Specification Sheet

Table Of Contents

WT901 | Datasheet v20-0702 | http://wiki.wit-motion.com/english

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5.1.7 Atmospheric Pressure and Height Output

0x55

0x56

SUM

Calculated formula：

Atmospheric pressure P = (( P3<<24)| ( P2<<16)| ( P1<<8)| P0 (Pa)

Height H = (( H3<<24)| ( H2<<16)| ( H1<<8)| H0(cm)

Checksum：

Sum=0x55+0x54+P0+P1+P2+P3+H0+H1+H2+H3

Note:This only applies to devices with barometer(WT901B, HWT901B,

BWT901BCL, WTGAHRS1, WTGAHRS2)

5.1.8 Longitude and Latitude Output

0x55

0x57

Lon0

Lon 1

Lon 2

Lon 3

Lat0

Lat 1

Lat 2

Lat 3

SUM

Calculated formula：

Longitude Lon = ((Lon 3<<24)| (Lon 2<<16)| (Lon 1<<8)| Lon 0

In NMEA0183 standard , GPS output format is ddmm.mmmmm (dd for the

degree, mm.mmmmm is after decimal point ), the module removes the

decimal point during output, so the degree of longitude can be calculated as

follows:

dd=Lon/100000000;

mm.mmmmm=(Lon%10000000)/100000；(% calculate Remainder)

Latitude Lat = ((Lat 3<<24)| (Lat 2<<16)| (Lat 1<<8)| Lat 0 (cm)

In NMEA0183 standard , GPS output format is ddmm.mmmmm (dd for the

degree, mm.mmmmm is after the decimal point ), the module removes the

decimal point during output, so the degree of latitude can be calculated as

follows::

dd=Lat/100000000;

mm.mmmmm=(Lat%10000000)/100000;(% calculate Remainder)

Checksum:

Sum=0x55+0x54+ Lon 0+ Lon 1+ Lon 2+ Lon 3+ Lat 0+ Lat 1+ Lat 2+ Lat 3

Note: This only applies to devices with GPS module(WTGAHRS1, WTGAHRS2)