Hi,

I am building my first demo applications for our bug device, i built a simple application which show a screen with the gps coordinates. It runs well on the simulator but when i send it to the physical bug it doesn’t show the screen it should, instead it remains in the main bug screen.

In the bug, if I long click in myapp icon and it shows the option: “stop” as if it were running. do you know why i can not see my screen in the bug’s LCD? 

tks

Hi,

 

I am building my first demo applications for our bug device, i built a simple application which show a screen with the gps coordinates. It runs well on the simulator but when i send it to the physical bug it doesn’t show the screen it should, instead it remains in the main bug screen.

Hi Jhernandez, sorry about the response delay.  Can you give me some information about your configuration?  For example, in your ServiceTracker you’re likely binding to some services, for example, BUGCamera_HelloWorld’s Activator:

private static final String [] services = { ICamera2Device.class.getName(), IModuleDisplay.class.getName(), ICameraModuleControl.class.getName(), IButtonEventProvider.class.getName(), }

That determines when your application’s code will run.  It may be that on the BUG Simulator, the services you require are available, but on the Physical BUG they are not.

In the bug, if I long click in myapp icon and it shows the option: “stop” as if it were running. do you know why i can not see my screen in the bug’s LCD? 

This helps manage the runtime of the bundle, but not your application.  Your bundle has started, but your app’s run method (or other method, depending on how you wrote your app) has not been called.

Thanks, these are the services i am tracking:

private static final String [] services={
        ILCDModuleControl.class.getName(),
        IML8953Accelerometer.class.getName(),
        IModuleDisplay.class.getName(),
        IButtonEventProvider.class.getName(),
        IPositionProvider.class.getName()
    };

in the Bug I have attached the GPS and the LCD modules.

Ok great, and to determine if those services are available, with the modules attached, if you have shell access via ssh or serial, you can do:

telnet localhost 8090

you should see:

Trying 127.0.0.1... Connected to localhost. Escape character is '^]'. (:

type:

services

And you’ll see a list similar to:

1 org.osgi.service.startlevel.StartLevel 2 org.osgi.service.packageadmin.PackageAdmin 3 org.osgi.service.log.LogService .... 26 org.apache.felix.cm.PersistenceManager service.description = Platform Filesystem Persistence Manager, service.pid = org.apache.felix.cm.file.FilePersistenceManager, service.ranking = service.vendor = Apache Software Foundation 27 org.osgi.service.cm.ConfigurationAdmin service.description = Configuration Admin Service Specification 1.2 Implementation, service.pid = org.apache.felix.cm.ConfigurationAdminservic e.vendor = Apache Software Foundation 29 org.osgi.service.log.LogService 30 org.osgi.service.log.LogReaderService (:

ok, i am able to type services in telnet but before, I had to remove the gps module, otherwise i get a cascade of GPS messages which do not allow me to enter the word “services”. is there a chance to avoid seeing those gps messages?

jhernandez:

These messages are printed when the GPS module cannot get coordinates. It should handle this situation in a less verbose way, but it doesn’t. You should stop seeing these messages if you attatch the GPS antenna and place it somewhere where the device can get a better signal (for example, near a window if you can find one).

I’m trying to find a better solution, but that’s the best I can give you for right now.

I got the following from the telnet, i checked and it seems that all the services i am tracking are in the list (I highlighted those services). please let me know if you see something out of order:

p { margin-bottom: 0.21cm; }

1
org.osgi.service.startlevel.StartLevel

2
org.osgi.service.packageadmin.PackageAdmin

3 org.osgi.service.log.LogService Buffer Size = 32, Error Stream =
java.io.PrintStream, Implementation =
com.buglabs.osgi.log.LogServiceImpl, Log Level = 3, Output Stream =
java.io.PrintStream, Quiet = false, service.ranking =

4
org.osgi.service.log.LogReaderService Buffer Size =
32, Error Stream = java.io.PrintStream, Implementation =
com.buglabs.osgi.log.LogServiceImpl, Log Level = 3, Output Stream =
java.io.PrintStream, Quiet = false, service.ranking =

5
com.buglabs.bug.base.pub.ITimeProvidiml8953er

6 com.buglabs.device.IButtonEventProvider Button =
User, Provider = com.buglabs.bug.base.Activat

7
com.buglabs.bug.base.pub.IBUG20BaseControl
bug.base.version = 2.0

8
com.buglabs.bug.base.pub.IShellService

10
com.buglabs.module.IModuleControl
gps.antenna.external = false, ModuleRevision = 0, ModuleVendorID = 0,
Power State = Active, Provider =
com.buglabs.bug.module.gps.GPSModlet, Slot = 0

11
com.buglabs.module.IModuleLEDController
gps.antenna.external = false, ModuleRevision = 0, ModuleVendorID = 0,
Provider = com.buglabs.bug.module.gps.GPSModlet, Slot = 0

