473,551 Members | 2,722 Online
Bytes | Software Development & Data Engineering Community
+ Post

Home Posts Topics Members FAQ

Service Wont Start Programatically (ACCESS DENIED)


I have written two windows services:
- service A does some crunching of local data files and uploads them to
a central processing computer via http.
- service B monitors a manifest file on a webserver to see if service A
needs to be updated.

What service B does if it sees their is an update for service A is to
download a new copy of the service A executable, stop service A,
replace the executable with the new copy, and start service B back up.
Everything works fine until that very last step. I can programatically
stop and start the service just fine, if the service A executable was
placed their manually. If service B downloads and replaces the service
A executable, it can't then restart service A. When starting service A
it dies with

System.InvalidO perationExcepti on: Cannot start service Service A on
computer '.'. ---System.Componen tModel.Win32Exc eption: Access is
denied
--- End of inner exception stack trace ---
at System.ServiceP rocess.ServiceC ontroller.Start (String[] args)
at System.ServiceP rocess.ServiceC ontroller.Start ()
at namespace.Servi ceB.t_update_El apsed(Object sender,
ElapsedEventArg s e)

I am assuming this is just a permissions issue somwhere. Service A and
Service B are both installed with ServiceProcessI nstaller.Accoun t =
ServiceAccount. LocalSystem and Username and Password = null;

Any thoughts? Thanks in advance for your help, i'm a general newb at
windows application development.

Jan 14 '07 #1
4 21690
If service B does nothing more than what you have said then I would suggest
that having that functionality as a seperate service is overkill.

A solid technique is to have service A monitor the need for an upgrade aand
download the upgraded executable as a temporary file. When it has completed
this step, have it use Process.Start to spawn a 'stub' program.

The stub program stops service A, replaces the executable with the
downloaded (upgraded) version and starts service A. Because the 'stub'
program is spawned by service A, it runs under thae same account
(LocalSystem) and so, for the short period of time involved, it needs to
impersonate an account with the necessary permissions.

This means that the 'stub' program only runs when it needs to and you don't
have the overhead of running a extra service.

The logic for the 'stub' program is relatively simple:

static void Main()
{

// Start impersonating a priviledged account

// Stop Service A

// Replace the executable for Service A

// Start Service A

// Cease impersonation

}
<ca****@carsone vans.comwrote in message
news:11******** *************@l 53g2000cwa.goog legroups.com...
>
I have written two windows services:
- service A does some crunching of local data files and uploads them to
a central processing computer via http.
- service B monitors a manifest file on a webserver to see if service A
needs to be updated.

What service B does if it sees their is an update for service A is to
download a new copy of the service A executable, stop service A,
replace the executable with the new copy, and start service B back up.
Everything works fine until that very last step. I can programatically
stop and start the service just fine, if the service A executable was
placed their manually. If service B downloads and replaces the service
A executable, it can't then restart service A. When starting service A
it dies with

System.InvalidO perationExcepti on: Cannot start service Service A on
computer '.'. ---System.Componen tModel.Win32Exc eption: Access is
denied
--- End of inner exception stack trace ---
at System.ServiceP rocess.ServiceC ontroller.Start (String[] args)
at System.ServiceP rocess.ServiceC ontroller.Start ()
at namespace.Servi ceB.t_update_El apsed(Object sender,
ElapsedEventArg s e)

I am assuming this is just a permissions issue somwhere. Service A and
Service B are both installed with ServiceProcessI nstaller.Accoun t =
ServiceAccount. LocalSystem and Username and Password = null;

Any thoughts? Thanks in advance for your help, i'm a general newb at
windows application development.

Jan 14 '07 #2
I have implemented Stephany's suggestion, at least I think I have. :)

I now have a single process, Service A, and a "controller " executeable.
The controller code looks like this...

if (File.Exists(s_ downloadFile))
{
alterProcessSta tus("stop");
File.Replace(s_ downloadFile, s_installFile,
s_backupFile);
alterProcessSta tus("start");
}

Where alterProcessSta tus does...

ServiceControll er sc = new ServiceControll er("Service A");
sc.Refresh();
/** all my logic to handle stopping/starting the service
* depending on the process current state along with some
* sc.WaitForStatu s() just to make sure it works.
**/

Service A now handles downloading new copies of "itself" when updates
are ready. When an update is successfully downloaded I kick off a
System.Diagnost ic.Process.Star t(s_controllerP ath); and it does manage
to stop the service and replace the ServiceA.exe with the downloaded
version, however when starting the function I still get..

