M7 GX Technical Manual
67
Raveon Technologies Corp.
4
Latitude
dddmm.mmmm format. It is signed. + is north, - is south. No sign
means north. Note: typically there are 4 decimal places, but as few
as 0 decimal places are possible. Null field if no GPS lock.
5
Longitude
dddmm.mmmm format. It is signed. + is east, - is west. No sign
means east. Note: typically there are 4 decimal places, but as few as
0 decimal places are possible. Null field if no GPS lock.
6
UTC time
The UTC time at the time the transmission was made. Hhmmss
format. Null field if no GPS lock.
7
GPS Status
0=not valid position. 1=GPS locked and valid position. 2=Differential
or WAAS fix.
8
Num Satellites
The number of satellites in view
9
Altitude
The altitude in meters. Null field if no GPS lock.
10
Temperature
The internal temperature of the RV-M7 in degrees C. Typically this is
5-20 degrees above ambient.
11
Voltage
Input voltage to the device that sent this position.
12
IO status
A decimal number representing the binary inputs.
13
RSSI
The signal-strength of this message as measured by the receiver, in
dBm. Note, if the message went through a repeater, it is the signal
lever of the repeated message.
14
Speed
The speed of the device in km/hour, 0-255
15
Heading
The heading of the device 0-360 degrees
16
Status
Status flags received from the device. Not all products support
generating all status flag codes.
NULL means no alerts.
“P” means a proximity alert.
“M” means man-down alert
“A” General alert, usually due to pressing an alert button
“C” Critical alert, usually due to pressing and holding alert button
“I” Impact alert
“V” Vibration
“S” Service required on product
“X” Gas fume sensor detects CO or other gas.
17
Spare
A spare field. May be used for UTC date in the future. Typically
NULL.
18
*
The “*” NMEA end-of-message identifier.
19
Checksum
The NMEA 0183 checksum.
Example Sentence:
$PRAVE,0001,0001,3308.9051,-11713.1164,195348,1,10,168,31,13.3,3,-83,0,0,,*66
This example shows a unit at 33° 8.9051 north latitude and 117° 13.1164 east
longitude. It is not moving (0 speed). Its signal strength was -83dBm. Its altitude
is 168 meters.
