page of setserial is stating: "Using UART type none will disable the port.", I use sudo setserial ...
2
votes
1answer
151 views

Sun type 5 keyboard via serial port replicator

I'm running Ubuntu 12.04 on an HP G60 laptop with a Targus serial port replicator to USB and a custom cable between the keyboard and the replicator I ran modprobe sunkbd. Nothing works for the Type ...
1
vote
1answer
34 views

Serial communication not working in both directions

I am working with a SOM mounted on a carrier board running Ubuntu 14.04 with the generic 3.13 kernel. While testing out the peripherals, I hit a problem with serial communication. Basically, I can ...
1
vote
1answer
463 views

Setting up tty ports on Beaglebone Black with Angstrom linux

I'm using a Beaglebone Black running the Angstrom v2012.12 build that came pre-loaded. I want to be able to connect another device to a serial port via the UART connections on the GPIO headers. The ...
0
votes
1answer
261 views

Printing on serial printer via cups

I'm trying to set up my serial printer with cups, but I can't see any serial port in cups config page nor via lpinfo -v. I have serial port at /dev/ttyAMA0. I was trying to set proper permissions for ...
0
votes
1answer
150 views

Monitor com port with strace

I have done small application in Java that writes to com port two strings -'dddd' and 'ffff'. I decided to look how it writes with thelp of strace -s9999 -o serialtrace.log -eread,write,ioctl And I ...
2
votes
0answers
15 views

Possibile sources of 5us-20us latency gap when sending long block of of serial data to tty device?

I have a trivial C program that just sends a large block of data out the serial port at a fast baud rate. When looking at the bits actually coming out of the port, I see that there is a almost always ...
2
votes
0answers
103 views

Strange behaviour using serial port and bluetooth

I'm trying to connect via serial port, a wearable device to a processing IDE using a Bluetooth connection on Linux Mint. I've got the connection part working, but the problem is that the connection is ...
1
vote
0answers
28 views

How to setup ssh over USB on an embedded linux device?

I have an embedded linux device with an ARM processor. I am connecting to it over a USB port using minicom. What should I do to "ssh" into the device through the USB connection? I want to setup ...
1
vote
0answers
27 views

Triggering a server to shutdown in receiving a signal via serial port (RS232)

I'm a fresh graduate (Electronics & Commn) and want to start my career in linux administration. I'm using a Ubunutu 14.04 server machine for R&D (with ups). Now my scenario is whenever main ...
1
vote
0answers
23 views

Trying to load file to device via serial to USB adapter

So I have this device, and it's pretty old. It only has a serial interface. I have a cord that connects to it, and then to the serial port of a computer. This cord is plugged into a serial to usb ...
1
vote
0answers
45 views

Cygwin serial tty device for high-numbered COM ports

My hardware enumerates as COM125 on the device manager (CDC-ACM class). But, I can't find it under /dev/tty* listing. Does cygwin have a limitation on CDC-ACM class of com ports or numbers greater ...
1
vote
0answers
1k views

Connecting to a serial port with VMWare ESXi and Ubuntu

Using VMWare ESXi 5.0.0, having a guest OS Ubuntu 12.04.3, upgraded to the date 05 january 2014. I've added "Serial port 1" to the Ubuntu 12.04 guest OS (let's call it "MyUbuntuPC"). Serial port 1 is ...
1
vote
0answers
115 views

Kicking a process from a USB-Serial port

I have a application which is using the USB-serial port. Occasionally on shutdown the port cannot be opened by another instance of the program, and up until now the only way I know of the program ...
1
vote
0answers
151 views

Serial Communication on DD-WRT stty config not sticking

I am attempting to control a serial device (in this case a projector) using a Fonera router with DD-WRT on it. I've got the serial port on the fonera wired through a level shifter and then into my ...
1
vote
0answers
191 views

Where are the logs for the serial port (power save modes, specifically)

I'm running a system with Ubuntu 10.10 (pretty old, I know, but it has to be that one), with all its packages updated to the latest version supported (the distribution is not supported anymore so, to ...
0
votes
0answers
49 views

How to create virtual serial port?

Is there a common way (tool?) to create two serial ports through physical /dev/ttyS0? I have to simultaneously use both to communicate. I've seen 'Socat' but I can't understand how can I use it just ...
0
votes
0answers
27 views

Virtual serial port problem

Background: I've to test external GSM module, connected to PC with serial port. Since I'll have to either send messages both to do more, I need to create two virtual serial port (script provided by ...
0
votes
0answers
95 views

VT100 terminal emulation to use with a Java-based 8-bit computer emulator

I'm successfully using GNU Screen as serial terminal to "talk" to my Altair 8800 clone (http://altairclone.com/) using serial line. The command I use is: screen -istrip /dev/ttyUSB0 Screen does the ...
0
votes
0answers
44 views

How to install and configure USB to serial hub (8 serial ports)?

I have bought a USB to serial hub (8 serial ports) but I don't know how I can install it on my Debian server. On the box, they wrote 'Linux compatible'. What do I need to do to can use it?
0
votes
0answers
83 views

cat echoes to serial port

Connecting my Windows PC to a Linux system (Wheezy) via the serial port (RS232) basically works except one problem when sending a message from the the PC terminal the Linux system. The reception of ...
0
votes
0answers
118 views

Why can't I connect to my Linux bluetooth serial port?

I have a USB bluetooth dongle on a Linux 3.12.5 ARM system. I've been attempting to make a bluetooth serial connection from my android phone to the USB dongle on Linux. I've referenced this question ...
0
votes
0answers
29 views

Can slattach control a serial WiFi device?

I have a Wi-Fi device which is driven by AT commands over a USB-Serial connection. I am able to successfully make a serial connection to the device and set the SSID, PSK, obtain an IP address, and do ...
0
votes
0answers
46 views

HP-UX itanium cannot log in or connect

I just had this problem where suddenly I cannot ssh into my HP-UX itanium, but still can ping. Few hours before that, I was still able to so. I tried to force reboot (Pressing the power button). Then, ...
0
votes
0answers
44 views

What's up with “Error in lockf()” just for one particular user?

We're running a Java manufacturing/equipment control application on Solaris. Equipment control is done via the serial port on the SunRay terminal at the user station. The interesting thing is that ...
0
votes
0answers
192 views

rs232 to usb not working

I also asked this question on AskUbuntu but there nobody comments on it I have a konig rs232 serial to usb adapter (no FTDI chip), but when I try to connect to a cisco switch/router (via Putty, ...
0
votes
0answers
144 views

Serial Over Lan redirection stops at OS boot

I'm trying to create a monitoring system for a remote machine using an IPMI Serial Over Lan (SOL) console. The remote OS is RHEL 6, the mobo manufacturer is Supermicro. I've successfully enabled SOL ...
0
votes
0answers
209 views

lrzsz doesn't working in my Mac OS X

When I was used secureCRT in Windows, I often used sz and rz to transfer files between my linux server and client machine. But I can't use that way in iterm2 in MacOS X. lrzsz package has installed ...
0
votes
0answers
323 views

Trouble communicating with FTDI FT245RL on ttyUSB0. works fine on Win7x64

I purchased a Sainsmart 4 channel USB relay board which seems to be based on a FTDI FT245RL chip. I should be easy enough to use. when you plug it in it appears as a serial port (VCP). You send it ...