System.InvalidO perationExcepti on: Cannot start service Service A on
computer '.'. ---System.Componen tModel.Win32Exc eption: Access is
denied
--- End of inner exception stack trace ---
at System.ServiceP rocess.ServiceC ontroller.Start (String[] args)
at System.ServiceP rocess.ServiceC ontroller.Start ()
at Controller.Prog ram.alterProces sStatus(String arg)
at Controller.Prog ram.Main(String[] args)

Trying to use the Start in the Service Manager gives me the same Access
Denied, the event viewer said "The Service A service failed to start
due to the following error: Access is denied."

I created a rollback function in Controller and it is able to copy the
files back to how they were before the update and restart the process.
This got me thinking, it's obviously not the controllers fault since it
is able to manipulate the service and overwrite the files just fine. If
I manually put my downloaded file in the download location (instead of
letting the service download it) and then let the service run (it
doesn't download a new file if there is already a patch file waiting)
it is able to spawn the process to update itself just fine.

It would seem this is more about how the file is being delivered, not
how the update happens. So, maybe the way I go about downloading a new
file is the issue...

HttpWebRequest webrequest =
(HttpWebRequest )WebRequest.Cre ate(uri_newFile );
WebResponse wr_response = webrequest.GetR esponse();
StreamReader sr_response = new
StreamReader(wr _response.GetRe sponseStream()) ;
StreamWriter sw_out = new StreamWriter(ne w FileStream(s_do wnloadFile,
FileMode.Create ));
sw_out.Write(sr _response.ReadT oEnd());
wr_response.Clo se();
sr_response.Clo se();
sw_out.Close();

There is no difference byte wise between this code downloading a file
from my webserver and me placing the file directly in the
s_downloadFile location. This still leads me to believe it's all about
the permissions on the downloaded file. Anyone have any clues? What
tools are there to compare the permissions between two files on XP?

Stephany Young wrote:
If service B does nothing more than what you have said then I would suggest
that having that functionality as a seperate service is overkill.

A solid technique is to have service A monitor the need for an upgrade aand
download the upgraded executable as a temporary file. When it has completed
this step, have it use Process.Start to spawn a 'stub' program.

The stub program stops service A, replaces the executable with the
downloaded (upgraded) version and starts service A. Because the 'stub'
program is spawned by service A, it runs under thae same account
(LocalSystem) and so, for the short period of time involved, it needs to
impersonate an account with the necessary permissions.

This means that the 'stub' program only runs when it needs to and you don't
have the overhead of running a extra service.

The logic for the 'stub' program is relatively simple:

static void Main()
{

// Start impersonating a priviledged account

// Stop Service A

// Replace the executable for Service A

// Start Service A

// Cease impersonation

}
<ca****@carsone vans.comwrote in message
news:11******** *************@l 53g2000cwa.goog legroups.com...

I have written two windows services:
- service A does some crunching of local data files and uploads them to
a central processing computer via http.
- service B monitors a manifest file on a webserver to see if service A
needs to be updated.

What service B does if it sees their is an update for service A is to
download a new copy of the service A executable, stop service A,
replace the executable with the new copy, and start service B back up.
Everything works fine until that very last step. I can programatically
stop and start the service just fine, if the service A executable was
placed their manually. If service B downloads and replaces the service
A executable, it can't then restart service A. When starting service A
it dies with

System.InvalidO perationExcepti on: Cannot start service Service A on
computer '.'. ---System.Componen tModel.Win32Exc eption: Access is
denied
--- End of inner exception stack trace ---
at System.ServiceP rocess.ServiceC ontroller.Start (String[] args)
at System.ServiceP rocess.ServiceC ontroller.Start ()
at namespace.Servi ceB.t_update_El apsed(Object sender,
ElapsedEventArg s e)

I am assuming this is just a permissions issue somwhere. Service A and
Service B are both installed with ServiceProcessI nstaller.Accoun t =
ServiceAccount. LocalSystem and Username and Password = null;

Any thoughts? Thanks in advance for your help, i'm a general newb at
windows application development.
Jan 14 '07 #3
Yes. You could very well be right.

It might be possible that your download 'mechanism' is not 'releasing' the
file correctly and that could be causing the exception.

