Why is my iPad constantly sending/receiving (?) data via wifi?
I notice that even when I am not using my iPad that my modem is indicating that data is being transferred (no other devices connected) and when I turn off the wifi mode on the iPad the lights on the modem no longer flash. I have attempted to turn off anything that I think might be running in the background...???
Thank you, that seems to help some. I have turned off the main switch in "background app refresh" but I still see activity on my modem (?).
Similar Messages
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I need to find out how much wifi data my apps are using. I am on a very limited amount of WiFi data each month, which I am regularly exceeding. I have been told to work out which of my apps is using the data. Also, I think I have closed an app by double clicking the home button, then swiping the app up - is this the way to close it, or will it still be sending/receiving data?
Go into your Settings : General : and turn off background refresh for your apps. In Settings : Mail turn Fetch new data to OFF and Load Remote Images to OFF. This will mean that Mail will only check for messages when you actually use it, and all your advertising junk mail won't have all the images in it.
Turn off push notifications every chance you get.
Make sure you are actually quitting apps: to quit apps press the Home button twice and you should see a bunch of smaller screen images for every open app. To quit the app swipe from the screen image (not the icon) upward off the top of the iPad. You can swipe left and right to see more open apps, but there must be no left-right movement on the screen when you swipe upward to close the app.
Turn off your internet connection when you do not need it. The easiest way to do this is to swipe up from the bottom of you screen to get the control centre, and then touch the airplane to turn on airplane mode. You can repeat this sequence to turn it back on again when you need it. Most especially turn airplane mode on whenever you are sleeping your iPad for long periods. This will save battery life too. OR actually turn your iPad off - which means holding the power key down for several seconds until the red swipe bar appears, and then swipe to turn it off. If you go this route, note that it will take longer to turn on then it takes to wake from sleep. -
Why Does the iPhone not send/receive MMS?
Why Does the iPhone not send/receive MMS? this in the works?
"Why Does the iPhone not send/receive MMS?"
Apple chose not to offer this as a feature of iphone. E-mail can accomplish the same thing.
"is in the works?"
This has been asked and answered countless times. The forum search bar is on the right side of this page.
Apple has announced that MMS will be included in the 3.0 software due out this summer. Before you ask, all that has been announced is in this link:
http://www.apple.com/iphone/preview-iphone-os/
Apples developer conference begins tomorrow. -
Send/receive data without a terminating character
I am trying to use the visa driver to send hex data over a serial port. I have tried to disable terminating characters but when I read from the port the trasnmission still terminates with a 0x0A character. How can I send/receive data without a terminating character???
You need to call viSetAttribute with VI_ATTR_ASRL_END_IN set to VI_ASRL_END_NONE. In LabVIEW, use a write property node with the Serial End In mode set to None (0).
Dan Mondrik
Senior Software Engineer, NI-VISA
National Instruments -
SCOM SQL Query to find Mail Latency (Send/ Receive) Data.
Hi,
I unable to find Mail Latency (Send/ Receive) Data in SCOM 2012 SQL Query.
need your help to find SQL query that fetches below details
1. Average Time for Accessing Mailbox.
2. Average Time to Send and Receive Mail.
Regards,
Vinoth Kumar.Hi Vinoth
There are no specific tables storing the mailbox related data.
To find information about Exchange in SCOM you need the Exchange management pack for the version of Exchange you are running, as well as monitoring the Exchange servers.
When that has been done you can find reports and performance views for Exchange.
I am unsure if you can find this specific information for Exchange in SCOM, i would look into the management pack. If you cannot find the information, i suggest you consult your Exchange administrator to get this information.
www.coretech.dk - blog.coretech.dk -
Why can't iPad mini send text to non apple users????? I wish I knew this before purchase
Why can't iPad mini send text to non apple users????? I wish I knew this before purchase
iMessage is from Apple to communicate with other Apple devices.
iPad is not a phone and does not have SMS/MMS services from a carrier. There are apps that can do this, search the App Store. -
Why does my IPad say "sending the message content to the server failed
Why does my IPad say "sending the message content to the server failed" I have checked the wi-fi connection and everything is fine and the email addresses are correct so what's wrong
Is it an ordinary mail without attachments and links in the body of the email? If so, try deleting the email accountb and setting it up again.
