Usage

Input/Output Overview

A frequent question that is raised regards the data types of gr-lora's inputs and outputs -- why they are gray as opposed to blue (complex float), yellow (short), etc. gr-lora's input and output is predominantly handled by GNU Radio's message passing API. This API is a powerful complement to GNU Radio's default synchronous datapath, and is well suited to handling packetized data -- such as what a MAC/layer 2 parser would pass to a PHY/layer 1.

The cleanest way to pass data into and out of gr-lora is with the Socket PDU block. The Socket PDU is a core GNU Radio block, and essentially exposes a websocket within the flowgraph. Configuring the Socket PDU is easy.

Input

Into gr-lora's encoder: create a Socket PDU and configure it to: Type=UDP Server, Host=127.0.0.1, Port=your choice, MTU=10k. Connect its output pdus port to the encoder's in port. To send data to the LoRa encoder, first start your flowgraph, then write data to your Socket PDU is if it were a conventional websocket. The easiest way to get up in running is with netcat: nc -u [IP] [PORT]

Output

• Out of gr-lora's decoder: create a Socket PDU and configure it to: Type=UDP Client, Host=127.0.0.1, Port=your choice, MTU=10k. Connect your decoder's out port to Socket PDU's input pdus port. Then configure a UDP server to ingest Socket PDU's output -- this can be a server written in your own application, or a command line tool of your choice. Netcat again is easy: nc -l -u [IP] [PORT] Start your server application, and then start your flowgraph.