Although the StreamWriter.Cl ose method also (is supposed to) closes the
underlying stream, I have heard tell of situations where files are not
'released properly. (I haven't experienced it myself so I don't know what
the circumstances are.)

A couple of things to try:

Change the statement:

StreamWriter sw_out = new StreamWriter(ne w FileStream(s_do wnloadFile,
FileMode.Create ));

to:

FileStream fs = new FileStream(s_do wnloadFile, FileMode.Create );
StreamWriter sw_out = new StreamWriter(fs );

and add:

fs.Close();

after:

sw_out.Close();

You might also need to add one or both of:

sw_out.Dispose( );
fs.Dispose();

or:

You could try using the WebClient class to do the download, something
like:

WebClient webclient = new WebClient();

// Download the Web resource and save it using the filesystem filename.
webclient.Downl oadFile(uri_new File, s_downloadFile) ;

webclient.Dispo se();

// Note the explicit dispose

or:

using (WebClient webclient = new WebClient())
{
// Download the Web resource and save it using the filesystem
filename.
webclient.Downl oadFile(uri_new File, s_downloadFile) ;
}

The 'using' keyword automatically disposes of the 'using' object
(webclient) at the end of the block.
<ca****@carsone vans.comwrote in message
news:11******** **************@ 51g2000cwl.goog legroups.com...
>I have implemented Stephany's suggestion, at least I think I have. :)

I now have a single process, Service A, and a "controller " executeable.
The controller code looks like this...

if (File.Exists(s_ downloadFile))
{
alterProcessSta tus("stop");
File.Replace(s_ downloadFile, s_installFile,
s_backupFile);
alterProcessSta tus("start");
}

Where alterProcessSta tus does...

ServiceControll er sc = new ServiceControll er("Service A");
sc.Refresh();
/** all my logic to handle stopping/starting the service
* depending on the process current state along with some
* sc.WaitForStatu s() just to make sure it works.
**/

Service A now handles downloading new copies of "itself" when updates
are ready. When an update is successfully downloaded I kick off a
System.Diagnost ic.Process.Star t(s_controllerP ath); and it does manage
to stop the service and replace the ServiceA.exe with the downloaded
version, however when starting the function I still get..

System.InvalidO perationExcepti on: Cannot start service Service A on
computer '.'. ---System.Componen tModel.Win32Exc eption: Access is
denied
--- End of inner exception stack trace ---
at System.ServiceP rocess.ServiceC ontroller.Start (String[] args)
at System.ServiceP rocess.ServiceC ontroller.Start ()
at Controller.Prog ram.alterProces sStatus(String arg)
at Controller.Prog ram.Main(String[] args)

Trying to use the Start in the Service Manager gives me the same Access
Denied, the event viewer said "The Service A service failed to start
due to the following error: Access is denied."

I created a rollback function in Controller and it is able to copy the
files back to how they were before the update and restart the process.
This got me thinking, it's obviously not the controllers fault since it
is able to manipulate the service and overwrite the files just fine. If
I manually put my downloaded file in the download location (instead of
letting the service download it) and then let the service run (it
doesn't download a new file if there is already a patch file waiting)
it is able to spawn the process to update itself just fine.

It would seem this is more about how the file is being delivered, not
how the update happens. So, maybe the way I go about downloading a new
file is the issue...

HttpWebRequest webrequest =
(HttpWebRequest )WebRequest.Cre ate(uri_newFile );
WebResponse wr_response = webrequest.GetR esponse();
StreamReader sr_response = new
StreamReader(wr _response.GetRe sponseStream()) ;
StreamWriter sw_out = new StreamWriter(ne w FileStream(s_do wnloadFile,
FileMode.Create ));
sw_out.Write(sr _response.ReadT oEnd());
wr_response.Clo se();
sr_response.Clo se();
sw_out.Close();

There is no difference byte wise between this code downloading a file
from my webserver and me placing the file directly in the
s_downloadFile location. This still leads me to believe it's all about
the permissions on the downloaded file. Anyone have any clues? What
tools are there to compare the permissions between two files on XP?

Stephany Young wrote:
>If service B does nothing more than what you have said then I would
suggest
that having that functionality as a seperate service is overkill.

A solid technique is to have service A monitor the need for an upgrade
aand
download the upgraded executable as a temporary file. When it has
completed
this step, have it use Process.Start to spawn a 'stub' program.

