You need to go trough the array and add two characters (for each nibble) to the string buffer. At the end you add the null terminator. ... <看更多>

void setup() {. byte example[] = {0x31, 0x32, 0x33, 0x34};. int length = 4;. String result = "";. String hexstring = "";. for(int i = 0; i < length; i++) {. ... <看更多>

How to convert the char array to Byte array? I tried every method but it doesn't work. char CardNumber[8] = "B763AB23"; ... ... <看更多>

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char my_str[] = {72, 101, 106, 44, 32, 10, 86, 101, 114, 100, 101, 110, 33, 0}; char outputBuffer[3]; // Helper function for converting byte value to ... ... <看更多>