Send LoRa Encrypted data using REYAX RYLR998

1/*
2 * RYLR998 Encrypted Transmit 
3 * December 31st 2022 
4 * Carlo Stramaglia
5 * https://www.youtube.com/c/CarloStramaglia
6 * To change the Password, change the 8 digits in the below function LoRa.print("AT+CPIN=11223344\r\n");
7 * You need to have the same password on both Receiver and Transmitter
8 */
9
10#include <SoftwareSerial.h>
11#include "OneButton.h"
12
13SoftwareSerial LoRa(6, 5); // First (6) connected to TX of RYLR998, Second (5) to RX of RYLR998
14
15#define PIN_INPUT 2
16#define PIN_LED 13
17
18OneButton button(PIN_INPUT, true);
19int ledState = HIGH;
20
21String msg = "";
22int waiting = 200;
23int i=0, j=0;
24char messageNumber[10] = "";
25
26
27void setup() { 
28  pinMode(PIN_LED, OUTPUT);
29  digitalWrite(PIN_LED, ledState);
30  button.attachDoubleClick(doubleClick);
31  button.attachClick(Click);
32  LoRa.begin(57600);
33  set_AT_commands ("51","18");
34  delay(2000);
35  LoRa.print("AT+BAND=868100000\r\n"); // Placed this command because sometimes the board was going back to US standard
36  delay(2000);
37}
38
39void loop() {  
40  button.tick();
41  i=i+1;
42  if (i>300) {
43    j=j+1;
44    sprintf (messageNumber, "@%i$",j);
45    send_AT_message("50", messageNumber);
46    i=0;
47  }
48  delay(10);
49
50}
51
52
53void get_serial_data(){
54  if (LoRa.available()){
55    msg = LoRa.readString();
56  }
57}
58
59void set_AT_commands(String address, String network_ID){
60    LoRa.print("AT\r\n");                           // Just a check if the module is well connected
61    delay(waiting);   
62    LoRa.print("AT+ADDRESS=" + address + "\r\n");   // Device Address will be stored in Flash
63    delay(waiting);
64    LoRa.print("AT+NETWORKID="+network_ID+"\r\n");  // Network ID will be stored in flash
65    delay(waiting);   
66    LoRa.print("AT+PARAMETER=9,7,1,12\r\n");        // Default data. Can be deleted
67    delay(waiting);
68    LoRa.print("AT+IPR=57600\r\n");                 // Lower serial speed. My Arduino was not working properly at 115200
69    delay(waiting);
70    LoRa.print("AT+RESET\r\n");                     // Reset is required otherwise seems not to work properly at startup
71    delay(waiting);
72    LoRa.print("AT+BAND=868100000\r\n");            // Eurpean Bandwdth
73    delay(waiting);
74    LoRa.print("AT+CPIN=11223344\r\n");             // Encrypted password should be the same as the receiver
75    delay(waiting);
76    
77}
78
79
80void send_AT_message(String address, char* textmessage){
81    int Lenght=0;
82    Lenght = strlen (textmessage);
83    LoRa.print("AT+SEND=" + address + "," + Lenght + "," + textmessage + "\r\n");
84    delay(waiting);
85}
86
87void doubleClick()
88{
89  ledState = LOW;
90  digitalWrite(PIN_LED, ledState);  
91  LoRa.print("AT+CPIN=12345678\r\n");    // Change Password
92  //  LoRa.print("AT+BAND=868100000\r\n");
93} 
94
95void Click()
96{
97  ledState = HIGH;
98  digitalWrite(PIN_LED, ledState);
99  LoRa.print("AT+CPIN=11223344\r\n");   // Put back the Password
100  //  LoRa.print("AT+BAND=868100000\r\n");
101   
102}