The stub program stops service A, replaces the executable with the
downloaded (upgraded) version and starts service A. Because the 'stub'
program is spawned by service A, it runs under thae same account
(LocalSystem ) and so, for the short period of time involved, it needs to
impersonate an account with the necessary permissions.

This means that the 'stub' program only runs when it needs to and you
don't
have the overhead of running a extra service.

The logic for the 'stub' program is relatively simple:

static void Main()
{

// Start impersonating a priviledged account

// Stop Service A

// Replace the executable for Service A

// Start Service A

// Cease impersonation

}
<ca****@carson evans.comwrote in message
news:11******* **************@ l53g2000cwa.goo glegroups.com.. .
>
I have written two windows services:
- service A does some crunching of local data files and uploads them to
a central processing computer via http.
- service B monitors a manifest file on a webserver to see if service A
needs to be updated.

What service B does if it sees their is an update for service A is to
download a new copy of the service A executable, stop service A,
replace the executable with the new copy, and start service B back up.
Everything works fine until that very last step. I can programatically
stop and start the service just fine, if the service A executable was
placed their manually. If service B downloads and replaces the service
A executable, it can't then restart service A. When starting service A
it dies with

System.InvalidO perationExcepti on: Cannot start service Service A on
computer '.'. ---System.Componen tModel.Win32Exc eption: Access is
denied
--- End of inner exception stack trace ---
at System.ServiceP rocess.ServiceC ontroller.Start (String[] args)
at System.ServiceP rocess.ServiceC ontroller.Start ()
at namespace.Servi ceB.t_update_El apsed(Object sender,
ElapsedEventArg s e)

I am assuming this is just a permissions issue somwhere. Service A and
Service B are both installed with ServiceProcessI nstaller.Accoun t =
ServiceAccount. LocalSystem and Username and Password = null;

Any thoughts? Thanks in advance for your help, i'm a general newb at
windows application development.

Jan 14 '07 #4

Thank you very much, Stephany.

Swtiching my code over the WebClient.Downl oadFile approach made it all
work. I still don't see what in my code was any different than what
WebClient.Downl oadFile does, but hey, it works and my code is cleaner
to boot.

Thanks again!
Stephany Young wrote:
Yes. You could very well be right.

It might be possible that your download 'mechanism' is not 'releasing' the
file correctly and that could be causing the exception.

Although the StreamWriter.Cl ose method also (is supposed to) closes the
underlying stream, I have heard tell of situations where files are not
'released properly. (I haven't experienced it myself so I don't know what
the circumstances are.)

A couple of things to try:

Change the statement:

StreamWriter sw_out = new StreamWriter(ne w FileStream(s_do wnloadFile,
FileMode.Create ));

to:

FileStream fs = new FileStream(s_do wnloadFile, FileMode.Create );
StreamWriter sw_out = new StreamWriter(fs );

and add:

fs.Close();

after:

sw_out.Close();

You might also need to add one or both of:

sw_out.Dispose( );
fs.Dispose();

or:

You could try using the WebClient class to do the download, something
like:

WebClient webclient = new WebClient();

// Download the Web resource and save it using the filesystem filename.
webclient.Downl oadFile(uri_new File, s_downloadFile) ;

webclient.Dispo se();

// Note the explicit dispose

or:

using (WebClient webclient = new WebClient())
{
// Download the Web resource and save it using the filesystem
filename.
webclient.Downl oadFile(uri_new File, s_downloadFile) ;
}

The 'using' keyword automatically disposes of the 'using' object
(webclient) at the end of the block.
<ca****@carsone vans.comwrote in message
news:11******** **************@ 51g2000cwl.goog legroups.com...
I have implemented Stephany's suggestion, at least I think I have. :)

I now have a single process, Service A, and a "controller " executeable.
The controller code looks like this...

if (File.Exists(s_ downloadFile))
{
alterProcessSta tus("stop");
File.Replace(s_ downloadFile, s_installFile,
s_backupFile);
alterProcessSta tus("start");
}

Where alterProcessSta tus does...

ServiceControll er sc = new ServiceControll er("Service A");
sc.Refresh();
/** all my logic to handle stopping/starting the service
* depending on the process current state along with some
* sc.WaitForStatu s() just to make sure it works.
**/

Service A now handles downloading new copies of "itself" when updates
are ready. When an update is successfully downloaded I kick off a
System.Diagnost ic.Process.Star t(s_controllerP ath); and it does manage
to stop the service and replace the ServiceA.exe with the downloaded
version, however when starting the function I still get..

