Sending string

[brugk000]

How do I create a payload as a string with a uint_8 data type

[ngraziano]

You can simply cast the char buffer to uint8_t pointer.

    char buffer[5] = "data";
    uint8_t *p = reinterpret_cast<uint8_t *>(buffer);
    LMIC.setTxData2(2, p, 4, false);