This is an example tutorial of point-to-point wireless communication between 2 Arduinos using Cytron RFM LoRa Shields.

1. Basic Requirements
2. Hardware Setup
3. Library Installation
4. Uploading Sketches
5. Arduino Sketches Overview
6. Screenshots

1. 2 Cytron RFM LoRa Shields
2. 2 Arduino-compatible boards
3. USB cable/accessories to upload Arduino program
4. Arduino IDE software

1. Stack Cytron RFM LoRa Shield onto Arduino compatible board with antenna installed as shown in picture below. In this case we are using CT-UNO.
2. Prepare 2 sets for this.

• CT-UNO with LoRa Shield on top

• CT-UNO with LoRa Shield with antenna installed

1. Download the zip file from here.
2. Open Arduino IDE, go to Sketch > Include Library > Add .ZIP Library, choose the downloaded zip file and click Open.

1. Download the Arduino sketches as zip files OR git clone this repo from here.
2. Grab one set of RFM LoRa Shield + Arduino that you have setup just now. We call it as Arduino LoRa Client.
3. Open and upload rf95_client.ino sketch to Arduino LoRa Client.
4. Grab another set of RFM LoRa Shield + Arduino that you have setup just now. We call it as Arduino LoRa Server.
5. Open and upload rf95_server.ino sketch to Arduino LoRa Server.

Refer here.

• Arduino LoRa Server

• Arduino LoRa Client