User Guide to PL131
Document Number 1155-4713 Rev E
Page 11
C
ONFID
ENTIA
L
In
fo
rm
a
ti
o
n
c
la
s
s
ifi
e
d
Co
n
fi
d
e
n
ti
a
l
-
Do
n
o
t
c
o
p
y
(Se
e
l
a
s
t
p
a
g
e
f
o
r o
b
lig
a
ti
o
n
s
)
This document contains confidential and proprietary information of Quake Global corporation. It may be used by recipient only for the purpose for which it was transmitted
and will be returned upon request or when no longer needed by recipient. Disclosure to unauthorized third parties or duplication without the express written permission of
Quake Global is prohibited. © 2013-2015 QUAKE GLOBAL, INC. - All rights reserved.
Field Name
Data
Type
Size
Notes
Timestamp
Seconds since
Nov 1, 2012
00:00:00 UTC. By
default the timestamp
will be based on GPS
time. If GPS time is
not available, either
the network time or
estimated time bit will
be set in the status bit
Reason field.
U32
4 bytes
Timestamp conversion:
NEW_EPOCH_OFFSET = 0x3DBC7E00u
Seconds difference between Jan. 6, 1980
(GPS Epoch) and Nov 1, 2012.
Timestamp = seconds since
GPS Epoch
-
NEW_EPOCH_OFFSET
Table 4-2.1: Example Status message
Data
Type
Size
61 DA D0 4D 24 32 AA 01 8E F4 01 02 40 21 D2 1D 6A 01
U8[]
18 bytes
Table 4-2.2: Example Status message - parsed
Field Name
Data (Hex)
Parsed Value
Message opcode
61
Status message
Location: Latitude/Longitude
DA D0 4D 24 32 AA
Lat: 35.2875, Lon: -120.6221
Speed
01
1 kph
Cog
8E
284 degrees
Battery voltage
F4 01
.5 volts
Signal strength
02
-109dbm
Temperature
40
40 degrees Celsius
Reason
21
Scheduled, No Fix
Timestamp
D2 1D 6A 01
8/2/2013 4:07:46 PM
4.1.3 Ack
This message can be either MO or MT.
Table 4-3: Ack message
Name
Data
Type Size
Notes
Message opcode 0x36
U8
1 byte
Ack
Acked message
opcode
Opcode of message being
Acked
U8
1 byte
Checksum
0x0000
U16
2 bytes Reserved
Timestamp
Seconds since Nov 1, 2012
00:00:00 UTC
U32
4 bytes
Timestamp conversion:
NEW_EPOCH_OFFSET = 0x3DBC7E00u
Seconds difference between Jan. 6, 1980
(GPS Epoch) and Nov 1, 2012.
Timestamp = seconds since
GPS Epoch
-
NEW_EPOCH_OFFSET