-
Why does my iPad constantly ask for a keychain security access code?
Why does my iPad constantly ask for a keychain security access code?
You might have some app updates or other itmes that are trying to download.
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Receiving data via 802.15.4 radio
Hi,
I am familiar with using a bluetooth radio to receive data wirelessly through the serial port using VISA in LabVIEW. However due to the range limitations of my bluetooth radio, I'd like to have a go at receiving date via from an 802.15.4 radio. Has anyone any experience doing something like this and is it possible using VISA and a serial port? Presuming I know the data packet format, it should be ok right..?
StrokesLewis G wrote:
Hi Strokes,
Do you plan on buying a third party 802.15.4 wireless device that connects to your computer through the serial port? What hardware do you intend to use?
I assume you wish to use your existing code that was designed for the Bluetooth dongle. Are you communicating using a serial protocol or Bluetooth protocol (Bluetooth or Serial VIs)?
What is your current setup? Do you have a Bluetooth device that connects to your PC via serial? What hardware do you have sending and receiving the data?
Have you seen the NI Wireless Sensor Networks and have you thought about Using LabVIEW with TCP/IP and UDP?
Kind Regards
No I plan on using a Shimmer device (see here) which as a 802.15.4 radio on it's circuit board to communicate to a laptop via serial port.
I'm not set on using the existing code as used with the bluetooth radio on the Shimmer, but if it will reduce the workload then yes of course I will. The existing code currently uses serial protocol so I guess I could modify the existing code?
My current setup is: I have a Shimmer (wireless sensor, accelerometer in this case) that has both a bluetooth radio and 802.15.4 radio. Due to my application needs, I would like to transmit data to the serial port via the 802.15.4. There is existing code which allows the Shimmer to communicate with the serial port using Bluetooth radio.
I'm not looking for code or anything, just wanted to know how to go about it and if I could use VISA which I'm fairly familiar with.
Thanks,
Strokes -
Why wont my iPad connect to the closest/strongest wifi?
Why wont my iPad connect to the closest/strongest wifi at home? It alway defaults to the one upstairs even when I am right next to our extender in the kitchen?
Try #5.
Some things to try first:
1. Turn Off your iPad. Then turn Off (disconnect power cord for 30 seconds or longer) the wireless router & then back On. Now boot your iPad. Hopefully it will see the WiFi.
2. Go to Settings>Wi-Fi and turn Off. Then while at Settings>Wi-Fi, turn back On and chose a Network.
3. Change the channel on your wireless router (Auto or Channel 6 is best). Instructions at http://macintoshhowto.com/advanced/how-to-get-a-good-range-on-your-wireless-netw ork.html
4. Go into your router security settings and change from WEP to WPA with AES.
5. Renew IP Address: (especially if you are droping internet connection)
• Launch Settings app
• Tap on Wi-Fi
• Tap on the blue arrow of the Wi-Fi network that you connect to from the list
• In the window that opens, tap on the Renew Lease button
6. Potential Quick Fixes When Your iPad Won’t Connect to Your Wifi Network
http://ipadinsight.com/ipad-tips-tricks/potential-quick-fixes-when-your-ipad-won t-connect-to-your-wifi-network/
~~~~~~~~~~~~~~~~~~~~~~~~~
Wi-Fi Fix for iOS 6
https://discussions.apple.com/thread/4823738?tstart=240
iOS 6 Wifi Problems/Fixes
How To: Workaround iPad Wi-Fi Issues
http://www.theipadfan.com/workaround-ipad-wifi-issues/
Another Fix For iOS 6 WiFi Problems
http://tabletcrunch.com/2012/10/27/fix-ios-6-wifi-problems-ssid/
Wifi Doesn't Connect After Waking From Sleep - Sometimes increasing screen brightness prevents the failure to reconnect after waking from sleep. According to Apple, “If brightness is at lowest level, increase it by moving the slider to the right and set auto brightness to off.”
