Quake Global PL131, Руководство пользователя

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User Guide to PL131
Document Number 1155-4713 Rev E
Page 10
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4.1.2 Status
This message is an MO message.
Table 4-2: Status message
Field Name Data Type Size Notes
Message opcode 0x61 U8 1 byte Status message
Location Geodetic compressed
Lat / Lon. If no fix is
available, the status bit
is set (see Reason
field in this table) and
the last known location
is used. U8[6]
(3 Bytes Lat +
3 Bytes Lon)
6 bytes
Lat/Lon conversion to geodetic:
long double lat, lon, lon_code, lat_code;
l
at = 90.0 - ((unsigned long)lat_code /
((double)0XFFFFFF)) *180.0;
lon = ((unsigned long)lon_code /
((double)0XFFFFFF))*360.0;
if(lon > 180.0)
lon = lon - 360.0;
See parsed example in Table 4-2.2 .
Speed Kilometers/Hour U8 1 byte 0-255 km/h
Cog 2 degrees per bit U8 1 byte 0-358
Battery voltage 1000ths of volts U16 2 bytes Range:
0 - 0xFFFD,
error - 0xFFFF
overflow - 0xFFFE
0 to 65.534 volts (sent in millivolts)
Signal strength
(rssi) Received Signal
Strength Indication
Value between 0 - 99
(The server will map
this value to power
level (dBm) or “Signal
Value”.) U8 1 byte To convert the rssi to dBm use the
following formula: (rssi * 2)
– 113
For example:
0 - (-113) dBm or less
1 - (-111) dBm
2..30 - (-109)dBm.(-53)dBm / 2 dBm
per step
31 - (-51) dBm or greater
99 - Not known or not detectable
Temperature Ambient temp (C) I8 1 byte -128C MIN / 127C MAX
Reason The reason for the
transmittal of the
status message. This
is a bit field. If the bit
is set, the status was
true. (See example in
Table 4-2.1 .)
U8 1 byte
Reason Value Bit
Scheduled 1 0
Defaulted Configuration 2 1
Motion Detected 4 2
Estimated Time 8 3
Network Time 16 4
No Fix 32 5
Min Fix 64 6
Unused 128 7