Change AT settings of the HM-10

HM-10_Commander.ino

// Dehan Lamprecht, 2020
// Allows changing the settings of the HM-10 (or MLT-BT05) module
// Adapted from http://www.martyncurrey.com/hm-10-bluetooth-4ble-modules/

#include <SoftwareSerial.h>
SoftwareSerial BTSerial(2, 3); // RX | TX

char c=' ';
boolean NL = true;
 
void setup() 
{
    Serial.begin(9600);
    Serial.print("Sketch:   ");   Serial.println(__FILE__);
    Serial.print("Uploaded: ");   Serial.println(__DATE__);
    Serial.println(" ");
 
    BTSerial.begin(9600);  // default baud rate of HM-10. 
    Serial.println("BTserial started at 9600");
}
 
void loop()
{
    // Read from the Bluetooth module and send to the Arduino Serial Monitor
    if (BTSerial.available())
    {
        c = BTSerial.read();
        Serial.write(c);
    }
 
 
    // Read from the Serial Monitor and send to the Bluetooth module
    if (Serial.available())
    {
        c = Serial.read();
 
        // do not send line end characters to the HM-10, or do, these things are nothing if not inconsistent
        //if (c!=10 & c!=13 ) 
        //{  
             BTSerial.write(c);
        //}
 
        // Echo the user input to the main window. 
        // If there is a new line print the ">" character.
        if (NL) { Serial.print("\r\n>");  NL = false; }
        Serial.write(c);
        if (c==10) { NL = true; }
    }
}