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 knows what.
On
Before sending messages to a reader parameters should be fitted and encoding should be done according to llrp protocol.
An example can be found in a npm package in file https://github.com/YaroslavSl/llrp-ts/blob/master/src/getLlrpMessage.ts
Also wireshark and Impinj ItemTest help to understand the llrp protocol communication.
I have been trying with motorola equipment recently and as per my understanding the library which you mentioned(https://github.com/GeenenTijd/llrp-nodejs) is the only one latest package available.
Try to check the source code in (LLRPMain.js) which is understandable and you could tweak it further by using network sniffers like 'wireshark' and understand the communication from both sides. This approach helped me.
Hope this would be useful and please let me know your progress.