Dragino LA66 Shield -- Basic Example Problem

[soothingmist]

Greetings to all of you.

Am trying to transition from Dragino's Arduino LoRa Shield to the Arduino LA66 LoRaWAN Shield since the former shield is no longer being manufactured. Have had good success with Dragino's earlier shield and wanted to continue with that line of products. Project results to date are posted here, to include all documentation and software: GitHub - SoothingMist/Scalable-Point-to-Point-LoRa-Sensor-Network: Builds a peer-to-peer network of LoRa transceivers for remote sensing. Uses flood-messaging to eliminate need for LoRaWAN and third-party services.. Will continue to publish results as the project evolves.

At issue with the transition to LA66 is that I must be missing something. Am hoping for some insights from those more experienced with the device. Have read through the user guide and studied the basic example from which my own attempt derives.

The basic example I am working with is LA66-LoRaWAN-shield-AT-command-via-Arduino-UNO. My attempt at modification (shown below) is to first read the AT command. The AT command is sent to the LA66. The results are read and displayed. The modification operates without compile or runtime errors but the output convinces me that some of the results from LA66 are missed. The simplicity of my code convinces me I am clearly missing something important.

Very glad for any insights the community can offer. Will cite those who provide useful input.

Many thanks.

#include <SoftwareSerial.h> // built-in arduino library
String inputString = "\0"; // a String to hold incoming serial data
SoftwareSerial LA66_serial_port(10, 11); // Arduino RX, TX

void setup()
{
  // Initialize serial communications with arduino and LA66.
  // A known bug in arduino's IDE causes junk to be displayed in the first line.
  Serial.begin(9600); Serial.println('\n'); Serial.flush();
  LA66_serial_port.begin(9600);
  
  // clear transceiver buffer
  while (LA66_serial_port.available()) int dumpChar = LA66_serial_port.read();
}

void loop()
{
  char inChar = '\0'; // a single character read from a buffer

  // Get an AT command from the serial monitor
  Serial.println("\nEnter an AT command through the serial monitor"); Serial.flush();
  while( ! Serial.available()); // wait for the command to be entered
  inputString = "\0";
  while (Serial.available())  // read the command
  {
    // get a new byte:
    inChar = (char)Serial.read();
    //Serial.print(inChar); Serial.flush();

    // If the incoming character is a newline or carriage-return, dump the rest of the input buffer
    // Otherwise, add the character to the input string.
    if (inChar == '\n' || inChar == '\r') while (Serial.available()) Serial.read();
    else inputString += inChar;
    delay(5); // found pausing the software is necessary to allow time for the hardware to do its thing
  }

  // Semd the command to the transceiver
  LA66_serial_port.print(inputString + '\n');
  Serial.println("Sent Command: " + inputString); Serial.flush(); // display the command

  // Test ability to read the results from LA66
  while(true)
  {
    if(LA66_serial_port.available())
    {
      inChar = (char)LA66_serial_port.read();
      Serial.print(inChar); Serial.flush();
    }
  }
}