1/*
2 * RYLR998 Encrypted Receiver December 31st 2022 
3 * Carlo Stramaglia
4 * https://www.youtube.com/c/CarloStramaglia
5 * To change the Password, change the 8 digits in the below function LoRa.print("AT+CPIN=11223344\r\n");
6 * You need to have the same password on both Receiver and Transmitter
7 */
8
9#include <SoftwareSerial.h>
10#include <U8g2lib.h>
11
12U8G2_SSD1306_128X32_UNIVISION_F_SW_I2C u8g2(U8G2_R0, /* clock=*/ SCL, /* data=*/ SDA, /* reset=*/ U8X8_PIN_NONE);   // Adafruit Feather ESP8266/32u4 Boards + FeatherWing OLED
13SoftwareSerial LoRa(6, 5); // RX, TX
14
15//String incomingstring;
16String msg = "", received_msg = "";
17int waiting = 200;
18
19
20void setup() {
21  LoRa.begin(57600);
22  u8g2.begin();
23  set_AT_commands ("50","18");
24  msg="";
25  u8g2.clearBuffer();          // clear the internal memory
26  u8g2.setFont(u8g2_font_ncenB08_tr); // choose a suitable font
27  u8g2.drawStr(0,10,"Ready to Receive");  // write something to the internal memory
28  u8g2.sendBuffer();          // transfer internal memory to the display  
29}
30
31void loop() {
32  delay (50);
33  get_serial_data();
34  if(msg != ""){ 
35      int delimiter_1, delimiter_2;
36      delimiter_1 = msg.indexOf("@");
37      delimiter_2 = msg.indexOf("$", delimiter_1 + 1);
38
39      received_msg = msg.substring(delimiter_1 + 1, delimiter_2);
40      int str_len = received_msg.length() + 1;
41      char messageLocal[str_len];
42
43      received_msg.toCharArray(messageLocal, str_len);
44
45      u8g2.clearBuffer();          // clear the internal memory
46      u8g2.setFont(u8g2_font_ncenB08_tr); // choose a suitable font
47      u8g2.drawStr(0,10,"Receiving...");  // write something to the internal memory      
48      u8g2.drawStr(0,25,messageLocal);  // write something to the internal memory
49      u8g2.sendBuffer();          // transfer internal memory to the display    
50    }
51}
52
53
54void get_serial_data(){
55  if (LoRa.available()){
56    msg = LoRa.readString();
57  }
58}
59
60void set_AT_commands(String address, String network_ID){
61    LoRa.print("AT\r\n");                           // Just a check if the module is well connected
62    delay(waiting);
63    LoRa.print("AT+ADDRESS=" + address + "\r\n");   // Device Address will be stored in Flash
64    delay(waiting);
65    LoRa.print("AT+NETWORKID="+network_ID+"\r\n");  // Network ID will be stored in flash
66    delay(waiting);        
67    LoRa.print("AT+PARAMETER=9,7,1,12\r\n");        // Default data. Can be deleted
68    delay(waiting);   
69    LoRa.print("AT+IPR=57600\r\n");                 // Lower serial speed. My Arduino was not working properly at 115200
70    delay(waiting);
71    LoRa.print("AT+RESET\r\n");                     // Reset is required otherwise seems not to work properly at startup
72    delay(waiting);
73    LoRa.print("AT+BAND=868100000\r\n");            // Eurpean Bandwdth 
74    delay(waiting);
75    LoRa.print("AT+CPIN=11223344\r\n");             // Encrypted password should be the same as the receiver
76    delay(waiting);
77}

1/*
2 * DO THIS ONLY ONCE ON BOTH RECEIVER AND TRANSMITTER
3 * RYLR998 Setup code for 57600 baud communication 
4 * December 31st 2022 
5 * Carlo Stramaglia
6 * https://www.youtube.com/c/CarloStramaglia
7 *
8 */
9
10#include <SoftwareSerial.h>
11
12SoftwareSerial LoRa(6, 5); // First (6) connected to TX of RYLR998, Second (5) to RX of RYLR998
13
14
15String msg = "";
16int waiting = 200;
17int i=0, j=0;
18char messageNumber[10] = "";
19
20
21void setup() { 
22  LoRa.begin(115200);
23  set_AT_commands ("100","18");
24  delay(5000);
25}
26
27void loop() {  
28  
29}
30
31
32void get_serial_data(){
33  if (LoRa.available()){
34    msg = LoRa.readString();
35  }
36}
37
38void set_AT_commands(String address, String network_ID){
39    LoRa.print("AT\r\n");                           // Just a check if the module is well connected
40    delay(waiting);   
41    LoRa.print("AT+ADDRESS=" + address + "\r\n");   // Device Address will be stored in Flash
42    delay(waiting);
43    LoRa.print("AT+NETWORKID="+network_ID+"\r\n");  // Network ID will be stored in flash
44    delay(waiting);   
45    LoRa.print("AT+PARAMETER=9,7,1,12\r\n");        // Default data. Can be deleted
46    delay(waiting);
47    LoRa.print("AT+IPR=57600\r\n");                 // Lower serial speed. My Arduino was not working properly at 115200
48    delay(waiting);
49    LoRa.print("AT+RESET\r\n");                     // Reset is required otherwise seems not to work properly at startup
50    delay(waiting);
51    LoRa.print("AT+BAND=868100000\r\n");            // Eurpean Bandwdth
52    delay(waiting);
53    
54}