# Usage

## Basic 
In order to start using the gr-lora-sdr project you will need an flowgraph which can be made using gnuradio-companian.
The flow graph should look something like this :
![overview](images/png/overview-gnuradio.png "Flowchart")
Its important that all the Rx and Tx components are in the flowgraph or the generated code will not work.
In the [/apps/](https://github.com/martynvdijke/gr-lora_sdr/tree/dev/apps) folder there are some examples on the generated code (from gnuradio-companian) and the grc files to be able to modify the examples in gnuradio-companian itself, be sure to have a look !

## Examples
- An example of a transmitter and a receiver
  - For the transmitter you can use lora_TX.grc, and this will use an USRP to send the LoRa packets on the connected network.
  - For the receiver you can use lora_RX.grc, and this will use an USRP to receive the LoRa packets on the connected network.
- Simulation of LoRa SDR without UHD, is possible using the simulation_lora.grc files and will simulate an entire transceiver chain of the LoRa packet without the need of an USRP.