EXTECH EX540 multimeter series String Conversion

How to convert a string to a multimeter EX540 wireless data in the value of the measure? There are still 14 bytes per read com port. Communication settings for my wireless module series is COM4, 2400, 8, N-1 with XON/XOFF. Maybe someone recognizes this data format because when the display value is zero '0' the chain of the series is always a hexadecimal value of 0 x 1020 3040 5060 7080.

DATA (8 bytes), ATTR (4 bytes), LRC (2 bytes) without CR/LF.

A 1020 3040 5060 7080 90 2 B0C0 DFEE

Displayed value: 0,00000 Hz (this one is in Hz to show zero point).

1020 3042 5E6E 7080 91A 4 B8C0 D7EC

Reading display: 75.0 F

1020 3441 586 D 7080 91A 4 B8C0 D9EE

Reading display: 1678,1 F

1020 354F 7080 91A 4 B8C0 D2E9 5E64

Display playback: OL

dman271828,

Looks like the Hi nibbles of each byte never change.   A sort of byte identifier.  I have attached a vi that removes salvation nibbles and combines other OL nibbles in U8s.  Note that two bytes can now be combined to return something that looks like the value you expected.  It must just be multiplied by a power of 10.  Power of 10 is quite possibly a nibble in the returned data.

Tags: NI Hardware

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