12
com.buglabs.bug.module.gps.pub.IGPSModuleControl
gps.antenna.external = false, ModuleRevision = 0, ModuleVendorID = 0,
Provider = com.buglabs.bug.module.gps.GPSModlet, Slot = 0

13
com.buglabs.bug.module.gps.pub.INMEARawFeed
gps.antenna.external = false, ModuleRevision = 0, ModuleVendorID = 0,
Provider = com.buglabs.bug.module.gps.GPSModlet, Slot = 0

14
com.buglabs.bug.module.gps.pub.INMEASentenceProvider
gps.antenna.external = false, ModuleRevision = 0, ModuleVendorID = 0,
Provider = com.buglabs.bug.module.gps.GPSModlet, Slot = 0

15
com.buglabs.services.ws.PublicWSProvider

16 com.buglabs.bug.module.gps.pub.IPositionProvider
service.remote.registration = true

18
com.buglabs.module.IModuleControl ModuleRevision
= 0, ModuleVendorID = 0, Power State = Active, Provider =
com.buglabs.bug.module.lcd.pub.LCDModlet, Slot = 1

19
com.buglabs.module.IModuleLEDController
service.remote.registration = trueSlot = 1

20 com.buglabs.bug.module.lcd.pub.IML8953Accelerometer
ModuleRevision = 0, ModuleVendorID = 0, Provider =
com.buglabs.bug.module.lcd.pub.LCDModlet, Slot = 1

21
com.buglabs.services.ws.PublicWSProvider

22 com.buglabs.bug.module.lcd.pub.ILCDModuleControl
service.remote.registration = trueSlot = 1

23 com.buglabs.bug.module.lcd.pub.IModuleDisplay height = ,
service.remote.registration = true, Slot = 1width =

24
com.buglabs.bug.module.pub.IModletFactory

9
com.buglabs.bug.module.pub.IModletFactory Bug-Module-Id =
0001, Source = com.buglabs.bug.module.gps.Activator

17
com.buglabs.bug.module.pub.IModletFactory

25
com.buglabs.bug.module.pub.IModletFactory

26
com.buglabs.bug.module.pub.IModletFactory

27
com.buglabs.bug.module.pub.IModletFactory Bug-Module-Id =
0007, Source = com.buglabs.bug.module.vonhippel.Activator

28
com.buglabs.bug.networking.pub.INetworking

35
com.buglabs.bug.program.pub.IUserAppManager

29
com.buglabs.services.ws.PublicWSAdmin

30
org.osgi.service.http.HttpService openPort = ,
port =

31
com.buglabs.osgi.sewing.pub.ISewingService

32
com.buglabs.osgi.shell.IShellCommandProvider

41
com.buglabs.osgi.shell.IShellCommandProvider

42
com.buglabs.osgi.shell.IShellCommandProvider

43
com.buglabs.osgi.shell.pub.IShellCommandExecutor

44
com.buglabs.osgi.shell.IShellCommandProvider

33
org.apache.felix.cm.PersistenceManager
service.description = Platform Filesystem Persistence Manager,
service.pid = org.apache.felix.cm.file.FilePersistenceManager,
service.ranking = service.vendor = Apache Software Foundation

34
org.osgi.service.cm.ConfigurationAdmin
service.description = Configuration Admin Service Specification 1.2
Implementation, service.pid =
org.apache.felix.cm.ConfigurationAdminservice.vendor = Apache
Software Foundation

36 webadmin.IBatteryInfoProvider

37
com.buglabs.application.IDesktopApp

38
com.buglabs.bug.networking.pub.IStateListener

39
com.buglabs.bug.networking.pub.ISettingsListener

40
com.buglabs.application.IDesktopApp

jhernadez,

Can you post your code to Bug Net (http://www.buglabs.net/applications) and make me a collaborator so I can see if I can spot any issues? My username on Bug Net is Andrew Turley.

andy

jhernandez,

Thank you for sharing your code. I think the problem is that you do not have IML8953Accelerometer.class.getName() in the services list in Activator.java. As a consequence, accelerometer is null, which cause an NPE in the GUI code, and the UI is never drawn.

I am at home without a working GPS module, so I am not able to verify this on actually hardware, but please try adding the IML8953Accelerometer to the list of services and see if that helps.

andy

Thanks for your comments, actually I had IML8953Accelerometer in the list of services before but I decided to remove it in order to see if it was causing the issue. I put it back and the problem is still there. let me know if you find something else. 

jhernandez,

I was able to find a working GPS unit. It looks like IPositionProvider.getLatitudeLongitude() returns null if it can’t get a GPS position. Using the null LatLon object later in the code results in an NPE, and since that code is in a GUI call it prevents the GUI from being drawn.

Here’s a forum post that talks about looking at the raw position feed and parsing the data yourself. In the meantime, you should at least check to make sure that the LatLon object is not null before using it.

andy

I added a validation to see if LatLon is null, it fixed the problem. Thank you.

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