Abdullah Yıldırım

TURKEY • + Follow

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UNITED STATES OF AMERICA
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Engineer

UNITED STATES OF AMERICA
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Dmytro Skybin

UKRAINE
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3

Components

	RFM95W-868S2	x 1
	Ra-01 Ai-Thinker	x 1
	ESP8266EX Espressif Systems	x 1

Description

LoRa Module for Raspberry Pi & Arduino, ESP8266 - Testing LoRa under sea

There are many lora modules and many boards that contain lora module on the market. Its modules are difficult to use alone, and the boards never fully meet our needs. I designed a programmable lora module so that it would be easy to use with all kinds of boards. The mcu controlling the module is an esp8266 chip. In this way, our module gained Wi-Fi feature. In particular I did a few tests with the Raspberry Pi Pico, which gives the pico board the Wi-Fi feature. You can program the board as you wish with the ESP8266EX method. I just wrote a code that will enable two lora modules to communicate with each other. The rest of the development process is in your hands. Below are two different board designs and test results. I hope this module will help you improve your projects.Feel free to contact me for any problem & you can check my github page : github.com/byronin/LoRa_Wi-Fi_Module

TEST

Code

LoRaSender_Receiver

LoRaSender_Receiver.ino

Arduino

#include <SPI.h>
#include <LoRa.h>

void setup() {
  Serial.begin(9600);
  pinMode(0, OUTPUT);
  //SPI.begin();
  LoRa.setPins(5, 16, 4);
  while (!Serial);

  Serial.println("LoRa Sender");

  if (!LoRa.begin(868E6)) {
    Serial.println("Starting LoRa failed!");
    while (1);
  }
}

void loop() {
  if (Serial.available() > 0) {
    digitalWrite(0, HIGH);
    LoRa.beginPacket();
    LoRa.print(Serial.readString());
    LoRa.endPacket();
    delay(50);
    digitalWrite(0, LOW);
  }
  int packetSize = LoRa.parsePacket();
  if (packetSize) {
    digitalWrite(0, HIGH);
    // received a packet
    Serial.print("Received packet '");
    // read packet
    while (LoRa.available()) {
      Serial.print((char)LoRa.read());
    }
    // print RSSI of packet
    Serial.print("' with RSSI ");
    Serial.println(LoRa.packetRssi());
    delay(50);
    digitalWrite(0, LOW);
  }

}

Schematic and Layout

Schematic

Ra-01_Sch.png

Download BOM(Bill of materials)

Nov 30,2022

1,738 views

LoRa Module for Raspberry Pi & Arduino, ESP8266 - Testing LoRa under sea

I designed two different LoRa module PCBs with ESP8266 on them. You can use these modules to communicate in all your projects.

1738

7.25 (1)

Published: Nov 30,2022

Standard PCB

BOM(Bill of materials)

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