System.InvalidO perationExcepti on: Cannot start service Service A on
computer '.'. ---System.Componen tModel.Win32Exc eption: Access is
denied
--- End of inner exception stack trace ---
at System.ServiceP rocess.ServiceC ontroller.Start (String[] args)
at System.ServiceP rocess.ServiceC ontroller.Start ()
at Controller.Prog ram.alterProces sStatus(String arg)
at Controller.Prog ram.Main(String[] args)

Trying to use the Start in the Service Manager gives me the same Access
Denied, the event viewer said "The Service A service failed to start
due to the following error: Access is denied."

I created a rollback function in Controller and it is able to copy the
files back to how they were before the update and restart the process.
This got me thinking, it's obviously not the controllers fault since it
is able to manipulate the service and overwrite the files just fine. If
I manually put my downloaded file in the download location (instead of
letting the service download it) and then let the service run (it
doesn't download a new file if there is already a patch file waiting)
it is able to spawn the process to update itself just fine.

It would seem this is more about how the file is being delivered, not
how the update happens. So, maybe the way I go about downloading a new
file is the issue...

HttpWebRequest webrequest =
(HttpWebRequest )WebRequest.Cre ate(uri_newFile );
WebResponse wr_response = webrequest.GetR esponse();
StreamReader sr_response = new
StreamReader(wr _response.GetRe sponseStream()) ;
StreamWriter sw_out = new StreamWriter(ne w FileStream(s_do wnloadFile,
FileMode.Create ));
sw_out.Write(sr _response.ReadT oEnd());
wr_response.Clo se();
sr_response.Clo se();
sw_out.Close();

There is no difference byte wise between this code downloading a file
from my webserver and me placing the file directly in the
s_downloadFile location. This still leads me to believe it's all about
the permissions on the downloaded file. Anyone have any clues? What
tools are there to compare the permissions between two files on XP?

Stephany Young wrote:
If service B does nothing more than what you have said then I would
suggest
that having that functionality as a seperate service is overkill.

A solid technique is to have service A monitor the need for an upgrade
aand
download the upgraded executable as a temporary file. When it has
completed
this step, have it use Process.Start to spawn a 'stub' program.

The stub program stops service A, replaces the executable with the
downloaded (upgraded) version and starts service A. Because the 'stub'
program is spawned by service A, it runs under thae same account
(LocalSystem) and so, for the short period of time involved, it needs to
impersonate an account with the necessary permissions.

This means that the 'stub' program only runs when it needs to and you
don't
have the overhead of running a extra service.

The logic for the 'stub' program is relatively simple:

static void Main()
{

// Start impersonating a priviledged account

// Stop Service A

// Replace the executable for Service A

// Start Service A

// Cease impersonation

}
<ca****@carsone vans.comwrote in message
news:11******** *************@l 53g2000cwa.goog legroups.com...

I have written two windows services:
- service A does some crunching of local data files and uploads them to
a central processing computer via http.
- service B monitors a manifest file on a webserver to see if service A
needs to be updated.

What service B does if it sees their is an update for service A is to
download a new copy of the service A executable, stop service A,
replace the executable with the new copy, and start service B back up.
Everything works fine until that very last step. I can programatically
stop and start the service just fine, if the service A executable was
placed their manually. If service B downloads and replaces the service
A executable, it can't then restart service A. When starting service A
it dies with

System.InvalidO perationExcepti on: Cannot start service Service A on
computer '.'. ---System.Componen tModel.Win32Exc eption: Access is
denied
--- End of inner exception stack trace ---
at System.ServiceP rocess.ServiceC ontroller.Start (String[] args)
at System.ServiceP rocess.ServiceC ontroller.Start ()
at namespace.Servi ceB.t_update_El apsed(Object sender,
ElapsedEventArg s e)

I am assuming this is just a permissions issue somwhere. Service A and
Service B are both installed with ServiceProcessI nstaller.Accoun t =
ServiceAccount. LocalSystem and Username and Password = null;

Any thoughts? Thanks in advance for your help, i'm a general newb at
windows application development.
Jan 15 '07 #5

This thread has been closed and replies have been disabled. Please start a new discussion.

