I looked at the history of an GQ-EMF390v2Re 3.75 device, and found this:
parseGEMF_HIST: aa 55 00 35 00 e0 14 44 23 3d 3d 49 5a 08 595.500 3.500 775122.188
parseGEMF_HIST: aa 55 00 35 00 a0 13 44 23 3d 3d 49 5a 07 590.500 3.500 775122.188
parseGEMF_HIST: 55 aa 18 07 0a 0b 34 1f aa 55 00 34 00 40 2024-07-10 11:52:31
parseGEMF_HIST: aa 55 00 34 00 40 13 44 0b 78 1b 49 5a 08 589.000 3.400 636800.688
parseGEMF_HIST: aa 55 00 34 00 20 12 44 0b 78 1b 49 5a 06 584.500 3.400 636800.688
The data string is 14 bytes long and ends with either "5a 06", or "5a 07", or "5a 08".
According to your GQ-RFC1701 GQ EMF Communication Protocol document, those data strings should be only 12 bytes, so the last 2 bytes aren't supposed to exist! Please, update me: what are they doing in the data string, and what is there meaning?