I have some tables in my postgres database, and a few of them inherit from each other. For example: CREATE TABLE parent_table(parent_table_id SERIAL PRIMARY KEY, my_col1 VARCHAR(16) NOT NULL, my_timestamp TIMESTAMP WITH TIME ZONE NOT NULL); CREATE TABLE child_table() INHERITS (parent_table); CREATE TABLE step_child_tab...
Ok, so I have 3 devices. an AVR Butterfly microcontroller, set up with USART A Bifferboard, running Debian, using a custom made program for serial. A Desktop machine running Br@y's. So I'm trying to make the Bifferboard send serial to the AVR, But the AVR never recieves the signal, (We've checked the wires) But if i connect the AVR to ...
I know that I can use e.g. pySerial to talk to serial devices, but what if I don't have a device right now but still need to write a client for it? How can I write a "virtual serial device" in Python and have pySerial talk to it, like I would, say, run a local web server? Maybe I'm just not searching well, but I've been unable to find an...
Hello, I have a database where everything is linked with foreign keys, so the Postgres knows exactly how the database is layed out.. Well, Lets say I have Table1 and Table2. Table1 has 3 fields. RID, table2_rid,data So table1.table2_rid references table2.RID and this is expressed with a foreign key. In both the RID field is the prima...
Occasionally we get this error when communicating between my motion control software and a plasma cutting torch. What the serial link is being used for is a one time setup of cutting information before the cutting begins. I am using VB6 and MSComm for this. I know the port itself has lunched because after it occurs other serial comm sof...
I have a very simple python script that uses pySerial to send data over the serial port to my arduino. When I execute this line-by-line in the python shell, it works just fine, but when I put it in a ".py" file, and try to run it, nothing happens. Though the Serial lights on my UART do flash. So something is getting through, but it's ...
I need to use a unique ID for an Android app and I thought the serial number for the device would be a good candidate. How do I retrieve the serial number of an Android device in my app ? ...
Our clients must pay a monthly Fee... if they don't, what is the best way to block the asp.net software usage? Note: The application runs on the client own server, its not a SaaS app... My ideas are: Idea: Host a Web Service on the internet that the application will use to know if the client can use the software. Issue 1 - What happen ...
hey folks how to get motherboard id or serial number ? is there any example or articles o try to get ? thanks in advance ...
What is the proper way to get a list of all available serial ports/devices on a Linux system? In other words, when I iterate over all devices in /dev/, how do I tell which ones are serial ports in the classic way, i.e. those usually supporting baud rates and RTS/CTS flow control? The solution would be coded in C. I ask because I am us...
Hi Geeks, I am planning to use PIC18F6*** serial microntroller for my project serial-ethernet converter. Once I will put my hex code in PIC micro-controller for send recieve serial port data I will use the windows hyper-terminal and for checking the ethernet data is there any application in windows? If my question is not clear I am re...
How do I send and receive via USB in C#? And what about Serial and LPT? ...
Are there any known problems with using a serial port set for 8 data bits, 1 stop bit and even parity, under Windows XP? ...
My brain is fried, so I thought I would pass this one to the community. When sending 1 character to my embedded system, it consistently thinks it receives 2 characters. The first received character seems to map to the transmitted character (in some unkown way) and the second received character is always 0xff Here is what I observed: T...
I am trying to dial a phone number from php (i have a client list in a database, and thought i could use it to ring them when i click on their name here is my code, it doesn't seem to work. I can hear the phone line click, but it doesn't seem to dial. maybe i am missing some command that needs to be sent prior to atdt? $device = "COM4"...
Hi, all Currently I am doing a project involves a bluetooth communication setup between a PDA and a small embedded device. This small embedded device can only be communicated with a virtual serial port over a bluetooth link. The PDA is the ipaq running with windows mobile 6, and I am using c#. I had done a program which can communicat...
I have been researching various third party libraries and approaches to low latency serial communications in .Net. I've read enough that I have now come full circle and know as little as I did when I started due to the variety of conflicting opinions. For example, the functionality in the Framework was ruled out due to some convincing a...
Hello everyone So i found out how to connect the arduino to my java program. But using the seriel connections dosent give any useful data back, its either in the wrong format, or just sends it as a box. I've looked at the related questions posted early in here, but none of the tips seems to help. So does anyone know how to send the data...
Right now I am using an arduino to send data from an analog sensor to COM4. I am trying to make a python script that continuously monitors that data and looks for a certain parameter. I tried something like this but it isn't alerting me correctly import serial from Tkinter import * import tkMessageBox port = "COM4" ser = serial.Serial...
Is there any command, which can used to retrieve USB serial number using cmd on windows? ...