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. 