Fix For iOS 6 WiFi Problems?
http://tabletcrunch.com/2012/09/27/fix-ios-6-wifi-problems/
Did iOS 6 Screw Your Wi-Fi? Here’s How to Fix It
http://gizmodo.com/5944761/does-ios-6-have-a-wi+fi-bug
How To Fix Wi-Fi Connectivity Issue After Upgrading To iOS 6
http://www.iphonehacks.com/2012/09/fix-wi-fi-connectivity-issue-after-upgrading- to-ios-6.html
iOS 6 iPad 3 wi-fi "connection fix" for netgear router
http://www.youtube.com/watch?v=XsWS4ha-dn0
Apple's iOS 6 Wi-Fi problems
http://www.zdnet.com/apples-ios-6-wi-fi-problems-linger-on-7000004799/
~~~~~~~~~~~~~~~~~~~~~~~
How to Boost Your Wi-Fi Signal
http://ipad.about.com/od/iPad_Troubleshooting/a/How-To-Boost-Your-Wi-Fi-Signal.h tm
Troubleshooting a Weak Wi-Fi Signal
http://ipad.about.com/od/iPad_Troubleshooting/a/Troubleshooting-A-Weak-Wi-Fi-Sig nal.htm
How to Fix a Poor Wi-Fi Signal on Your iPad
http://ipad.about.com/od/iPad_Troubleshooting/a/How-To-Fix-A-Poor-Wi-Fi-Signal-O n-Your-iPad.htm
iOS Troubleshooting Wi-Fi networks and connections http://support.apple.com/kb/TS1398
iPad: Issues connecting to Wi-Fi networks http://support.apple.com/kb/ts3304
WiFi Connecting/Troubleshooting http://www.apple.com/support/ipad/wifi/
How to Fix: My iPad Won't Connect to WiFi
http://ipad.about.com/od/iPad_Troubleshooting/ss/How-To-Fix-My-Ipad-Wont-Connect -To-Wi-Fi.htm
iOS: Connecting to the Internet http://support.apple.com/kb/HT1695
iOS: Recommended settings for Wi-Fi routers and access points http://support.apple.com/kb/HT4199
How to Quickly Fix iPad 3 Wi-Fi Reception Problems
http://osxdaily.com/2012/03/21/fix-new-ipad-3-wi-fi-reception-problems/
iPad Wi-Fi Problems: Comprehensive List of Fixes
http://appletoolbox.com/2010/04/ipad-wi-fi-problems-comprehensive-list-of-fixes/
Connect iPad to Wi-Fi (with troubleshooting info)
http://thehowto.wikidot.com/wifi-connect-ipad
Fix iPad Wifi Connection and Signal Issues http://www.youtube.com/watch?v=uwWtIG5jUxE
Fix Slow WiFi Issue https://discussions.apple.com/thread/2398063?start=60&tstart=0
How To Fix iPhone, iPad, iPod Touch Wi-Fi Connectivity Issue http://tinyurl.com/7nvxbmz
Unable to Connect After iOS Update - saw this solution on another post.
https://discussions.apple.com/thread/4010130
Note - When troubleshooting wifi connection problems, don't hold your iPad by hand. There have been a few reports that holding the iPad by hand, seems to attenuate the wifi signal.
~~~~~~~~~~~~~~~
If any of the above solutions work, please post back what solved your problem. It will help others with the same problem.
Cheers, Tom -
RS-485: PC can send/receive data from PCI card, but LabVIEW can only send to card.