Similar topics

0
2060
by: adrian GREEMAN | last post by:
I am fairly much a beginner and have probably done something wrong but version 4.0.12 will not let me in. I have been using MySQL (via MySQL Front and PHPMyAdmin as interfaces usually) on a Windows ME PC with Apache, all just for learning databases, SQL and PHP. I learn slowly since I have to do a lot of other things but it has gone...
9
6309
by: | last post by:
Hi All, I have allready tried to ask a similar question , but got no answer until now. In the meantime, I found, that I cannot understand some thread-settings for the Main() function . If I use the attribute for the Main() function, I get "access denied error", if I use a ManagementEventWatcher to connect to the local machine to receive...
1
7368
by: Jason Gleason | last post by:
I am using the following method in a web service that utilizes the system.directoryservices namespace: public ArrayList GetAllAppPools(){ System.DirectoryServices.DirectoryEntry apppools = new DirectoryEntry("IIS://webserver/W3SVC/AppPools"); ArrayList appPoolNames = new ArrayList(); foreach(DirectoryEntry de in apppools.Children) {...
0
1253
by: Ron Weldy | last post by:
I've looked at just about everything at this point, and I'm still getting the "Error while trying to run project: Unable to start debugging on the web server. Access is denied." message when trying to debug on my remote server. I am an administrator and I have added ASPNET to the the Debugger Users... so I don't get it. Using Windows server...
2
7896
by: ad | last post by:
I have a virtual which is a web service. When I use the IP to get the web service, it return a access denied message: http://xxx.xxx.xxx.xxx/HealthService/Service.asmx but if I use local host, it is ok http://localhost/HealthService/Service.asmx I have set the virtual directory to allow anonymous. Why it still can't be accessed?
0
1438
by: Telos | last post by:
I'm trying to write a windows service which reads some emails from Exchange Server through WebDAV, using C#.NET 2.0. Everything works fine when testing, using a little Forms application to test all the backend classes. However, when I try to run the actual service it gets an access denied message when trying to get the emails. We have...
7
20413
by: =?Utf-8?B?ams=?= | last post by:
I am using System.Diagnostics.Process class to open a word document by call ing Process.Start("test.doc"). I am using C# as programming language. On some of the computers on running this code i get "Access is Denied" Win32Exception. What do i do to not generate this exception ? Any help highly appreciated, Thanks, Jay
1
1818
by: Rick | last post by:
I've migrated a web site from VS 2003 to VS 2005. After pushing the a Windows Server 2003 web server. The Framework 2.0 web site works when I go to test it. I'll start working on something else come back later and I start getting Access Denied errors on System.Data or System.Transaction, these files are set up as assemblies in the...
5
12557
by: DotNetDanny | last post by:
Hello Machine: Windows Vista Business, standalone machine (no domain). Installed an old classic ASP webapplication in IIS7, running under a new app.pool with 'NETWORK SERVICE' account (using existing app.pool gives same results). This webapplication tries to write to a log file. Used Process Monitor (from Sysinternals) for monitoring...
0
7492
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...
0
7768
Oralloy
by: Oralloy | last post by:
Hello folks, I am unable to find appropriate documentation on the type promotion of bit-fields when using the generalised comparison operator "<=>". The problem is that using the GNU compilers, it seems that the internal comparison operator "<=>" tries to promote arguments from unsigned to signed. This is as boiled down as I can make it. ...
1
7522
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...
0
7847
tracyyun
by: tracyyun | last post by:
Dear forum friends, With the development of smart home technology, a variety of wireless communication protocols have appeared on the market, such as Zigbee, Z-Wave, Wi-Fi, Bluetooth, etc. Each protocol has its own unique characteristics and advantages, but as a user who is planning to build a smart home system, I am a bit confused by the...
0
6106
agi2029
by: agi2029 | last post by:
Let's talk about the concept of autonomous AI software engineers and no-code agents. These AIs are designed to manage the entire lifecycle of a software development project—planning, coding, testing, and deployment—without human intervention. Imagine an AI that can take a project description, break it down, write the code, debug it, and then...
1
5406
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...
0
3534
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...
1
1981
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
0
804
bsmnconsultancy
by: bsmnconsultancy | last post by:
In today's digital era, a well-designed website is crucial for businesses looking to succeed. Whether you're a small business owner or a large corporation in Toronto, having a strong online presence can significantly impact your brand's success. BSMN Consultancy, a leader in Website Development in Toronto offers valuable insights into creating...

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.