Constant byte array changes value during run time

[pauloscheidegger]

@david_2018

    for (i = 14; i < 28; i = i + 2) {
      data[i] = 256 * rcvd[i] + rcvd[i + 1];
      Serial.print(data[i]);
      Serial.print(" ");
    };

You are exceeding the bounds of both the data and rcvd arrays.

< edit >
Looking at it a bit longer, you are staying within bound of the rcvd array, but the out of bounds write to data is likely what is corrupting the message array (all depends on exactly where the compiler is storing the variables).

It seems you hit the bull's eye. I was the culprit. After correcting my gross error the message kept its original value forever. Thank you so much!

Unfortunately today the Sun is about to set and the inverted has gone asleep. Tomorrow I'll try to found remaining errors. Thank you both again,