I have a master/slave setup with a 2-wire RS-485 connection via a StarTech PCI2S485 card http://www.startech.com/product/PCI2S485-2-Port-PCI-RS-422-485-Card-with-DB9. A Vista PC running LabVIEW 2010 is acting as the master to 6 slave devices. I am running a driver VI supplied by the company that made the slaves.
I've used a terminal program called Termite to monitor the ports during operation and have concluded that both the PC and the slaves are sending correct data packets (i.e. correct protocol and reasonable data). Termite indicates that the slave's response is being received by the PCI card, but the problem is that LabVIEW simply isn't reading the response from the card. Each time the driver VI is run it returns a "timeout waiting for slave to respond" error.
The VI and slaves I am using are designed for both RS-232 and 485 communication. I've verified the VI to run in 232 mode on a different COM port. I also wrote a simple VI using the VISA functions to test the ports on the PCI card, but I've had the same results. Hardware connections have been looked over carefully, but the fact that the card actually sends a correct message and receives a correct message indicates a different problem.
Any idea why LabVIEW can talk to the PCI card but can't hear it? Is there anything I can do about this, or does LabVIEW generally not like StarTech's PCI2S485 cards?
Thanks,
TimTim359 ha scritto:
I have a master/slave setup with a 2-wire RS-485 connection via a StarTech PCI2S485 card http://www.startech.com/product/PCI2S485-2-Port-PCI-RS-422-485-Card-with-DB9. A Vista PC running LabVIEW 2010 is acting as the master to 6 slave devices. I am running a driver VI supplied by the company that made the slaves.
I've used a terminal program called Termite to monitor the ports during operation and have concluded that both the PC and the slaves are sending correct data packets (i.e. correct protocol and reasonable data). Termite indicates that the slave's response is being received by the PCI card, but the problem is that LabVIEW simply isn't reading the response from the card. Each time the driver VI is run it returns a "timeout waiting for slave to respond" error.
The VI and slaves I am using are designed for both RS-232 and 485 communication. I've verified the VI to run in 232 mode on a different COM port. I also wrote a simple VI using the VISA functions to test the ports on the PCI card, but I've had the same results. Hardware connections have been looked over carefully, but the fact that the card actually sends a correct message and receives a correct message indicates a different problem.
Any idea why LabVIEW can talk to the PCI card but can't hear it? Is there anything I can do about this, or does LabVIEW generally not like StarTech's PCI2S485 cards?
Thanks,
Tim
RS232 interface consist of 2 indipendent communication crossed lines between 2 devices (9DSub connector: Pin 2-RX Pin 3-TX pin 5-Gnd)
RS485 interfaceis a bus, shared between 2 or more devices. (like ethernet or CAN Bus)
This means that an incorrect use of the bus can lead to a "packet collision" if 2 or more devices try to send a message on the bus at the same time or at least their messages, partially "overlap"
About 10 years ago I have used a PCI 2 RS485 port: I remember that I have to change the status of RTS serial control line to switch between transmit and receive mode.
This can be done using the serial VISA property:
Serial Settings --> Modem Line Settings --> DTR State
or using the VI
<LabVIEW dir>\vi.lib\Instr\_sersup.llb\serial line ctrl.vi (LV 8.6.1)
The result was that the slave device connected, send me the response after few nanosec. causing the lost of the answer.
because LabVIEW use more than some nanosec. to change RTS property after sending message on the 485 bus calling a VISA Write.
So for me there was 2 possibilities:
- use 2 RS485 port (1 for transmit 1 for receive echo transmit included)
- use this converter
http://www.advantech.com/products/ADAM-4521/mod_2E78D425-8B08-43F6-81B0-1B924E53E075.aspx
this converter, after sending a message on the bus, electronically switchs back to receive mode without losing a byte.
