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Questions tagged [llrp]

Low Level Reader Protocol

14 questions
3
votes
2 answers

Sending messages via LLRP

Does anyone have experience with LLRP? I found two modules on npm (and modified one to get more data out of it), but I have no idea how to actually send messages to my Impinj reader. I understand this may be a niche issue but hey, you never know who…
NetOperator Wibby
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1 answer

How can I read user data (memory) from EPC RFID tag through LLRP?

I encode two EPC tags through "NiceLabel Pro" with data: First tag: EPC: 555555555, UserData: 9876543210123456789 Second tag: EPC: 444444444, UserData: 123456789123456789 Now I'm trying to get that data through LLRP (in my Java application): My…
MatthewP
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1 answer

How to use .NET LLRP Library : Org.LLRP.LTK.LLRPV1.LLRPXmlParser.ParseXMLToLLRPMessage

I am developing an application using LLRP library. After gateway(computer) receive my message from reader(simulated reader using localhost) I would like to convert it to LLRPMessage using …
newbuntu
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1 answer

LLRP Motorola 9500 Not sending read tag event

We are trying to connect FX9500 using LLRP tool kit code. We would like to receive read tag as soon as they come into range. From messages it looks like all add/set config are done properly, but can't receive events. Attached are code and XML…
navaltiger
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FX7400: LLRP error: "Report Buffer Overflow Error Event (251)"

I have few Motorola FX7400 readers that read RFID tags on production line + app based on EMDK(EMDK for .NET v2.8) to fetch inventory data. Randomly(?) some of readers stop to deliver correct tag inventory report and continously return "Report…
st4hoo
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Looping Impinj R420 RFID measurements using sllurp library

I'm using an Impinj Speedway reader R420 that is connected to a S8656PL antenna and to my computer via a switch. I'm trying to make a pyhton program that allows communication with my reader and display tags. To do that, I'm using the following llrp…
Magzouu_
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1 answer

LLRP for Zebra FX7500 with llrpjs doesn't read tags

Using the llrpjs library for Node.js, we are attempting to read tags from the Zebra FX7500 (Motorola?). This discussion points to the RFID Reader Software Interface Control Guide pages 142-144, but does not indicate potential values to set up the…
Steven King
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1 answer

Read the Tag Inventory of a Motorola/Zebra FX9500 RFID Reader using Python sllurp library

I am trying to write an application for reading an inventory of tags using Zebra FX9500 RFID reader. I tried to install the SDK from the manufacturers website, but couldn't understand how to use it and I'm also not familiar with C,C# or Java so…
Bogdan Prădatu
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1 answer

LLRP integration with QT giving error "Skipping incompatible /path/libltkcpp.a when searching for -lltkcpp"

I am writing an application on QT Creator with C++ to read RFID tags via LLRP protocol. I am using the example.cpp as provided in the llrp.org site, while trying to compile the code it is throwing the following error - :-1: error:…
RicoRicochet
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1 answer

What does Failed_Reason_Other_Than_A_Connection_Already_Exists mean?

I am trying to connect to a Impinj Speedway RFID reader using LLRP and I am getting the following error code: Failed_Reason_Other_Than_A_Connection_Already_Exists More specifically I am sending a GET_READER_CONFIG message and getting:
Chocksmith
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1 answer

Is there any way in LLRP to configure antenna switches?

Rfid Readers perform switches between antennas while using multiple antennas. Reader runs one antenna while others sleeping and switches one by one. It makes it fast so running one antenna at a time doesn't matter. According to my observations, the…
Safa Kadir
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How can I receive temperature messages from an Impinj reader over LLRP?

I am attempting to monitor the temperature of a reader over an LLRP connection. In out_impinj_ltkcpp.h I see a class called CImpinjReaderTemperature that looks mostly boilerplate: class CImpinjReaderTemperature : public CParameter { public: …
adc
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C++ file gives segmentation fault error after any modifications

I wrote a piece of C++ code to connect with RFID reader using LLRP API on CentOS 7 system (64bit) and it has been working perfectly. I took that very .cpp file and copied it to my Ubuntu 14.04 desktop (64bit as well) and after "make" -ing the file…
RicoRicochet
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FX9500 LLRP User Application Connection Issue

I'm working with a Motorola (Zebra) FX9500 RFID reader and trying to get a user application running that integrates with the LLRP Toolkit. The FX9500 comes preloaded with JamVM that supports java 1.5. My test application is simple: connects to the…
darryl_mc
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