I am trying to send data between Arduino Nano and D1 Mini (ESP 8266 Module)
My Code as below in Nano which will be the transmeting ,
#include <DES.h>
#include <SoftwareSerial.h>
SoftwareSerial link(2, 3); // Rx, Tx
DES des;
byte in[8];
String input;
char text[20];
char charVal[6];
char buf[30];
void setup() {
link.begin(9600);
Serial.begin(9600);
Serial.println("Hello! Pleace Enter Your Data to Encrypt");
}
void tdesTest() {
byte out[8];
byte key[] = {
0x3b, 0x38, 0x98, 0x37, 0x15, 0x20, 0xf7, 0x5e, // key A
0x92, 0x2f, 0xb5, 0x10, 0xc7, 0x1f, 0x43, 0x6e, // key B
0x3b, 0x38, 0x98, 0x37, 0x15, 0x20, 0xf7, 0x5e, // key C (in this case A)
};
Serial.println();
Serial.println("====== Triple-DES test ======");
//encrypt
Serial.print("Encrypt...");
unsigned long time = micros();
des.tripleEncrypt(out, in, key);
time = micros() - time;
Serial.print("done. (");
Serial.print(time);
Serial.println(" micros)");
printArray(out);
/*
//decrypt
for (int i = 0; i < 8; i++)
{
in[i] = out[i];
}
Serial.print("Decrypt...");
time = micros();
des.tripleDecrypt(out, in, key);
time = micros() - time;
Serial.print("done. (");
Serial.print(time);
Serial.println(" micros)");
printArray(out);
delay(2000);
*/
}
//printing output
void printArray(byte output[])
{
for (int i = 0; i < 8; i++)
{
if (output[i] < 0x10)
{
Serial.print("0");
}
Serial.print(output[i], HEX);
Serial.print(" ");
delay(100);
}
Serial.println();
}
void loop() {
while (Serial.available() > 0) {
String input = Serial.readString(); // read the incoming data as string
memset(in, 0, 9); // Erase the contents of in[]
input.toCharArray((char *)in, 9); // Copy up to 8 bytes from the string
tdesTest();
}
}
In printArray(byte output[])I am getting Output as HEX Byte as below
I am trying to send the this encrypted data to from Arduino nano to D1 Mini,
I have wrote a small Receiver Application in D1 Mini and It works , Receiver Code:
//Receiver code
#include <SoftwareSerial.h>
SoftwareSerial link(4, 0); // Rx, Tx
byte greenLED = 13;
char cString[2000];
byte chPos = 0;
byte ch = 0;
char dataStr[6];
void setup()
{
link.begin(9600); //setup software serial
Serial.begin(9600); //setup serial monitor
pinMode(greenLED, OUTPUT);
}
void loop()
{
while (link.available())
{
ESP.wdtDisable();
//read incoming char by char:
ch = link.read();
cString[chPos] = ch;
chPos++;
digitalWrite(greenLED, HIGH); //flash led to show data is arriving
delay(20);
digitalWrite(greenLED, LOW);
}
cString[chPos] = 0; //terminate cString
chPos = 0;
Serial.print(cString);
ESP.wdtEnable(1);
Serial.flush();
}
I want to pass this HEX data Generated to D1 Mini from Arduino Nano,
I have wrote test code in Arduino Nano for Transmitter(Nano) and between Receiver (D1 Mini) it works,
//Transmitter Code for Testing Connections
#include <SoftwareSerial.h>
SoftwareSerial link(2, 3); // Rx, Tx
byte greenLED = 12;
char text[20] ;
char charVal[6];
void setup()
{
link.begin(9600);
Serial.begin(9600);
}
void loop()
{
strcat(text, "Message"); //append to empty string
Serial.println(text); //print to local screen for debug*
link.println(text);
delay(10000);
}
Please help me to send this HEX data in single shot to D1 Mini.