But the question is :
what does it means
"RS-485 mode supports Auto Transceiver turn around (ATTA)"
of your card?
bye -
Question about send/receive data in as3
hello
i want to ask : how can i send data from flash to php using as3 and receive data from php using flash .
and another question : how can i upload files using as3 .
thank you .Look into URLLoader documentation for sending/receiving and FileReference for uploading:
http://www.adobe.com/livedocs/flash/9.0/ActionScriptLangRefV3/flash/net/URLLoader.html
http://www.adobe.com/livedocs/flash/9.0/ActionScriptLangRefV3/flash/net/FileReference.html -
Hi All !!!
I am developing a program to receive and send data over GPRS. A remote device is sending data at a particular port (6600) of my server. I am able to read that through ServerSocket. However I am not being able to send any data to that device.
Any help?I am using the code:
// Constructor
public ServerSocketReader(Socket socket) {
super("MultiSocketThread");
this.clientSocket = socket;
this.setDaemon(true);
public void run() {
try {
OutputStream out = clientSocket.getOutputStream();
InputStreamReader in = new InputStreamReader(clientSocket.getInputStream ());
//BufferedWriter bw = new BufferedWriter(new FileWriter(_filepath, true));
java.util.Date date = new java.util.Date();
SimpleDateFormat sdf = new SimpleDateFormat("EEE, dd-MMM-yy HH:mm:ss");
GprsProtocol protocol = new GprsProtocol();
int charCount = 0;
char[] cBuffer = new char[1000];
byte[] bBuffer;
String fromClient = "", toClient = "START";
int ii = 0;
while ((ii = in.read()) != -1) {
fromClient = fromClient + (char)ii;
if (fromClient.endsWith("2Y")) { //according to protocol
toClient = protocol.processInput(fromClient); //Protocol
bBuffer = toClient.getBytes();
for (int k=0; k<bBuffer.length; k++) {
out.write ((char)bBuffer[k]);
out.flush();
fromClient = "";
out.close ();
in.close ();
clientSocket.close ();
//bw.close();
} catch (IOException ioe) {
//out.println("Error::" + e);
System.out.println("Error in writing file : ");
ioe.printStackTrace();
} catch (Exception e) {
System.out.println("Error in ServerSocketReader : ");
e.printStackTrace();
finally {
//this.destroy();
I am geeting the error at line :-
while ((ii = in.read()) != -1) {
the error is :-
java.net.SocketException: A connection with a remote socket was reset by that socket.: A connection with a remote socket was rese
by that socket.
at java.net.SocketInputStream.socketRead(Native Method)
at java.net.SocketInputStream.read(SocketInputStream.java:104)
at java.net.SocketInputStream.read(SocketInputStream.java:82)
at java.io.InputStreamReader.fill(InputStreamReader.java(Compiled Code))
at java.io.InputStreamReader.read(InputStreamReader.java:256)
at java.io.InputStreamReader.read(InputStreamReader.java:229)
at ServerSocketReader.run(ServerSocketReader.java(Compiled Code)) -
My motor receives data via a serial connection, but it won't move. What am I doing wrong?
Hello everyone,
as the title says, I am trying to use a motor called "MP285" by Sutter Instruments via LabView. The control unit of this motor only has a RS232-output, but I use a Serial-to-Usb-Adapter to connect the device to the PC.
My problem is the following:
I tried to perform a basic Input/Output test by using the Ni MAX an sending ASCII strings to the control unit (after configuring it according to the reference manual), which worked fine. I also used the "jabber"-function of the control unit to send an output string to the PC and was also able to read that string from the buffer. Besides, when I used a LabView-VI to send a command via VISA Write, it also appears on the display of the control (at least the ASCII letters).
Accordingly, I assume that the Serial-to-USB-adapter does work. Is that for sure, or can the adapter evoke any other problems?
However, when I try to use the shipped controlling software, the motor won't work. Furthermore, I contacted the customer support and they sent me some VIs and a LabView-Project, which was tested by the company. Unfortunately, it did not work for me. The motor wouldn't move, when I sent the command, although the LabView-interface indicates that there the connection between PC and controller has been established. As the program has many features and I only need a command to move the motor, read the position and set the origin, I tried to build my own VI. I had a look at some basic VIs for motor control and referred to the manual.
