473,830 Members | 2,154 Online
Bytes | Software Development & Data Engineering Community
+ Post

Home Posts Topics Members FAQ

C program embedded in PHP to read the serial port

6 New Member
I wrote a C program that is successfully able to read and write from the serial port.
When the program is run in shell or terminal on linux it can read and write data to the micro controller.
However when the program is embedded in PHP <?php echo exec("./send toserial.out"); ?> it is unable to send information to the micro controller.
I have tried other programs embedded in PHP, like a C program that can read and write to a file and that works just fine.

I would really appreciate any help on this matter. Thank you
Apr 1 '09 #1
1 2125
poisonvm
6 New Member
Hello guys, i figured out the solution to this, and i have seen a couple of forums with this problem.
My solution was to do this chmod 777 /dev/ttyUSB0.
I believe this would not be secure but it works.
Cheers
Apr 4 '09 #2

Sign in to post your reply or Sign up for a free account.

Similar topics

1
2476
by: OZ | last post by:
the serproxy claim itself a multi-thread proxy thing. I have sent email to write the original writer and there is no replay after 3 weeks. my configuration and setting are good. http://www.lspace.nildram.co.uk/freeware.html I installed it in rh 9.0 I found it is single user only.
5
4412
by: Confused User | last post by:
I am working on device that utilizes a Motorola 68HC16 microcontroller. I am using an old unsupported piece of crap Whitesmith's / Intermetrics / Tasking compiler. The embedded compiler business was quite insestual for while wasn't it? I need to write putchar so that printf can function properly. Anyway, the compiler comes with just a shell of a putchar routine. It literally returns the character you passed to it and nothing else. That is...
1
2553
by: kiran | last post by:
Hi all, I have a problem to communicate with serial port(COM3:). I am able to open the handle but cannot send any data. 1. I connected my motoroala handset to PC through datacable. 2. I installed valid driver to detec the motorla(V400) handset 3. I tested the handset through Hypertermal and succssfully sending any data. 4. I opened the Control Panel -> Phone and Model window and clicked the modem tab and I saw that the Motorola...
0
2064
by: Tom | last post by:
I am new to hardware programming. I need to write a program for reading data from Card Reader which connects to the PC windows 2000/XP OS through Interfacing The Serial / RS-232 Port / USB / Bluetooth / Infrared. May I ask does serial port equal to com port? The program needs to read and write data of the smart card which places on top of the card reader. The card reader has serveral models, they support
6
3135
by: Ken | last post by:
When running a program in the debugger, what would cause it to crash without any error messages? I get "The program has exited with code 0 (0x0)". The program is a MDI app with threading for several serial ports. It only crashes when data is being received on one or more of the serial ports. Could someone please give me some ideas about what would cause a program to terminate in this way? Thanks....
6
3594
by: Casey Bralla | last post by:
I'd like to read ASCII data from a serial port, but (once again) I'm having trouble getting started. (Can't seem to find the basic level of docs to get going <sigh>) I'd like to use only standard "built-in" modules if possible. Could somebody offer a simple code-snippet to get me started reading from a serial port? Thanks!
8
16393
by: Vivek Menon | last post by:
Hi, I am using a C program to write/read from a serial port. The writing part is working perfectly fine. However, I am not able to read the values correctly and display them. To debug this issue I am also seeing the values on minicom. Now I have used fcntl() function and then read refp = fcntl(fd, F_SETFL, 0); res = read(fd,buf,1024); /* Read the value sent on the serial port buf=0; /* set end of string, so we can printf */...
3
2488
by: John Dann | last post by:
Trying to learn Python here, but getting tangled up with variable scope across functions, modules etc and associated problems. Can anyone advise please? Learning project is a GUI-based (wxPython) Python program that needs to access external data across a serial port. The first thing that I need the program to do when it starts up is to check that it can see the serial port, the first step of which is to check that it can import the...
0
9781
marktang
by: marktang | last post by:
ONU (Optical Network Unit) is one of the key components for providing high-speed Internet services. Its primary function is to act as an endpoint device located at the user's premises. However, people are often confused as to whether an ONU can Work As a Router. In this blog post, we’ll explore What is ONU, What Is Router, ONU & Router’s main usage, and What is the difference between ONU and Router. Let’s take a closer look ! Part I. Meaning of...
0
9641
by: Hystou | last post by:
Most computers default to English, but sometimes we require a different language, especially when relocating. Forgot to request a specific language before your computer shipped? No problem! You can effortlessly switch the default language on Windows 10 without reinstalling. I'll walk you through it. First, let's disable language synchronization. With a Microsoft account, language settings sync across devices. To prevent any complications,...
1
10522
by: Hystou | last post by:
Overview: Windows 11 and 10 have less user interface control over operating system update behaviour than previous versions of Windows. In Windows 11 and 10, there is no way to turn off the Windows Update option using the Control Panel or Settings app; it automatically checks for updates and installs any it finds, whether you like it or not. For most users, this new feature is actually very convenient. If you want to control the update process,...
1
7740
isladogs
by: isladogs | last post by:
The next Access Europe User Group meeting will be on Wednesday 1 May 2024 starting at 18:00 UK time (6PM UTC+1) and finishing by 19:30 (7.30PM). In this session, we are pleased to welcome a new presenter, Adolph Dupré who will be discussing some powerful techniques for using class modules. He will explain when you may want to use classes instead of User Defined Types (UDT). For example, to manage the data in unbound forms. Adolph will...
0
6944
by: conductexam | last post by:
I have .net C# application in which I am extracting data from word file and save it in database particularly. To store word all data as it is I am converting the whole word file firstly in HTML and then checking html paragraph one by one. At the time of converting from word file to html my equations which are in the word document file was convert into image. Globals.ThisAddIn.Application.ActiveDocument.Select();...
0
5615
by: TSSRALBI | last post by:
Hello I'm a network technician in training and I need your help. I am currently learning how to create and manage the different types of VPNs and I have a question about LAN-to-LAN VPNs. The last exercise I practiced was to create a LAN-to-LAN VPN between two Pfsense firewalls, by using IPSEC protocols. I succeeded, with both firewalls in the same network. But I'm wondering if it's possible to do the same thing, with 2 Pfsense firewalls...
0
5777
by: adsilva | last post by:
A Windows Forms form does not have the event Unload, like VB6. What one acts like?
1
4408
by: 6302768590 | last post by:
Hai team i want code for transfer the data from one system to another through IP address by using C# our system has to for every 5mins then we have to update the data what the data is updated we have to send another system
2
3956
muto222
by: muto222 | last post by:
How can i add a mobile payment intergratation into php mysql website.

By using Bytes.com and it's services, you agree to our Privacy Policy and Terms of Use.

To disable or enable advertisements and analytics tracking please visit the manage ads & tracking page.