iphone - problems with Apple BLTE-transfer sample app -

-

my installation of apple's btle-transfer app behaving flaky, on brand new ipads. have googled , not found solution.

i installed ios app apple btle-transfer v1.0 unmodified, using xcode 4.6.2, onto four, brand-new ipad mini's gen4 purchased apple store week ago, @ same time: 2 black colored ones ios v6.1.2 , 2 silver colored ones v6.1.3 2 v6.1.2 work best, flaky. 1 of v6.1.3 ones performs btle-transfer app transfers , then. , 2nd v6.1.3 never performs btle-transfer app transfers. no other bluetooth devices running.

but btle transfer fails. if 1 ipad peripheral , rest central, none or 1 or 2 others ever receive. ipad #4 never sends or receives.

ipad #2 peripheral talks #1 central, , #3 central, never #4 central ipad #1 peri talks #2, never #4, never #3.

the problem follows hardware, identical mini's therefore slight timing difference in hardware btle app fails adapt to.

i've tried cycling power on ipads , starting app in various sequences. no bluetooth devices nearby (within 30ft.).

the latest status: central reports rssi range of -59 -39 db both brand new ipad mini's side side. , why fail connect.

i investigate further, , report solution here...

the solution remove -35 db limit in apple's "btle central peripheral transfer" sample code app. search -35 , delete 'if' , 'return'.

once remove that, works dandy 30 frickin feet away. sweet!!

i tested 'fleet' of 4 ipad mini's , iphone 5.

but wait, there's more grief: after few minutes, app won't transfer anymore until close it, restart device, , re-run app. there comments within app implying less robust.


Comments

Post a Comment

Popular posts from this blog

java - Jmockit String final length method mocking Issue -

-
using jmockit 1.2 jar, trying mock string's length method getting unexpected invocation exception: failed: test java.lang.illegalstateexception: missing invocation mocked type @ point; please make sure such invocations appear after declaration of suitable mock field or parameter @ stringdemo.testa$1.<init>(testa.java:17) @ stringdemo.testa.test(testa.java:13) i using testng: @test public void test() throws exception { new expectations() { @mocked("length") string astring; { astring.length(); result = 2; } }; system.out.println(a.showa("test")); } } actual class a: public class { public static int showa(string str){ int a= str.length(); return a; } } this wrong way of recording expected results. shouldn't mock , record string's length() method, record showa() instead. here solution @suppresswarnings("unused...
Read more

What is the difference between data design and data model(ERD) -

-
i have google question , find answer in day. know, data design many many table have list column,and mark pk , fk. why er-diagram have find this? data design process of designing database. main output of data design detailed logical data model of database. some people data design includes of needed logical , physical design choices , physical storage parameters needed generate design in data definition language. technically, database analysis, database analysts (dbas) trained do. while person can both data design , database analysis, these 2 different tasks. data design models data. database analysis takes model , applies 1 or more database engines (relational, hierarchical, nosql). a logical data model 1 of main outputs of data design. data model represented entity relationship diagram, or er diagram.
Read more

ios - Can NSManagedObject conform to NSCoding -

-
i need transfer single object across device. right converting nsmanagedobject dictionary , archiving , sending nsdata. upon receiving unarchiving it. transfer nsmanagedobject archiving , unarchiving instead of creating intermediate data object. @interface test : nsmanagedobject<nscoding> @property (nonatomic, retain) nsstring * title; @end @implementation test @dynamic title; - (id)initwithcoder:(nscoder *)coder { self = [super init]; if (self) { self.title = [coder decodeobjectforkey:@"title"]; //<crash } return self; } - (void)encodewithcoder:(nscoder *)coder { [coder encodeobject:self.title forkey:@"title"]; } @end nsdata *archivedobjects = [nskeyedarchiver archiveddatawithrootobject:testobj]; nsdata *objectsdata = archivedobjects; if ([objectsdata length] > 0) { nsarray *objects = [nskeyedunarchiver unarchiveobjectwithdata:objectsdata]; } the problem above code is. crashes @ self.title in initwithcoder sa...
Read more