As it seems, the controller uses data streams of full bytes (8 bits, not ASCII) in Big Endian for its strings (I copied the information at the bottom of this text). Thus, I tried to concatenate particular strings to send it via VISA in the correct form (see attached). Do I have to convert the "m" into hexadecimal explcitly? I looked up "Convert ASCII to Hexadecimal", but when I try this, the output string does not change.
However, when I send this string to the controller in normal mode, nothing happens . When I activate the Input/Ouput test (see above), there is a m displayed on the controller unit. So I guess, I am messing up the command structure. Can anybody help me please?
Kind regards
PS: Sorry for cleaning up the diagramm..
PPS: For some reason, I could not attach the VI because " The contents of the attachment doesn't match its file type". So, I changed the name in "-vi" instead of ".vi" as suggested by a forum user. Hope this works for you!
Excerpt form the reference manual:
General Information:
"Command requests are single bytes followed by optional parameters and terminated by a
carriage return (CR, 0Dh). The data stream consists of full bytes (all 8 bits — not ASCII.
The lowest order byte (for example, of the four bytes encoding the X coordinate) is the first
into the controller and is the first out. The default Baud rate is 9600. Commands are
processed bytewise by interrupt and executed only after the terminating CR is received.
There are no delimiters within command strings. The controller will reply with carriage
return (CR, 0Dh) at the completion of normal command processing."
Command structure:
Get Current Position command ‘c’CR 063h + 0Dh
returns xxxxyyyyzzzzCR three signed long (32-bit) integers + 0Dh
Go To Position command ‘m’xxxxyyyyzzzzCR 06Dh + three signed long (32-bit) integers + 0Dh
returns CR 0Dh
Setting up for Serial Communication:
First, use the 9-pin serial port cable provided with the MP-285 to connect the “serial port” of
your computer to that of the MP-285 controller. Next configure your terminal emulator (e.g.,
HyperTerminal in Microsoft Windows (9X and above) to the following settings (or their
equivalent):
• TTY mode
• Echo typed characters locally only (do not echo input to the computer serial port back to
the controller)
• Baud rate to 9600
• 8 data bits, no parity, 1 stop bit
• COM port - set to the port to which you have connected the MP-285 controller
Solved!
Go to Solution.
Attachments:
MotorTestVI-vi 17 KBThank you for your feedback!
To make this clear: I dont know if the motor MOVES when sending the appropriate command via MAX. That is because I dont know how to enter the binary? command. I only tried to send some string like "dear moto please move" to see if this ASCII string can be displayed on the control unit while running the input-mode (which I described above).
This works for both, MAX and my Labview-Vi.
However, these are the I/O traces:
1. MAX: I sent the string: "Test"
NI I/O trace:
viWrite (ASRL25::INSTR (0x026B41E8), "Test", 4, 4) Process ID: 0x0000123C Thread ID: 0x00001434 Start Time: 16:18:31.599 Call Duration 00:00:00.000 Status: 0 (VI_SUCCESS)
2. LabView-Vi (I removed everything that followed the first "Visa Write" and added the recommended property node to check if my termination char is correct). I sent string "TEST".
