fixed                    fixed
           [-- randomValue --]
    -------                   ----
    a=abcd: 123 time=10;band=1\r\n

                              <~~~~~~ insert new value here

    a=abcd: 123 time=10;band=1;format=2,mode=4\r\n
    -------[-- randomValue --]                ----
                              ;format=2,mode=4      <~~~~~ inserted value here