In this guide we are going to show the next things:

• Test that the COMMS subsystem is working
• Learn how to create a Platform IO Project
• Send a LoRa message
• Receive the LoRa message with the LoRa Receiver subsystem

Blink example

• Open Platform IO
• Go to home of Plaform IO
• Create a project, select the board Espressif ESP32-S3-DevKit, and select the Arduino framework
• Change the source code to the next one:

#include <Arduino.h>

// the setup function runs once when you press reset or power the board
void setup() {
  // initialize digital pin LED_BUILTIN as an output.
  pinMode(36, OUTPUT);
  Serial.begin(9600);
}

// the loop function runs over and over again forever
void loop() {
  Serial.println("Hello world!");
  digitalWrite(36, HIGH);  // turn the LED on (HIGH is the voltage level)
  delay(1000);                      // wait for a second
  digitalWrite(36, LOW);   // turn the LED off by making the voltage LOW
  delay(1000);                      // wait for a second
}

• Connect the ESP-Prog to the computer with a microUSB cable. You should be able to see the prototype system Power led high.

• Program the software with Platform IO

• Open your serial terminal and check that you are able to receive the “Hello world” message. You can do it using the screen command as:

$ screen /dev/tty.usbserial-143101 -b 9600

Dont forget that in order to close the connection you need to press Ctrl+A, and then press K.

Flash LoRa receiver software

• Download the zip file with the code of the LoRa receiver software, called “LoRa-Receiver-Code”
• Open it with Platform IO
• Connect the LoRa Receiver PCB to your computer using a USB-C Cable.
• Make sure you have selected the port correctly.
• Program the software with Platform IO

Open the output of this board with screen:

$ screen /dev/tty.usbserial-143101 -b 9600

Flash a example code in the COMMS subsystem that sends a LoRa message

• Download the zip file with the code of the COMMS example, called “Example-COM-Send-Lora”.
• Open it with Platform IO
• Connect the LoRa Receiver PCB to your computer using a USB-C Cable.
• Make sure you have selected the port correctly.
• Program the software with Platform IO

Open the output of this board with screen:

$ screen /dev/tty.usbserial-143101 -b 9600