14. viOpenDefaultRM (0x065171F0) Process ID: 0x0000154C Thread ID: 0x00000678 Start Time: 16:24:34.918 Call Duration 00:00:00.000 Status: 0 (VI_SUCCESS)
15. viParseRsrc (0x065171F0, "COM25", 4, 25) Process ID: 0x0000154C Thread ID: 0x00000678 Start Time: 16:24:34.918 Call Duration 00:00:00.002 Status: 0 (VI_SUCCESS)
16. VISA Set Attribute ("COM25", 0x3FFF001A, 3000) Process ID: 0x0000154C Thread ID: 0x00000678 Start Time: 16:24:34.920 Call Duration 00:00:00.020 Status: 0 (VI_SUCCESS)
17. VISA Set Attribute ("COM25", 0x3FFF0021, 1200) Process ID: 0x0000154C Thread ID: 0x00000678 Start Time: 16:24:34.940 Call Duration 00:00:00.000 Status: 0 (VI_SUCCESS)
18. VISA Set Attribute ("COM25", 0x3FFF0022, 8) Process ID: 0x0000154C Thread ID: 0x00000678 Start Time: 16:24:34.940 Call Duration 00:00:00.001 Status: 0 (VI_SUCCESS)
19. VISA Set Attribute ("COM25", 0x3FFF0024, 10) Process ID: 0x0000154C Thread ID: 0x00000678 Start Time: 16:24:34.941 Call Duration 00:00:00.000 Status: 0 (VI_SUCCESS)
20. VISA Set Attribute ("COM25", 0x3FFF0023, 0) Process ID: 0x0000154C Thread ID: 0x00000678 Start Time: 16:24:34.941 Call Duration 00:00:00.000 Status: 0 (VI_SUCCESS)
21. VISA Set Attribute ("COM25", 0x3FFF0038, 1) Process ID: 0x0000154C Thread ID: 0x00000678 Start Time: 16:24:34.941 Call Duration 00:00:00.000 Status: 0 (VI_SUCCESS)
22. VISA Set Attribute ("COM25", 0x3FFF0018, 13) Process ID: 0x0000154C Thread ID: 0x00000678 Start Time: 16:24:34.941 Call Duration 00:00:00.000 Status: 0 (VI_SUCCESS)
23. VISA Set Attribute ("COM25", 0x3FFF0025, 0) Process ID: 0x0000154C Thread ID: 0x00000678 Start Time: 16:24:34.941 Call Duration 00:00:00.000 Status: 0 (VI_SUCCESS)
24. VISA Set Attribute ("COM25", 0x3FFF00B3, 2) Process ID: 0x0000154C Thread ID: 0x00000678 Start Time: 16:24:34.941 Call Duration 00:00:00.000 Status: 0 (VI_SUCCESS)
25. VISA Get Attribute ("COM25", 0x3FFF0018, 13) Process ID: 0x0000154C Thread ID: 0x00000678 Start Time: 16:24:34.941 Call Duration 00:00:00.000 Status: 0 (VI_SUCCESS)
26. VISA Get Attribute ("COM25", 0x3FFF0038, True) Process ID: 0x0000154C Thread ID: 0x00000678 Start Time: 16:24:34.941 Call Duration 00:00:00.000 Status: 0 (VI_SUCCESS)
27. VISA Write ("COM25", "TEST", 4) Process ID: 0x0000154C Thread ID: 0x00000678 Start Time: 16:24:34.941 Call Duration 00:00:00.001 Status: 0 (VI_SUCCESS)
28. VISA Close ("COM25") Process ID: 0x0000154C Thread ID: 0x00000678 Start Time: 16:24:34.942 Call Duration 00:00:00.110 Status: 0 (VI_SUCCESS)
Both strings are correctly displayed. -
CANT receive data via a network, help me please
Hi, I am not as newbie as I look like to.
I am trying to receive data through a network. The problem is that I dont know the file size, so I kept reading until reaching the end of file and the save it to a file. The problema is that I am never geting the -1 result from the read method.
Now, I noticed that the -1 is returned when I close the DataOutputStream. So thats okay. The problem is that the sender is not make in java, but on pocketBuilder. And I cant ask for the client to close an outputStream. So Is there any way to just read the data without knowing the number of the bytes to receive and doesnt waiting for the end of the stream.When the number of bytes read is less than the array
lengthThat doesn't necessarily mean you're at the end of the data.
Any other wahy, maybe a timer (if is not receiving
any byte for 20 seconds then cut the conexion?)Again that doesn't necessarily mean you're at the end of the data.
There is no way to know you're at the end of the data without either an application protocol containing the length, or a socket close at the sender.
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