Search found 80 matches

by nurban
Fri Feb 13, 2015 1:37 pm
Forum: Edge Server Developers
Topic: Getting RSSI from RSSITagReadEvents
Replies: 20
Views: 14029

Re: Getting RSSI from RSSITagReadEvents

What are your thoughts on including this feature in a future release? Having a threshold seems quite useful thus far, and it's effectively disabled by setting the threshold value to zero. Has any consideration been given to this? I realize this is a larger change, but I'd hate to branch off from th...
by nurban
Mon Jan 26, 2015 1:06 pm
Forum: Edge Server Developers
Topic: Getting RSSI from RSSITagReadEvents
Replies: 20
Views: 14029

Re: Getting RSSI from RSSITagReadEvents

A new parameter, changeRSSIThreshold , has been added to configure the threshold value from the properties file. Changes were made to RSSIMonitorEsperFactory, RSSIMonitoringService, and RSSIMonitoringServiceImpl. Here are those three classes in their entirety as I am using them: RSSIMonitorEsperFact...
by nurban
Mon Jan 26, 2015 9:52 am
Forum: Edge Server Developers
Topic: Getting RSSI from RSSITagReadEvents
Replies: 20
Views: 14029

Re: Getting RSSI from RSSITagReadEvents

I'm glad to report this new filtering method is working great in testing. I'm still doing some tuning with the threshold, but I'm finding this implementation significantly reduces the occurrence of tags repeatedly moving back and forth between two or more readers. The RSSI Threshold is currently har...
by nurban
Fri Jan 23, 2015 3:27 pm
Forum: Edge Server Developers
Topic: Getting RSSI from RSSITagReadEvents
Replies: 20
Views: 14029

Re: Getting RSSI from RSSITagReadEvents

Took a different approach and used cascading windows to implement the RSSI threshold check. I only have my test EPL right now, but everything seems to be working as expected. Here's what the EPL looks like with a threshold of 2: create schema TagRead(tag string, rssi double, reader string); create w...
by nurban
Thu Jan 22, 2015 5:43 pm
Forum: Edge Server Developers
Topic: Getting RSSI from RSSITagReadEvents
Replies: 20
Views: 14029

Re: Getting RSSI from RSSITagReadEvents

I tested this quite a bit and did not run into any issues. Everything seems stable and all reads were reported as expected. However, I have run into some other problems when trying to go a step further with Esper modifications: When using RSSI filtering at my site, I have noticed a fair amount of "b...
by nurban
Fri Jan 16, 2015 6:30 pm
Forum: Edge Server Developers
Topic: Getting RSSI from RSSITagReadEvents
Replies: 20
Views: 14029

Getting RSSI from RSSITagReadEvents

I make use of the RSSIMonitoringService, and have been somewhat frustrated by the lack of functionality for the RSSITagReadEvent getter methods getAvgRSSI() and getTagCount(). For those who have not tested these, they will always return NULL when called. The issue is not a fault in these methods, bu...
by nurban
Thu Jan 08, 2015 10:12 am
Forum: General
Topic: ISO 18000-6c
Replies: 1
Views: 6822

Re: ISO 18000-6c

It's an international standard for how radio communication occurs between RFID devices. The benefit is compatibility with other ISO/IEC 18000 certified equipment.

ISO Standards
by nurban
Tue Jan 06, 2015 7:53 pm
Forum: Edge Server Developers
Topic: Tag stop reading
Replies: 2
Views: 2773

Re: Tag stop reading

If you move the tag to another readzone, does anything happen?
by nurban
Tue Dec 23, 2014 9:41 am
Forum: General
Topic: Alr9900 rfid reader
Replies: 1
Views: 6883

Re: Alr9900 rfid reader

Alien has several Java examples you can build on. If you purchased the developer's kit, everything you need should be on the CD that shipped with the reader. If not, you can download the SDK from the Alien FTP site.
by nurban
Wed Dec 17, 2014 10:32 am
Forum: General
Topic: Connecting to a reader
Replies: 2
Views: 7723

Re: Connecting to a reader

I'm not too familiar with the networking capabilities of the Raspberry Pi, but if it can be configured as a DHCP server, I don't see why this wouldn't work. You will probably want to assign a static IP to your reader from the Raspberry Pi. That said, is there a particular reason you can't use a swit...