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c++arduinohexstore

Store hex value as string

I'm working on an Arduino project and I want to store a hex value as string.

eg: Hex is C697C63B

for (byte i = 0; i < bufferSize; i++) {
     Serial.print(buffer[i], HEX);
}

I would like to store the String as x = "C697C63B";

  String CardID = "";
  for (byte i = 0; i < bufferSize; i++) {
    CardID += (buffer[i],HEX);
    Serial.println(CardID);
  }

But the Sting is stored as CardID = 16161616

Solution

  • You should use an ostringstream:

    auto outstr = std::ostringstream{};
outstr << std::hex << 0xC697C63Bul;
auto myHexString = outstr.str();